GEAS Physics (Pinoybix)

velocity and mass

Momentum is the product of: A. mass and time B. velocity and mass C. force and time D. force and mass

independent of

The period of the simple harmonic motion is _______ its amplitude. A. directly proportional to B. inversely proportional to C. equal to D. independent of

Young - Helmholtz color vision theory

The theory that the retina of the eye is provided with three sets of receptors, each of which is sensitive to one of the three primary colors is known as ___________. A. True color vision theory B. Young - Helmholtz color vision theory C. Primary vision theory D. Young - Huygen primary vision theory

Law of interaction

The third law of motion is also known as __________. A. Law of acceleration B. Law of inertia C. Law of interaction D. Law of momentum

equal to 0

The vector product of any vector with itself is ______. A. equal to 1 B. greater than 1 C. less than 1 D. equal to 0

equal to 0

The vector product of two parallel or antiparallel vectors is always ______. A. equal 1 B. greater than 1 C. less than 1 D. equal to 0

0.6

The velocity of sound in air increases by how many m/s for every 1ºC increase in temperature? A. 0.2 B. 0.4 C. 0.6 D. 0.8

Gamma ray

What is an electromagnetic radiation of very short wavelength emitted from the nucleus of a radioactive atom? A. Beta ray B. Alpha ray C. Gamma ray D. X-ray

Quantum

What is an elemental unit of energy? A. Quartz B. Quark C. Photon D. Quantum

3

A diatomic scale is a musical scale build up of how many major chords? A. 2 B. 3 C. 4 D. 5

255 Hz

A piano string with a length of 1.17 m and a mass of 21.0 g in under tension of 6.4 x 103 N, what is the fundamental frequency? A. 225 Hz B. 187 Hz C. 255 Hz D. 290 Hz

Mechanical wave

A wave that needs a material medium through which it can travel as it transfers energy? A. Electromagnetic wave B. Radiowave C. Microwave D. Mechanical wave

spin

Every electron has a certain amount of angular momentum called its _________. A. spin B. shell C. state D. quantum number

Starting friction

What is the maximum value of the static friction? A. Starting friction B. Sliding friction C. Kinetic friction D. Dynamic friction

Inertia

What is the property of matter which is the reluctance to change its state of rest or of uniform motion? A. Impulse B. Momentum C. Inertia D. Equilibrium

To describe the direction in space

What is the purpose of a unit vector? A. To describe the direction in space B. To indicate a magnitude without reference to direction C. To serve as comparison with other vectors D. To set a standard among vectors

Intensity

What refers to a measure of the energy of sound? A. Intensity B. Loudness C. Pitch D. Sone

Force field

What refers to a region of space at every point of which an appropriate test object would experience a force? A. Energy field B. Electric field C. magnetic field D. Force field

Diffraction grating

What refers to a series of parallel slits that produces a spectrum through the interference of light that is diffracted? A. Diffraction grating B. Polarization C. Coherent waves D. Reflection

Shock wave

What refers to a shell of high pressure produced by the motion of an object whose speed exceeds that of sound? A. Shock wave B. Mach wave C. Beat wave D. Sonic wave

Friction

What refers to an actual force that arises to oppose relative motion between contracting surfaces? A. Action force B. Reaction force C. Friction D. Drag

period

What refers to the time needed by an object in uniform circular motion to complete an orbit? A. path time B. orbit time C. revolution D. period

Luminous flux

What refers to the total amount of visible light given off by a light source? A. Luminous intensity B. Luminous flux C. Luminous efficiency D. Illumination

Complementary colors

What refers to two colors which combine to form white light? A. Complementary colors B. Secondary colors C. Primary colors D. Elementary colors

Aperture

What terms is used to describe the angular opening of a sphere that encloses the mirror? A. Angle of curvature B. Focal point C. Aperture D. Vertex

Mechanical energy

What type of energy is usually transmitted by rotary motion? A. Kinetic energy B. Potential energy C. Mechanical energy D. Rest energy

Convergent lens

What type of lens bring parallel light to a single real focal point? A. Magnifying lens B. Convergent lens C. Divergent lens D. Microscopic lens

Divergent lens

What type of lens deviates parallel light outward as though it originated at a single virtual focal point? A. Magnifying lens B. Convergent lens C. Divergent lens D. Microscopic lens

Concave mirror

What type of mirror that curves inward its center and converges parallel light to a single real focal point? A. Convex mirror B. Concave mirror C. Spherical mirror D. Chromatic mirror

Convex mirror

What type of mirror that curves outward toward its center and diverges parallel light as though the reflected light came from a single virtual focal point behind the mirror? A. Convex mirror B. Concave mirror C. Spherical mirror D. Chromatic mirror

Volume

Which is NOT a fundamental physical quantity of mechanics? A. Length B. Mass C. Volume D. Time

Time

Which is NOT a vector quantity? A. Displacement B. Velocity C. Acceleration D. Time

Indigo

Which of the following has the smallest wavelength band? A. Blue B. Indigo C. Green D. Yellow

hydraulic press

Which of the following is NOT a basic machine? A. lever B. incline plane C. hydraulic press D. wedge

Pascal's principle

"An external pressure exerted on a fluid is transmitted uniformly throughout the volume of the fluid". This statement is known as ________. A. Bernoulli's energy theorem B. Pascal's principle C. Archimedes principle D. Torricelli's theorem

Law of universal gravitation

"Every object in the universe attracts every other object with a force directly proportional to the product of their masses and inversely proportional to the square of the distance separating them". This statement is known as: A. Law of conservation of energy B. Law of universal gravitation C. Law of conservation of momentum D. Law of conservation of impulse

Huygen's principle

"Every point on the wavefront can be considered as a source of secondary wavelets that spread out in all directions with the wave speed of the medium. The wavefront at any time is the envelope of these wavelets". This statement is known as ________. A. Huygen's principle B. Snell's law C. Maxwell's hypothesis D. Doppler's effect

first law of motion

"If no net force acts on it, an object at rest will remain at rest and an object in motion will remain in motion at constant velocity". This statement is the _______. A. first law of motion B. second law of motion C. third law of motion D. d'Alembert's principle

Coulomb's law

"The force one charge exerts on another is directly proportional to the magnitudes of the charges and inversely proportional to the square of the distance between them". This statement is known as ________. A. Coulomb's law B. Kirchhoff's law C. Lenz's law D. Faraday's law

Principle of conservation of charge

"The net electric charge in an isolated system remains constant". This statement is known as ________. A. Principle of conservation of attraction B. Principle of conservation of charge C. Coulomb's law D. Principle of superconductivity

second law of motion

"The net force acting on an object equals the product of the mass and the acceleration of the object. The direction of the force is the same as that of the acceleration". This statement is the _______. A. first law of motion B. second law of motion C. third law of motion D. d' Alembert's principle

Snell's law

"The ratio of the sines of the angles of incidence and refraction is equal to the ratio of the speeds of light in the two media". This statement is known as ________. A. Huygen's principle B. Snell's law C. Maxwell's hypothesis D. Doppler's effect

Work-energy theorem

"The work done by the net force on a particle equals the change in the particle's kinetic energy." This statement is known as _________. A. Law of conservation of energy B. Work-energy theorem C. Law of conservation of work D. Total work theorem

third law of motion

"When an object exerts a force on another object, the second object exerts on the first a force of the same magnitude but in the opposite direction". This statement is the _____. A. first law of motion B. second law of motion C. third law of motion D. d'Alembert's principle

Conservation of angular momentum

"When the sum of the external torques acting on a system of particles is zero, the total angular momentum of the system remains constant ". This statement is known as: A. Conservation of energy B. Conservation of impulse C. Conservation of linear momentum D. Conservation of angular momentum

Law of conservation of momentum

"When the vector sum of the external forces acting on a system of particles equals zero, the total linear momentum of the system remaining constant." This statement is known as: A. Law of universal gravitation B. Law of conservation of impulse C. Law of conservation of momentum D. Law of conservation of energy

Principle of superposition

"When two or more waves of the same mature travel just a given point at the same time, the amplitude at the point is the sum of the amplitude of the individual waves". This statement is known as ________. A. Mach principle B. Doppler principle C. Principle of superposition D. Wave motion principle

360 m/s

A 3-m string is driven by a 240 Hz vibrator at its end. Determine the speed of transverse waves on the string if it resonates four segments? A. 340 m/s B. 360 m/s C. 430 m/s D. 420 m/s

Convergent lens

A camera usually uses what type of lens to form an image on a light-sensitive photographic film? A. Magnifying lens B. Convergent lens C. Divergent lens D. Microscopic lens

5

A chromatic scale is a diatomic scale with how many added half tones? A. 2 B. 3 C. 4 D. 5

machine

A device that transmits force or torque is called _______. A. mechanical tool B. machine C. axle D. wedge

Air resistance and gravitational pull

A free falling object is acted upon by which of the following? A. Weight of the body B. Air resistance and gravitational pull C. Gravitational pull D. Air resistance

40 N

A guitar string 30 cm long resonates in its fundamental to a frequency of 250 Hz. What is the tension in the string if 80 cm of the string "weighs" 0.80 grams? A. 20 N B. 30 N C. 10 N D. 40 N

1.80 N

A horizontal cord 5 m long has a mass of 2.5 grams. What must be the tension in the cord if the wavelength of a 120 Hz wave on it is to be 50 cm? A. 1.50 N B. 1.80 N C. 2.50 N D. 4.30 N

26°

A light ray is incident at an angle of 45° on one side of a glass plate of index of refraction 1.6. Find the angle at which the ray emerges from the other side of the plate. A. 26° B. 20° C. 22° D. 28°

85.8 ft/s

A rope 4 ft long weighs 0.7 lb. A blow on the rope produces a transverse wave. Determine the velocity of the wave considering that the tension is 40 lb. A. 75.8 ft/s B. 95.7 ft/s C. 78.5 ft/s D. 85.8 ft/s

always true

A rotating body has kinetic energy. This statement is ________. A. sometimes true B. sometimes false C. always true D. always false

continuous spectrum

A spectrum consisting of a wide range of unseparated wavelength is called ________. A. visible spectrum B. continuous spectrum C. emission spectrum D. discontinuous spectrum

line spectrum

A spectrum consisting of monochromatic slit images having wavelengths characteristic of the atoms parent is called __________. A. line spectrum B. continuous spectrum C. slit spectrum D. image spectrum

emission spectrum

A spectrum formed by the dispersion of light from an incandescent solid, liquid and gas is called ________. A. visible spectrum B. continuous spectrum C. emission spectrum D. discontinuous spectrum

1

A tempered scale is a musical scale with _______ equal frequency ratio intervals between the successive notes of an octave. A. 9 B. 10 C. 11 D. 1

786.7 Hz

A train blowing its whistle at 750 Hz approaches a station at the rate of 35mph. What frequency is heard by a man standing at the station considering the velocity of sound in air 1100 ft/s? A. 739.7 Hz B. 857.4 Hz C. 716.4 Hz D. 786.7 Hz

2.71 x 10^-8 W/cm2

A wave has pressure amplitude of 5 dynes/cm^2 and a velocity of 35.7 m/s, what is the absolute intensity considering that 0.001293gm/cm? A. 1.27 x 10^-8 W/cm2 B. 1.47 x 10^-8 W/cm2 C. 3.27 x 10^-8 W/cm2 D. 2.71 x 10^-8 W/cm2

Drag force

Air exerts force that is opposite to the car's motion. What is this force called? A. Reverse effective force B. Terminal force C. Drag force D. Aerodynamic force

10 g/cm3

All are values of the density of water except one. Which one? A. 1000 kg/m3 B. 62.4 lb/ft3 C. 10 g/cm3 D. 9.81 kN/m3

1 volt

An electron volt is the energy required by an electron that has been accelerated by a potential difference of how many volts? A. 1 volt B. 0.1 volts C. 10 volts D. 0.01 volts

14.58 s

An explosion occurs at a distance of 5 km from the observer. How long after the explosion does a person hear if the temperature is 18°C? Note: the speed of sound at STP (standard temperature and pressure) is 332 m/s and changes by 0.6 m/s for every 1 °C change in temperature. A. 14.58 s B. 12.45 s C. 11.87 s D. 17.54 s

moment of inertia and angular speed

Angular momentum is the product of ________. A. moment of inertia and linear speed B. moment of area and angular speed C. moment of inertia and angular speed D. moment of area and angular speed

Above 120 dB

At what intensity level will a noise be considered pollutant in the environment? A. Above 50 dB B. Above 100 dB C. Above 120 dB D. Above 150 dB

1 W/m2

At what intensity will sound wave starts to damage the ear of humans. A. 10 W/m2 B. 0.1 W/m2 C. 1 W/m2 D. 0.01 W/m2

- 40

At what temperature reading do the Celsius scale and the Fahrenheit scale have the same temperature? A. - 40 B. - 30 C. - 20 D. - 25

luminous emittance

Brightness is the same as __________. A. luminous emittance B. luminous efficiency C. luminous intensity D. illumination

relative speed after collision to relative speed before collision

Coefficient of restitution is the ratio of: A. relative speed after collision to relative speed before collision B. relative speed before collision to relative speed after collision C. relative speed to absolute speed D. absolute speed to relative speed

7.94 moles

Consider H3AsO3, Arsenic acid (H=1.01,As=74.9,O=16.0).How many mole is 1kg of H3AsO3? a. 7.94 moles b. 6.94 moles c. 5.94 moles d. 8.94 moles

power output to power input

Efficiency of a machine is the ratio of: A. power output to power input B. power input to power output C. total work done to total energy D. total energy to total power

Hund's rule

Electrons occupy all the orbitals of a given subshell singly before pairing begins. These unpaired electrons have parallel spins. This is known as: a. Building Up Principle b. Aufbau Principle c. Hund's rule d.David's rule

carbon

It is required for organic compounds. a. hydrogen b. oxygen c. boron d. carbon

lumen/ft2

Footcandle is equivalent to which combination of units? A. lumen/cm2 B. lumen/ft2 C. lumen/m2 D. lumen/in2

10^-12

For a 1kHz sound wave to be audible, it must have a minimum intensity of ______ W/m2? A. 10^-10 B. 10^-11 C. 10^-12 D. 10^-13

Coefficient of static friction is always greater than the coefficient of kinetic friction.

For the same materials in contact, what is TRUE between coefficient of static friction and coefficient of kinetic friction? A. Coefficient of static friction is always less than the coefficient of kinetic friction B. Coefficient of static friction is always equal to the coefficient of kinetic friction C. Coefficient of static friction is always greater than the coefficient of kinetic friction. D. Coefficient of static friction may be greater than or less than the coefficient of kinetic friction.

mass

Gravitation occurs between all objects in the universe by virtue of their ________. A. mass B. density C. weight D. volume

Phlogiston

It explains combustion as a result of loss of a substance. a. Phlogiston b. Roasting c. Reduction d. Fission

All of the choices.

How can loudness of sound be increased? A. By increasing the energy of sound B. By preventing sound waves to spread in different directions. C. By collecting and focusing sound waves at the receiving end. D. All of the choices.

In decibels

How is sound intensity measured? A. In beats B. In decibels C. In phons D. In sones

0

How many decibels should a sound to be barely audible? A. 0 B. 1 C. 0.1 D. 1.5

100,000

How many dynes are there in one newton? A. 10,000 B. 100,000 C. 1,000,000 D. D.1000

D.14.6

How many kilograms are there in 1 slug? A. 11.9 B. 12.5 C. 13.2 D. D.14.6

unstable equilibrium

If a cone is balanced on its apex, it illustrates what type of equilibrium? A. stable equilibrium B. neutral equilibrium C. unstable equilibrium D. translational equilibrium

Terminal velocity

If the forces acting on a falling body balance one another, the body continues to fall at a constant velocity. What is thus constant velocity called? A. Instantaneous velocity B. Free-falling body C. Gravitational velocity D. Terminal velocity

the image is smaller than the object

If the linear magnification of an optical system is less than one, it means that: A. the image and the object are of the same size B. the image is larger than the object C. the image is smaller than the object D. the image may be larger or smaller than the object

Friction

In a damped harmonic oscillator, what reduces the amplitude of the vibrations? A. Force B. Period C. Frequency D. Friction

clay

It is a product of the weathering of complex silicates, particularly of feldspars which are abundant minerals. a. clay b. chalk c. pyrite d.diamond

significant figures

It is customary to indicate accuracy by using a certain numbers of figures or digits. a. atomic mass unit b. International system c. significant figures d. supplementary units

false

In elastic collision, kinetic energy is conserved. This statement is: A. true B. false C. is either true or false, depending upon the colliding bodies D. is either true or false, depending on the impact of two colliding bodies

the reflected energy is absorbed within a very thin layer and converted to heat

In opaque material, A. light is able to pass through B. the reflected energy is absorbed within a very thin layer and converted to heat C. light is partially absorbed D. the refracted energy is absorbed within a thick layer and converted to heat

Resolving power

In optical system, what refers to its ability to produce separate images of nearby objects? A. Coherent power B. Brewster's power C. Polarization power D. Resolving power

Linear magnification

In optical system, what refers to the ratio of the image height to the object height? A. Linear magnification B. Object magnification C. Image magnification D. Height magnification

Angular magnification

In telescopes, what refers to the ratio between the angles subtended at the eye by the image and the angle subtended at the eye by the object seen directly? A. Magnifying power B. Linear magnification C. Angular magnification D. Object magnification

light is partially absorbed

In translucent material, A. light is able to pass through B. the refracted energy is absorbed within a very thin layer and converted to heat C. light is partially absorbed D. the reflected energy is absorbed within a thick layer and converted to heat

light is able to pass through

In transparent material, A. light is able to pass through B. the refracted energy is absorbed within a very thin layer and converted to heat C. light is partially absorbed D. the refracted energy is absorbed within a thick layer and converted to heat

Solids

In which medium do sound waves travel the faster? A. Liquids B. Solids C. Gases D. Vacuum

20 Hz

Infrasound refers to sounds whose frequencies are below _________. A. 20 Hz B. 30 Hz C. 40 Hz D. 50 Hz

Lattice Energy

It is the enthalpy change associated with the condensation of gaseous positive and negative ion into a crystal. a Raoult's Law b. Lattice Energy c. Enthalpy Of Solution d. Partition Coefficient

Tyndall Effect

It is the scattering of light by colloidal particles a. Mott Scaterring b. Tyndall Effect c. Rayleigh Scattering d. Wolf Effect

Amorphous

It refers to matter that do not have definite form or structure. a. Amorphous b. Morphous c. Transient d. Extrinsic

Refraction

Light ray that passes at an angle from one medium to another is deflected at the surface between the two media. What is this phenomenon called? A. Dispersion B. Reflection C. Refraction D. Incidence

1.0 candela

Lumen is defined as the luminous flux that falls on each square meter of a sphere 1 meter in radius at whose center is a ________ light source that radiates equally well in all directions. A. 0.1 candela B. 1.0 candela C. 10 candela D. 100 candela

lumen/m2

Lux is equivalent to which combination of units? A. lumen/cm2 B. lumen/ft2 C. lumen/m2 D. lumen/in2

volt/ampere

Ohm is equivalent to which of the following? A. coulomb/ampere B. watt/ampere C. volt/ampere D. joule/ampere

1.6 x 10 ^-19

One election volt is equivalent to _______ joules. A. 1.6 x 10^-17 B. 1.6 x 10^-18 C. 1.6 x 10 ^-19 D. 1.6 x 10^-20

746

One horsepower is equivalent to how many watts? A. 550 B. 746 C. 33,000 D. 250

hyperopia

One of the common defects of vision is ______ commonly known as farsightedness. A. hyporopia B. hyperopia C. myopia D. minorpia

myopia

One of the common defects of vision is _______ commonly known as nearsightedness. A. hyporopia B. hyperopia C. myopia D. minorpia

base

Substance having a pH level less than 7 a. acid b. base c. salt d. hydrate

Christian Johann Doppler

The "Doppler effect" is named after which scientist? A. Christopher Jacques Doppler B. Christian Jacques Doppler C. Christopher Jason Doppler D. Christian Johann Doppler

focal length of the lens to the effective aperture

The "f" number of the lens is the ration of the: A. focal length of the lens to the effective aperture B. effective aperture to the focal length of the lens C. magnifying power of lens to effective aperture D. effective aperture to magnifying power of the lens

work or energy

The "kilowatt-hour" is a unit of _______. A. work B. energy C. power D. work or energy

mass

The English unit "slug" is a unit of _______. A. mass B. weight C. force D. energy

torque

The _______ of a force about a particular axis is the product of the magnitude of the force and the perpendicular distance from the line of action of the force to the axis. A. inertia B. mass moment C. torque D. moment

average speed

The _______ of a moving object is the distance it covers in a time interval divided by the time interval. A. acceleration B. instantaneous speed C. average speed D. instantaneous velocity

luminous emittance

The _______ of the source is the luminous flux per unit area of the source. A. luminous emittance B. luminous efficiency C. luminous intensity D. illumination

kinetic energy

The ________ of a particle is equal to the total work that particle can do in the process of being brought to rest. A. kinetic energy B. potential energy C. total energy D. mechanical energy

moment of inertia

The _________ of a body about a given axis is the rotational analog of mass of the body is distributed about the axis. A. moment of mass B. moment of area C. moment of inertia D. torque

center of oscillation

The _________ of a pivotal object is that point at which it can be struck without producing a reaction force on its pivot. A. center of gravity B. center of oscillation C. axis of oscillation D. center of mass

energy density

The _________ of an electric field is the electric potential energy per unit volume associated with it. A. capacitance B. polar energy C. energy density D. dielectric distance

specific gravity

The __________ of a substance is its density relative to that of water? A. density B. weight density C. viscosity D. specific gravity

inversely proportional

The centripetal acceleration of a particle in uniform motion is _______ to the radius of its path. A. directly proportional B. inversely proportional C. equal D. not related in any way

directed toward the center of curvature of the path

The centripetal force is: A. directed away from the center of the curvature of the path B. directed toward the center of curvature of the path C. tangent to the curvature of the path D. either directed away or toward the center of curvature of the path

jointly to the colliding objects

The coefficient of restitution always applies _______. A. to only one of the colliding objects B. to neither of the colliding objects C. jointly to the colliding objects D. to the bigger colliding object

jointly to the colliding objects

The coefficient of restitution always applies _________. A. to only one of the colliding objects B. to neither of the colliding C. jointly to the colliding objects D. to the bigger colliding object

milligram

The mass of a grain of salt is in the order of _______. A. milligram B. gram C. microgram D. nanogram

Photoelectric effect

The emission of electrons from a metal surface when light shines on it is called _______. A. Absorption effect B. Spectrum emission C. Quantum effect D. Photoelectric effect

Law of inertia

The first law of motion is also known as ___________. A. Law of acceleration B. Law of inertia C. Law of interaction D. Law of momentum

refraction

The formation of rainbow in the sky is due to _______. A. diffraction B. reflection C. refraction D. diffusion

inversely as the square of

The gravitational force of the earth on an object varies of the ______ the distance of the object from the center of the earth. A. inversely as B. inversely as the square of C. directly as D. directly as the square of

Pascal's principle

The hydraulic press is an instrument which uses one of the following theorems. Which one? A. Bernoulli's energy theorem B. Pascal's principle C. Archimedes principle D. Reynold's principle

density of a liquid

The hydrometer is an instrument used to measure __________. A. pressure of a liquid B. density of a liquid C. Reynold's number D. viscosity of liquid

Archimedes principle

The hydrometer is an instrument which uses one of the following theorems. Which one? A. Bernoulli's energy theorem B. Pascal's principle C. Archimedes principle D. Reynold's principle

amplitude

The maximum displacement of an object undergoing harmonic motion on either side of its equilibrium position is called the _________ of the motion. A. frequency B. oscillation C. period D. amplitude

All of the above

The moment of inertia of an object is dependent on which of the following? A. The object's size and shape B. The object's mass C. The location of the axis of rotation D. All of the above

electromotive force

The potential difference across a battery, a generator or other source of electric energy when it is not connected to any external circuit is called its ________. A. electromechanical force B. electrostatic force C. electromotive force D. internal resistance

100,000

The pressure of 1 bar is equivalent to how many pascals? A. 1,000,000 B. 100,000 C. 10,000 D. D.1000

directly proportional to the square of the velocity

The range of the projectile is: A. directly proportional to the gravitational acceleration B. directly proportional to the square of the velocity C. directly proportional to the velocity D. inversely proportional to the velocity

intensity

The rate at which a wave of any kind carries energy per unit cross-sectional area is called ________. A. beats B. frequency C. gain D. intensity

acceleration

The rate at which velocity changes with time is known as ________. A. acceleration B. instantaneous speed C. average speed D. instantaneous velocity

Mach number

The ratio of a speed of an object and the speed of sound is called the _________. A. Wave factor B. Supersonic number C. Sonic number D. Mach number

relative index of refraction

The ratio of the speeds of light in two different media is known as ________. A. index of refraction B. index of diffraction C. relative index of refraction D. index of diffusion

directly proportional

The resolving power of an equal system is _________ the objective lens of the optical system? A. directly proportional B. inversely proportional C. equal D. not related to

equal to 0

The scalar product of two perpendicular vectors is always _______. A. equal to 1 B. greater than 1 C. less than 1 D. equal to 0

Law of acceleration

The second law of motion is also known as _________. A. Law of acceleration B. Law of inertia C. Law of interaction D. Law of momentum

elementary colors

The six colors of which sunlight is composed are called __________. A. secondary colors B. primary colors C. complementary colors D. elementary colors

micrometer

The size of some bacteria and living cells is in the order of _______. A. centimetre B. millimetre C. nanometer D. micrometer

nanometer

The size of the largest atom is in the order of ________. A. centimeter B. millimeter C. nanometer D. micrometer

Boyle's Law

The volume of a definite quantity of dry gas is inversely proportional to the pressure provided the temperature remains constant. a. Charles' Law b. Boyle's Law c. Gay-Lussac's Law d. Dalton's Law

342 m/s

The wavelength of a source wave in a certain material as measured is 18 cm. The frequency of the wave is 1900 Hz. Compute the speed of sound wave? A. 342 m/s B. 400 m/s C. 542 m/s D. 300 m/s

Boyle's Law

This law states that at constant temperature the volume of a sample of gas varies inversely with the pressure. a. Avogadro's Law b. Boyle's Law c. Charle's Law d. Gay-Lussac's Law

135.61 g/mole

Three grams of sulphur dissolved in 200 g of naphthalene C10H8, was found decreasing the freezing point of the solvent to 0.72 ⁰C. Find the molecular weight of the solute. (Kf C10H8 = 6.9 ⁰C/molar) a. 351.16 g/mole b. 115.32 g/mole c. 135.61 g/mole d. 151.23 g/mole

1.096

Two cars A and B are traveling toward each other at speeds of 45km/hr and 70 km/hr respectively. If A blowing its horn, what is the relative pitch heard by a passenger in B, considering that the velocity of sound is 344 m/s A. 1.043 B. 1.021 C. 1.096 D. 1.078

20,000 Hz

Ultrasound refers to sounds whose frequencies are above __________. A. 10,000 Hz B. 20,000 Hz C. 30,000 Hz D. 40,000 Hz

Unit vector

What is a vector with a magnitude of one and with no unit? A. Single vector B. Unit vector C. Dot vector D. Scalar vector

Vector

What is an arrowed line whose length is proportional to the magnitude of some vector quantity and whose direction is that of the quantity? A. Vector diagram B. Vector C. Component D. Resultant

X-rays

What are high-frequency electromagnetic waves emitted when fast electrons impinge on matter? A. Beta rays B. Alpha rays C. X-rays D. De Broglie waves

Colors which when combined produce white light

What are primary colors? A. Blue, Red and White B. Light colors C. Colors which when combined produce white light D. Blue, Red and Green

Phosphor

What coating material is used in the inside of the fluorescent lamp which emits visible light when it is excited by an ultraviolet radiation? A. Mercury B. Inert gas C. Phosphor D. Argon

Red

What color has the longest wavelength? A. Orange B. Red C. Yellow D. Green

Violet

What color has the shortest wavelength? A. Indigo B. Violet C. Blue D. Green

Absorption spectrum

What consists of various wavelengths of light absorbed by a substance when white light is passed through it? A. Excited spectrum B. Light spectrum C. Absorption spectrum D. Emission spectrum

Emission spectrum

What consists of various wavelengths of light emitted by an excited substance? A. Excited spectrum B. Light spectrum C. Absorption spectrum D. Emission spectrum

Laser

What device is used for producing a narrow, monochromatic, coherent beam of light? A. Spectral device B. Prism C. Fiber optic D. Laser

Mercury barometer

What device used to measure atmospheric pressure and is consists of a glass tube sealed at one end filled with mercury and a slide with a vernier scale? A. Bourdon gage B. Aneroid barometer C. Mercury barometer D. Manometer

These do not need a medium to travel in.

What do light, radiowaves, microwaves and X-rays have in common? A. These waves were predicted by only one person, James Maxwell. B. These do not need a medium to travel in. C. These waves are all mechanical waves. D. These waves are all serendipitous discoveries.

Light amplification by stimulated emission of radiation

What does LASER stands for? A. Light amplification by spectral emission of radiation B. Light amplification by state emission of radiation C. Light amplification by stimulated emission of radiation D. Light amplification by saturated emission of radiation

Sphygmomanometer

What instrument is used to measure blood pressure of human beings? A. Stropomanometer B. Pumpmanometer C. Electromanometer D. Sphygmomanometer

Hygrometer

What instrument is used to measure humidity of air? A. Hydrometer B. Hygrometer C. Lactometer D. Radiometer

Kinetic friction is always less than static friction

What is TRUE between kinetic friction and static friction? A. Kinetic friction is always to static friction B. Kinetic friction is always less than static friction C. Kinetic friction is always greater than static friction D. Kinetic friction is equal to or greater than static friction

Astigmatism

What is a defect of vision caused by the cornea having different curvatures in different planes? A. Astigmatism B. Myopia C. Hyperopia D. Presbyopia

Pyonometer

What is a glass bottle used to determine the specific gravity of liquids? A. Beaker B. Flask C. Pyonometer D. Graduated cylinder

Sound

What is a longitudinal wave phenomenon that results in periodic pressure variations? A. Sound B. Resonance C. Wave D. Beat

Mass

What is a measure of the inertia of an object? A. Density B. Weight C. Mass D. Force

Light with only one color and one wavelength

What is a monochromatic light? A. Light with only one color B. Light with only one wavelength C. Light with only one color and one wavelength D. Light with many colors

A proton or a neutron of an atom.

What is a nucleon? A. A proton in the nucleus of an atom. B. An electron in the nucleus of an atom. C. A neutron in the nucleus of an atom. D. A proton or a neutron of an atom.

Theory

What is a probable explanation for observe phenomena which is supported by abundant data? A. Theory B. Hypothesis C. Axiom D. Conclusion

Hologram

What is a three-dimensional image of an object illuminated by a broad band of coherent light? A. Hologram B. Polygram C. Opaque image D. Translucent image

Wavefront

What is an imaginary surface the joins points where all the waves from a source are in the same phase of oscillation? A. Gamma ray B. Wavefront C. Electromagnetic wave D. Microwave

Polariscope

What is an instrument used to determine the angle of rotation of the plane of polarized light? A. Polariscope B. Polarimeter C. Polargraph D. Polagraph

Mass spectrograph

What is an instrument used to determine the mass of atomic particles? A. Mass indicator B. Mass spectrograph C. Mass counter D. Mass technograph

Geiger effect

What is an instrumental used to detect and measure radioactivity? A. Edison counter B. Radioactive counter C. Fraunhofer counter D. Geiger effect

Dot product

What is another term for a scalar product of two vectors? A. Cross product B. Vector product C. Dot product D. Plus product

Sliding friction

What is another term for kinetic friction? A. Dynamic friction B. Starting friction C. Sliding friction D. All of the above

Relative density

What is another term for specific gravity? A. Density B. Weight density C. Relative density D. Viscosity

Cross product

What is another term for vector product of two vectors? A. Cross product B. Vector product C. Dot product D. Plus product

Kinetic energy

What is conserved in an elastic collision? A. Kinetic energy B. Potential energy C. Rest energy D. Mechanical energy

Force

What is defined as any influence that can change the velocity of an object? A. Impulse B. Force C. Energy D. Work

Meter

What is defined as the distance the light travels in a vacuum in 1/299,792,458 second? A. Yard B. Feet C. Meter D. Inch

Illumination

What is defined as the luminous flux per unit area? A. Luminous intensity B. Luminous efficiency C. Illumination D. Lumen

Density

What is defined as the mass per unit volume? A. Density B. Weight density C. Relative density D. Specific density

Power

What is defined as the time rate at which work is done? A. impulse B. Momentum C. Power D. Energy

Weight density

What is defined as the weight per unit volume? A. Density B. Weight density C. Relative density D. Specific density

It is the scattering of white light behind an obstruction.

What is diffraction? A. It is the scattering of white light behind an obstruction. B. It is the separation of white light into its component colors. C. It is the merging of component colors into white light. D. It is the absorption of white light in the atmosphere.

It is the separation of white light into its component colors.

What is dispersion? A. It is the scattering of white light behind an obstruction. B. It is the separation of white light into its component colors. C. It is the merging of component colors into white light. D. It is the absorption of white light in the atmosphere

Vector diagram

What is scaled drawing of the various forces, velocities or other vector quantities involved in the motion of a body? A. Vector diagram B. Vector C. Component D. Resultant

watt/m2

What is the SI unit of intensity? A. Joule/m2 B. kg/m2 C. N/m2 D. watt/m2

Candela

What is the SI unit of luminous intensity? A. Candela B. Lumens C. Lux D. Candlepower

Watt

What is the SI unit of power? A. Newton B. Watt C. Newton-Second D. Joule

Pa

What is the SI unit of pressure? A. Pa B. N-m C. N/m D. N-m/s

Kelvin

What is the SI unit of temperature? A. Fahrenheit B. Kelvin C. Celsius D. Rankine

Joule

What is the SI unit of work? A. Newton B. Watt C. Newton-Second D. Joule

22°

What is the angle of refraction of light as a beam of parallel light enters a block of ice at angle of incidence of 30°? The index of refraction of ice is 1.31 and that of air is 1.0. A. 45° B. 30° C. 22° D. 26°

1 candela

What is the approximate luminous intensity of a candle? A. 1 candela B. 1 flux C. 1 lumen D. All of the above

1.013 bar

What is the average pressure of the earth's atmosphere at sea level? A. 1.042 bar B. 1.021 bar C. 1.013 bar D. 1.037 bar

1

What is the coefficient of restitution for a perfectly elastic collision? A. 0 B. 1 C. Less than 1 D. Greater than 1

0

What is the coefficient of restitution for a perfectly inelastic collision? A. 0 B. 1 C. Less than 1 D. Greater than 1

Focal length

What is the distance from a lens to its focal point called? A. Focal index B. Focal factor C. Focal length D. All of the above

Rest energy

What is the energy something possesses by virtue of its mass? A. Kinetic energy B. Potential energy C. Rest energy D. Mechanical energy

Kinetic energy

What is the energy something possesses by virtue of its motion? A. Kinetic energy B. Potential energy C. Rest energy D. Mechanical energy

Potential energy

What is the energy something possesses by virtue of its position? A. Kinetic energy B. Potential energy C. Rest energy D. Mechanical energy

1.0003

What is the index of refraction of air? A. 1.3 B. 1.03 C. 1.003 D. 1.0003

1.33

What is the index of refraction of water? A. 1.33 B. 1.63 C. 1.43 D. 1.53

1

What is the intensity in W/m2 of the threshold of pain? A. 1 B. 10 C. 0.1 D. 0.01

10^-12

What is the intensity of the threshold of hearing in W/m2? A. 10^-12 B. 10^-10 C. 10^-8 D. 10^-6

Capacitance

What is the ratio between the charge on either plates of a capacitor and the potential difference between the plates? A. Resistance B. Inductance C. Capacitance D. Potential difference

94.8

What is the relative intensity level of sound in decibels it its intensity is 3 x 10-7 W/cm2? A. 94.8 B. 78.7 C. 80.5 D. 75.4

120 dB

What is the sound level of the threshold of pain? A. 100 dB B. 110 dB C. 120 dB D. 130 dB

447.5 m/s

What is the speed of sound in neon gas at temperature of 25°C considering that the molecular mass if this gas is 20.18 kg/mol? Neon is monoatomic. Use k = 1.67 A. 543.7 m/s B. 478.6 m/s C. 321.7 m/s D. 447.5 m/s

Kilogram

What is the standard unit of mass? A. Kilogram B. Pound C. Gram D. Newton

4π lm

What is the total luminous flux radiated by a 1 candela source? A. 2π lm B. 4π lm C. 8π lm D. π lm

Exchange force

What is the type of force which binds the protons and neutrons together in the nucleus of an atom? A. Drag force B. Bind force C. Exchange force D. Intact force

Farad

What is the unit of capacitance? A. Farad B. Weber C. Coulomb D. Gauss

Ampere

What is the unit of electric current? A. Volt B. Watt C. Ampere D. Coulomb

Lux

What is the unit of illumination? A. Lux B. Lumen C. Candela D. Lumen/watt

lumen/watt

What is the unit of luminous efficiency? A. lumen/watt B. lumen/volt C. lumen/ampere D. lumen/coulomb

Lumen

What is the unit of luminous flux? A. Candela B. Lumen C. Lux D. Footcandle

Candela

What is the unit of luminous intensity? A. Footcandle B. Lumen C. Candela D. Lux

Volt

What is the unit of potential difference? A. Watt B. Coulomb C. Volt D. Weber

Unitless

What is the unit of relative intensity? A. Pa B. N-m C. C.N-m/s D. Unitless

Ohm

What is the unit of resistance? A. Ohm B. Watt C. Volt D. Ampere

3 x 10^8

What is the velocity of light in meters per second? A. 3 x 10^6 B. 3 x 10^9 C. 3 x 10^7 D. 3 x 10^8

350 - 700

What is the wavelength band in nanometer of visible light? A. 350 - 700 B. 350 - 800 C. 300 - 700 D. 300 - 800

600 nm - 650 nm

What is the wavelength band of orange? A. 550 nm - 600 nm B. 600 nm - 650 nm C. 650 nm - 700 nm D. 500 nm - 550 nm

600 mm

What is the wavelength of yellow light whose frequency is 5 x 1014 Hz? A. 800 mm B. 200 mm C. 600 mm D. 700 mm

Quantum theory

What is unifying theory applicable to the divergent phenomena of light which assumes that the transfer of energy between light and matter occurs only in discrete quantities proportional to the frequency of the energy transferred? A. Quantum theory B. Radioactive theory C. Nuclear energy D. Quark energy

Convergent lens

What lens is commonly used to correct farsightedness? A. Magnifying lens B. Convergent lens C. Divergent lens D. Microscopic lens

Divergent lens

What lens is commonly used to correct nearsightedness? A. Magnifying lens B. Convergent lens C. Divergent lens D. Microscopic lens

Refraction

What makes the sun visible even before it is in the line with the horizon? A. Diffraction B. Reflection C. Refraction D. Diffusion

Longitudinal waves

What occur when the individual particles of a medium vibrate back and forth in the direction in which the waves travel? A. Longitudinal waves B. Transverse waves C. Wave motions D. Shock waves

Transverse waves

What occur when the individual particles of a medium vibrate from side to side perpendicular to the direction in which the waves travel? A. Longitudinal waves B. Transverse waves C. Wave motions D. Shock waves

Resonance

What occurs when periodic impulses are applied to a system and frequency equal to one of its natural frequencies of oscillation? A. Beat B. Resonance C. Doppler effect D. Shock wave

Constructive interference

What occurs when the resulting composite wave has amplitude greater than that of either of the original waves? A. Local interference B. Ordinary interference C. Constructive interference D. Destructive interference

Destructive interference

What occurs when the resulting composite wave has amplitude less than that of either of the original waves? A. Local interference B. Ordinary interference C. Constructive interference D. Destructive interference

Interference

What occurs when two waves combine so that one subtracts from the other? A. Interference B. Superposition C. Reinforcement D. Polarization

Cochlea

What part of the human ear where sound energy is converted into electrical energy? A. Ear drum B. Cochlea C. Tympanum D. Ear canal

Those particles whose angular speed changes

What particles will experience tangential acceleration? A. Those particles whose angular speed changes B. Those particles whose angular speed remains constant C. All particles D. Those particles whose angular speed is zero.

Color

What property of a light wave is determined by its wavelength? A. Color B. Shape C. Size D. Density

Frequency

What quantity is often used in describing harmonic motion? A. Amplitude B. Frequency C. Period D. Oscillation

Polaroid

What refers to an artificially made polarizing material that transmits light with only a single plane of polarization? A. Quartz B. Fiber optic C. Polaroid D. Tounnaline

Simple harmonic motion

What refers to an oscillatory motion that occurs whenever a restoring force acts on a body in the opposite direction to its displacement from its equilibrium position, with the magnitude of the restoring force proportional to the magnitude of the displacement? A. Damped harmonic motion B. Pendulum C. Simple harmonic motion D. Damped harmonic oscillation

Scalar quantities

What refers to physical quantities that are completely specified by just a number and a unit or physical quantities that have magnitudes only? A. Scalar quantities B. Vector product C. Dot product D. Vector quantities

Vector quantities

What refers to physical quantities that have a magnitude and a direction? A. Scalar quantities B. Vector quantities C. Dot product D. Vector quantities

Diffraction

What refers to the ability of waves to bend around the edges of obstacles in their paths? A. Coherence B. Reflection C. Refraction D. Diffraction

Solar spectrum

What refers to the band of colors produced when sunlight passes through a prism? A. Light spectrum B. Solar spectrum C. White spectrum D. Visible spectrum

Spectrum

What refers to the band of colors that emerges from the prism? A. Spectrum B. Luminance C. Facet D. Reflection

Luminous intensity

What refers to the brightness of a light source? A. Luminous intensity B. Illumination C. Luminous flux D. Luminous efficiency

Doppler effect

What refers to the change in frequency of a wave when there is relative motion between its source and an observer? A. Superposition principle B. Shock effect C. Doppler effect D. Wave motion

Chromatic aberration

What refers to the defect in lenses which causes unequal refraction of the different colors? A. Chromatic diffraction B. Chromatic polarization C. Chromatic aberration D. Chromatic dispersion

Dispersion

What refers to the effect when a beam containing more than one frequency is split into a corresponding number of different beams when it is refracted? A. Flux B. Refraction C. Reflection D. Dispersion

Edison effect

What refers to the emission of electrons from a heated metal in a vacuum? A. Geiger effect B. Edison effect C. Eddy current D. Fraunhofer effect

Retinal fatigue

What refers to the failure of one set of color receptors in the eye to be stimulated? A. Retinal failure B. Retinal fatigue C. Pupil imperfection D. Astigmatism

static friction

What refers to the force between two stationary surfaces in contact that prevents motion between them? A. kinetic friction B. sliding friction C. starting friction D. static friction

Centrifugal force

What refers to the force perpendicular to the velocity of an object moving along a curve path? A. Centrifugal force B. Centripetal force C. Reverse-effective force D. Gravitational force

Weight

What refers to the force with which the earth attracts an object? A. Gravitational pull B. Mass C. Weight D. All of the above

Harmonics

What refers to the fundamentals and the tones whose frequencies are whole number multiples of the fundamentals? A. Harmony B. Beats C. Treble and bass D. Harmonics

Relativity of mass

What refers to the increase in the measured mass of an object when it is moving relative to an observer? A. Exclusion principle B. Quantum theory of mass C. State of mass D. Relativity of mass

Ultraviolet light

What refers to the invisible electromagnetic waves shorter than the visible violet wave but longer than the Roentgen ray? A. Beta ray B. Ultraviolet light C. Alpha ray D. X-ray

half life

What refers to the length of time during which half of a given number of radioactive nuclei will disintegrate? A. active life B. half cycle C. half life D. half period

Fundamental

What refers to the lowest pitch produced by a musical tone source? A. Treble B. Bass C. Octave D. Fundamental

Luminous efficiency

What refers to the luminous flux emitted by a light source per watt of power input? A. Luminous factor B. Luminous efficiency C. Luminous intensity D. Illumination

Slug

What refers to the mass which is accelerated at the rate of one foot per second when acted on by a force of one pound? A. Slug B. Erg C. Dyne D. BTU

Dielectric constant

What refers to the measure of how effective a material is in reducing an electric field set up across a sample of it? A. Electronegativity B. Potential difference C. Dielectric constant D. Energy density

Umbra

What refers to the part of the shadow from which all light is excluded? A. Footprint B. Lumbra C. Umbra D. Sunspot

Impulse

What refers to the product of the force and the time during which a force acts? A. Impulse B. Momentum C. Power D. Energy

Translucent

What refers to the property of some media to transmit light wave in a diffused matter to make objects behind them undistinguishable? A. Lucidity B. Limpidity C. Transparent D. Translucent

Quality

What refers to the property of sound waves which depends on the number of harmonics present and on their prominence? A. Pitch B. Quality C. Harmonic D. Fundamental

Index of refraction

What refers to the ratio between the speed of light in free space and its speed in a particular medium? A. Index of refection B. Total internal reflection C. Index of dispersion D. Index of refraction

Loudness

What refers to the sensation in the ear which depends on the energy in the sound wave? A. Pitch B. Intensity C. Loudness D. Timbre

Longitudinal wave

What type of waves is produced in the stem when tuning fork? A. Transverse wave B. Longitudinal wave C. Neither transverse wave nor longitudinal wave D. Both transverse wave and longitudinal wave

Candela

What unit is defined in terms of the light emitted by a small pool of platinum at its melting point? A. Footcandle B. Candela C. Lux D. Lumen

It is lost to maximum value.

What will happen to the kinetic energy if it is a completely inelastic collision? A. It is conserved. B. It is lost to maximum value. C. It is gained from the loss of potential energy. D. It is lost to minimum value.

It will remain the same.

What will happen to the wavelength if the velocity and frequency of a wave are both reduced to one-half? A. It will double. B. It will reduce in half. C. It will quadruple. D. It will remain the same.

the number of sound waves you are sending out per second

When a person tells you that the pitch of your voice is high, he is referring to _________. A. the intensity of your voice B. the number of sound waves you are sending out per second C. the loudness of your voice D. the equality of your voice

When the two colliding objects stick together after impact.

When can we say that a collision is a completely inelastic collision? A. When the kinetic energy lost is minimum. B. When the kinetic energy is conserved. C. When the two colliding objects stick together after impact. D. When the two colliding objects will separate after impact.

translational equilibrium

When the forces that act on an object have a vector sum of zero, the object is said to be in _______. A. unstable equilibrium B. stable equilibrium C. rotational equilibrium D. translational equilibrium

rotational equilibrium

When the net torque acting on an object is zero, the object is in _______. A. unstable equilibrium B. stable equilibrium C. rotational equilibrium D. translational equilibrium

remains constant

When the vector sum of the external forces acting on the system of particles equals zero, the total linear momentum of the system __________. A. becomes zero B. maximizes C. changes abruptly D. remains constant

Red

When the white light is passed through a prism, the different lights are bent to varying degrees and are dispersed into different colors. Which of these colors bends the least? A. Violet B. Red C. Orange D. Green

Violet

When the white light is passed through a prism, the different lights are bent to varying degrees and are dispersed into different colors. Which of these colors bends the most? A. Violet B. Red C. Orange D. Green

It may sometimes be inside the object and sometimes outside the object.

Where is the center of gravity of an object located? A. It is always inside the object. B. It is always outside the object. C. It is always at its geometric center. D. It may sometimes be inside the object and sometimes outside the object.

A cone on its side.

Which of the following is an example of a neutral equilibrium? A. A cone balanced on its apex. B. A cone balanced on its base. C. A cone on its side. D. A cone balanced on the circumference of its base.

A cone balanced on its base.

Which of the following is an example of a stable equilibrium? A. A cone balanced on its apex. B. A cone balanced on its base. C. A cone on its side. D. A cone balanced on the circumference of its base.

Pitch

Which of the following is dependent upon the frequency of sound vibrations? A. Timbre B. Loudness C. Intensity D. Pitch

joule/coulomb

Which of the following is equivalent to a volt? A. watt/coulomb B. joule/coulomb C. joule/watt D. watt/joule

coulomb/second

Which of the following is equivalent to the unit "ampere"? A. joule/second B. volt/second C. coulomb/second D. watt/second

lumen/steradian

Which of the following is equivalent to the unit "candela"? A. lumen/m2 B. footcandle/steradian C. lux/steradian D. lumen/steradian

coulomb/volt

Which of the following is equivalent to the unit "farad"? A. coulomb/volt B. joule/volt C. joule/coulomb D. coulomb/joule

It may be outside the object

Which of the following statements about center of gravity is TRUE? A. It may be outside the object B. It is always at its geometrical center C. It is always in the interior of the object D. It is sometimes arbitrary

A high-frequency sound has high pitch.

Which of the following statements is TRUE? A. A high-frequency sound has high pitch. B. A high-frequency sound has low pitch. C. A high-frequency sound has low energy. D. A high-frequency sound has low pitch and low energy.

It has one concave surface and one convex surface

Which one best describes the meniscus lens? A. It has only concave surfaces. B. It has only convex surfaces. C. it has no concave surface and no convex surface. D. It has one concave surface and one convex surface

N/m2

Which one is equivalent of the unit "Pascal'? A. N/nm2 B. N/m2 C. N/m D. D.N/nm

Newton-meter per second

Which one is equivalent to the unit "watt"? A. Newton-second B. Newton-meter C. Newton-meter per second D. Newton-meter per second squared

Newton-meter

Which one is equivalent to the unit 'joule'? A. Newton-second B. Newton-meter C. Newton-meter per second D. Newton-meter per second squared

Maxwell

Who predicted the existence of electromagnetic waves in 1865? A. Roentgen B. Maxwell C. Tesla D. Doppler

Hertz

Who provide evidence that light and electromagnetic waves have the same nature and that they travel at the same speed and exhibit the same properties such as refraction, reflection and interference? A. Townes B. Maxwell C. Hertz D. Huygens

Because water has greater bulk modulus than air.

Why is sound wave travel faster in water than in air? A. Because water has greater density than air. B. Because water has greater bulk modulus than air. C. Because water has more in terms of number of molecules than air. D. Because water has more in volume than air.

Force and displacement

Work is defined as the product of: A. Force and displacement B. Force and time C. Displacement and time D. Power and time