GES 105

An Earth satellite is an elliptical orbit travels faster when it is

-Nearest Earth - Farthest from the earth Answer is neither of these

The support force on a 10-N book that rests on a horizontal surface is

10N

When you move a bar magnet to and fro, first thrusting it into, and then withdrawing it from, a coil of wire, you induce

Alternating current

The loudness of a sound is most closely related to its

Amplitude

Heat energy travels from

An object that has a higher temperature to an object with a lower temperature.

When evaporation occurs in a dish of water, the molecules left behind in the water

Are less energetic, have decreased average speeds & results in lowered temperature

When we say electric charge is conserved, we mean that it can be

Be neither created or destroyed

Thermal energy is normally measured in units of

Calories and joules

What statement is correct?

Charge flows in a circuit.

Water at 4°C will expand when it is slightly

Cooled and warmed

The specific heat capacity for aluminum is more than twice that of copper. If equal quantities of heat are given to equal masses of aluminum and copper, the metal that more rapidly increases in temperature is

Copper

When you double the voltage in a simple electric circuit, you double the

Current

Boiling and freezing can occur at the same time when water is subjected to

Decreased atmospheric pressure

Surrounding moving electric charges are

Electric fields and magnetic fields

An electric field surrounds all

Electrons and protons

The essential physics concept in the operation of an electric generator is

Faraday's Law

Thermal convection is linked most closely to

Fluids

Which of these forms of energy is not renewable?

Fossil fuels

When air rapidly compressed, its temperature normally

Increases

When we consider the time it takes for a pendulum to swing to and fro, we're talking about the pendulum's

Period

A magnetic force acts most strongly on a current carrying wire when it is

Perpendicular to the magnetic field

The vibrations along a transverse wave move

Perpendicular to the wave direction of motion

A fire walker walking barefoot across hot wooden coals depends on wood's

Poor conduction

When you double both the current and the voltage in a circuit, the power

Quadruples

A bimetallic strip used in thermostats relies on the fact that different metals have different

Rates of thermal expansion

A common example of a longitudinal wave is

Sound

Which does not belonging the family of electromagnetic waves?

Sound

The explanation for the refraction of sound must involve a change in

Speed

The speed of sound varies with

Temperature

The source of all magnetism is

The motion of electrons

Which two laws of thermodynamics are statement of what doesn't happen

The second and the third

Wave interference occurs in

Transverse waves and longitudinal waves

A step-up transformer is an electric circuit can step up

Voltage

Which has the greatest kinetic energy?

a car of half the mass traveling at 60 kn/h

Aristotle treated motion by

dividing it into two classes

A freight train rolls along a track with considerable momentum. If it rolls at the same speed but has twice as much mass, its momentum is

doubled

When a ball increases in speed by the same amount each second, its acceleration

is constant

According to Newton, the greater distance between gravitationally interacting objects, the

less the gravitational force between them

Electricity and magnetism connect to form

light

Aristotle believed that natural laws could be understood by

logic

In science, facts

may change

If you push for an hour against a stationary wall, you do no work

on the wall

A scientific hypothesis can be disproved with

one reproducible experiment

Newton discovered

that gravity is universal

A quick jerk on a sheet of paper beneath a box of cereal doesn't topple the box, which best illustrates this

the box has inertia

The net force of an object is

the combination of all forces acting on it

When Marie pushes her desk to the right, friction between the floor and the desk acts toward

the left

An outcome of universal gravitation is that

-is provided prediction and discovery of planets -planets aren't cubes with sharp corners -its discovery prompted other laws of nature Answer= all of these

When an apple that weighs 1 N is held at rest above your head, the net force on the apple is

0 N

A machine puts out 100 W of power for every 1000 W put into it. The efficiency of the machine is

10%

Escape speed from Earth is

11.2 km/s

What is the power rating of a lamp connected to a 12-V source when it carries 2.5 A?

30W

What is the force of gravity on a 500-N woman standing on Earths surface?

500 N

The principle underlying the operation of an electric motor is that

A current-carrying wire experiences force in a magnetic field

Your garage gets messier day by day. In this case entropy is

Increasing

Noise-cancelling devices such as jackhammer earphones make use of sound

Interference

Microscopic slush in water tends to make the water

Less dense

Compared with terrestrial radiation, the radiation from the does not Sun have

Longer wavelength, lower frequency

The language of Science is

Mathematics

In a simple circuit consisting of a single lamp and a single battery, when the current in the lamp is 2 amperes (A), the current in the battery is

More than 2A

When a 134-Hz tuning fork and a 144-Hz tuning fork are struck, the beat frequency is

More than 8HZ

Absolute zero corresponds to a temperature of

OK and -273degrees C

The equilibrium rule EF=0 applies to

Objects or systems in uniform motion in a straight line & objects or systems at rest

Electric potential and electric potential energy are not

One in the same in most cases, two terms for the Same concept

A magnetic force acting on a beam of electrons can change

Only the direction of the beam

Glass is transparent to short-wavelength light and is

Opaque to light of longer wavelengths

When steam changes phase to water, it

Releases energy

Which has the greater momentum when moving?

a container ship, a bullet= either of these are correct depending on speed

A dropped ball gains speed because

a gravitational force acts on it.

If the mass of an object does not change, a constant net force on the object produces constant

acceleration

Newton's second law focuses on

acceleration

A sonic boom can NOT be produced by

an aircraft flying slower than the speed of sound.

Which of these is a scientific hypothesis (that could be proved wrong)?

an atom is the smallest bit of matter in a material

In the absence of external forces, momentum is conserved in

either an elastic or an inelastic collision

Success in science is mainly linked to emphasis on

experiments

According to Galileo, inertia is

force like any other object

An Earth satellite is simply a projectile

freely falling around Earth

The scientific method is most effective in

gaining, organizing, and applying new knowledge

When a scientists is dishonest and reports false information, he or she

gets no second chance in the scientific community

A heave truck and a small car roll down a hill at the same speed and need to stop in the same amount of time. Compared with the force to stop the car, the force needed to stop the truck is

greater

Scientific Equations in a conceptual course are mainly

guides to thinking about the relationships between concepts

In science, an educated guess is a

hypothesis

If an objects mass decreases while constant force acts on it, acceleration

increases

Science greatly advanced when Galileo favored

philosophical discussions

Inertia is defined as

property of matter

The circular path of a satellite orbiting Earth is characterized by a constant

radial distance

An object that absorbs energy well also

radiates well

Planet Earth loses heat primarily by

radiation

Action and reaction forces are parts of

single interaction

A ball rolling down an incline has its maximum potential energy at

the top

The synthesis of a large collection of information that contains well-tested and verified hypothesis about certain aspects of the world is known as a scientific

theory

The distance between impulse and force involves the

time and force acts

The emphasis of the orange-and-apple sequence in you text is

to define systems

The motion of molecules that most affects temperature is

translational motion

A freight train rolls along a track with considerable momentum. If it then rolls at the same speed but has twice as much mass, its momentum is now

twice as large

When you ride your scooter you have momentum. When you ride twice as fast you have

twice the momentum

You cannot exert a force on a wall

unless the wall simultaneously exerts the same force on you.

Between mass and weight, the more fundamental quantity is

weight

An object in motion tends to remain in motion

without the need of force

Your weight is defined to be the force

you exert against a supporting surface