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