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Physics Study Guide

Total questions: 84

Worksheet time: 42mins

Name
Class
Date
1.

The loudness of a sound is most closely related to its

a)

speed

b)

frequency

c)

wavelength

d)

intensity

2.

The source of every sound is something that is

a)

vibrating

b)

moving

c)

accelerating

d)

undergoing simple harmonic motion

e)

a net emitter of energy

3.

A high-frequency sound source produces a high


a)

speed

b)

amplitude

c)

pitch

d)

all of the above

e)

none of the above

4.

  A wiggle in time is a


a)

vibration

b)

wave

c)

both of these

d)

neither of these

5.

   If the mass of an object were doubled while its volume remained the same, its density would

a)

be half

b)

double

c)

stay the same

d)

be four times as great

6.

Which of these relate most to the loudness of sound?

a)

wavelength

b)

frequency

c)

speed

d)

amplitude

e)

all of the above

7.

A wave of frequency of 1000 hertz vibrates at

a)

less than 1000 cycles per second

b)

1000 cycles per second

c)

more than 1000 cycles per second

d)

none of the above

8.

    Sound travels fastest in

a)

air

b)

water

c)

steel

d)

a vacuum

9.

  The speed of sound depends on

a)

its frequency

b)

its amplitude

c)

the medium in which it travels

d)

all of the above

e)

none of the above

10.

In choosing between sound waves and radio waves, which has the greater speed?

a)

sound wave

b)

radio wave

c)

both the same

d)

need more information

11.

Compressions and rarefactions are characteristics of

a)

longitudinal waves

b)

transverse waves

c)

both of these

d)

need more information

12.

Compressions and rarefactions normally travel in

a)

the same direction in a wave

b)

opposite direction in a wave

c)

right angles to the wave direction

d)

none of the above

13.

.  The kind of waves that travel fastest through a long metal rod have

a)

short wavelengths

b)

waves of medium length

c)

long wavelengths

d)

all have the same speed

14.

Some of a wave's energy dissipates as heat. In time, this will reduce the wave's

a)

speed

b)

wavelength

c)

amplitude

d)

frequency

e)

period

15.

When you stand with only one of your feet on a weighing scale, the scale reading is


a)

half

b)

the same as with both feet

c)

doubled

d)

none of the above

16.

Water pressure on a submerged object is greatest against its


a)

top

b)

bottom

c)

sides

d)

same against all surfaces

e)

none of the above

17.

A dam is thicker at the bottom than at the top mainly because


a)

 water is denser at deeper levels.


b)

 water pressure increases with depth.


c)

surface tension exists only on the surface of liquids.


d)

it looks better

e)

none of the above

18.

.  Which will remain the same for two identical books, one lying flat and the other standing on an end?


a)

weight

b)

pressure

c)

both of these

d)

neither of these

19.

A 340-hertz sound wave travels at 340 m/s in air with a wavelength of


a)

1 m.

b)

10 m.

c)

100 m.

d)

1000 m.

e)

none of the above

20.

  The pressure in a liquid depends on liquid


a)

density

b)

depth

c)

both of these

d)

neither of these

21.

Sound travel fastest in


a)

water vapor

b)

water

c)

ice

d)

steam

e)

all of the above

22.

The speed of a sound wave in air depends on


a)

its frequency

b)

its wavelength

c)

air temperature

d)

all of the above

e)

none of the above

23.

  The pressure at the bottom of a jug filled with water does NOT depend on


a)

the acceleration due to gravity


b)

water density

c)

the height of the liquid

d)

surface area of the water

e)

none of the above

24.

Repeatedly dipping your fingers into water produces waves. Increasing the frequency of dipping produces waves that are


a)

shorter

b)

longer

c)

the same

25.

  Sound travels faster in air if the air temperature is


a)

warm

b)

cold

c)

average

d)

any of the above

26.

The speed of sound in air is greatest for


a)

high frequencies

b)

low frequencies

c)

same for all frequencies

27.

.  Buoyant force acts upward on a submerged object because


a)

it acts in a direction to oppose gravity

b)

the weight of fluid displaced reacts with an upward force

c)

pressure against its bottom is greater than pressure against its top

d)

none of the above

28.

  An explosion occurs 34 km away. The time it takes for its sound to reach your ears, traveling at 340 m/s, is

a)

0.1 s.

b)

1 s.

c)

10 s.

d)

20 s.

e)

more than 20 s.

29.

An acoustical engineer in designing a music hall is concerned with


a)

echoes

b)

reflection

c)

reverberations

d)

all of the above

e)

none of the above

30.

  A completely submerged object always displaces its own


a)

volume of fluid

b)

weight of fluid

c)

density of fluid

d)

all of the above

e)

none of the above

31.

The explanation for refraction must involve a change in


a)

frequency

b)

wavelength

c)

speed

d)

all of the above

e)

none of the above

32.

Refraction of sound can occur in


a)

air

b)

water

c)

both of these

d)

neither of these

33.

Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 100 megahertz is


a)

0.3 m.

b)

3.0 m.

c)

30 m.

d)

300 m.

e)

none of the above

34.

The compressions and rarefactions in a longitudinal wave travel in


a)

the same direction

b)

opposite direction

c)

a vacuum

35.

Sound refraction can occur when the speed of sound


a)

remains constant

b)

changes

c)

ranger below supersonic

d)

none of the above

36.

The buoyant force on an object is least when the object is


a)

partly submerged

b)

submerged near the surface

c)

submerged near the bottom

d)

none of the above

37.

Which of these is affected by mass?


a)

a freely-falling object

b)

an object sliding down a friction-free plane

c)

a pendulum

d)

all of the above

e)

none of the above

38.

The vibrations of a transverse wave move


a)

along the direction of wave travel

b)

at right angles to the direction of wave travel

c)

that changes with speed

39.

As a high-altitude balloon rises higher into the atmosphere, it undergoes a decrease in


a)

volume

b)

density

c)

weight

d)

mass

e)

none of the above

40.

  If you double the frequency of a vibrating object, its period


a)

doubles

b)

halves

c)

is quartered

41.

An object that completes 10 vibrations in 20 seconds has a frequency of


a)

0.5 hertz

b)

2 hertz

c)

200 hertz

42.

An object that completes 100 vibrations in 5 seconds has a period of


a)

0.5 second

b)

1 second

c)

2 seconds

d)

none of the above

43.

Which equation is correct for wave speed?


a)

 wave speed = frequency x wavelength


b)

wave speed = (1/period) x wavelength


c)

both of these


d)

 neither of these


44.

The vibrations of a longitudinal wave move


a)

along the direction of wave travel

b)

at right angles to the direction of wave travel

c)

that changes with speed

45.

A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is


a)

0.5 hertz

b)

1 hertz

c)

2 hertz

d)

none of these

46.

The frequency of the second hand on a clock is


a)

1 hertz

b)

1/60 hertz

c)

60 hertz

d)

3600 hertz

47.

  The distance traveled by a wave during a single period is


a)

 one-half wavelength.


b)

one wavelength.


c)

 two wavelengths.


d)

 none of the above


48.

  Interference is a property of


a)

sound waves

b)

water waves

c)

light waves

d)

all of the above

e)

none of the above

49.

When an object is partly or wholly immersed in a liquid, it is buoyed up


a)

by a force equal to its own weight.


b)

by a force equal to the weight of liquid displaced.


c)

 and floats in accord with Archimedes' principle.


d)

all of the above


e)

 none of the above



50.

  Atmospheric pressure is caused by the


a)

density of the atmosphere

b)

weight of the atmosphere

c)

temperature of the atmosphere

d)

solar energy on the atmosphere

51.

  In drinking soda or water through a straw, we make use of


a)

capillary action

b)

surface tension

c)

atmospheric pressure

d)

Bernoulli's principle

e)

none of the above

52.

If you stand on a weighing scale and suddenly the atmosphere vanishes, taking buoyancy into account, the scale reading


a)

increases

b)

decreases

c)

remains the same

d)

quickly reduces to zero

53.

  Room temperature on the Kelvin scale is about


a)

100 K.

b)

200 K.

c)

300 K.

d)

400 K.

e)

more than 400 K.

54.

When you touch a cold piece of ice with your finger, energy flows


a)

from your finger to the ice

b)

from the ice to your finger

c)

actually, both ways

55.

  When you touch a hot potato with your finger, energy flows


a)

from your finger to the potato

b)

from the potato to your finger

c)

actually, both ways

56.

When a gas in a container is squeezed to half its volume, its density


a)

halves

b)

doubles

c)

quadruples

d)

remains the same

57.

A bubble of air released from the bottom of a lake


a)

 rises to the top at constant volume.


b)

 becomes smaller as it rises.


c)

becomes larger as it rises.


d)

 alternately expands and contracts as it rises.


e)

 none of the above


58.

.  An object in a vacuum has no


a)

buoyant force

b)

mass

c)

weight

d)

temperature

e)

all of the above

59.

To say that one wave is out of phase with another is to say that the waves are


a)

 of different amplitudes.

b)

 of different frequencies.


c)

of different wavelengths.


d)

out of step.


e)

 all of the above


60.

A substance with a high thermal inertia has a high


a)

temperature, in many cases.


b)

heat conductivity.


c)

 specific heat capacity.


d)

 energy content.


61.

Wave interference occurs for


a)

sound waves

b)

light waves

c)

water waves

d)

all of the above

e)

none of the above

62.

  A standing wave is likely produced when


a)

 two waves overlap.


b)

a wave reflects upon itself.


c)

 the speed of the wave is zero or near zero

d)

the amplitude of a wave exceeds its wavelength.


63.

  A node is a position of


a)

minimum amplitude.

b)

 maximum amplitude.


c)

 half amplitude.


64.

  A Doppler effect occurs when a source of sound moves


a)

towards you

b)

away from you

c)

either of these

d)

neither of these

65.

The buoyant force of the atmosphere on a body is equal to the


a)

 weight of air displaced.


b)

volume of air displaced.


c)

mass of the air displaced.


d)

 all of the above


e)

none of the above


66.

The buoyant force acting on a 10-ton ship floating in the ocean is


a)

less than 10 tons

b)

10 tons

c)

more than 10 tons

d)

depends in density of sea water

67.

Which of the following normally warms up fastest when heat is applied?


a)

water

b)

iron

c)

wood

d)

all of the above

68.

.  A substance that cools down faster than others has a


a)

low specific heat capacity.


b)

high specific heat capacity.


c)

 either of these


d)

 neither of these


69.

Heat energy travels from an object with a high


a)

 internal energy to an object with a lower internal energy.


b)

 temperature to an object with a lower temperature.


c)

 both of the above


d)

 none of the above


70.

A red shift for light indicates that the light source is moving


a)

toward you

b)

away from you

c)

both of these

d)

neither of these

71.

A blue shift for light indicates that the light source is moving


a)

toward you

b)

away from you

c)

both of these

d)

neither of theses

72.

  The volume of water displaced by a floating 20-ton boat


a)

 is 20 cubic meters.


b)

is the volume of 20 tons of water.


c)

 is the volume of the boat.


d)

depends on the shape of the ship's hull.


e)

 none of the above


73.

When you touch a nail stuck in ice, energy flows from


a)

the ice to your hand

b)

your hand to the ice

c)

both of these

d)

neither of these

74.

As a high-altitude balloon sinks lower into the atmosphere, it undergoes a decrease in


a)

volume

b)

density

c)

weight

d)

mass

e)

none of the above

75.

When an iron ring is heated, the hole becomes


a)

smaller

b)

larger

c)

neither smaller nor larger

d)

either smaller or larger, depending on the ring thickness

76.

When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. The reason for this is


a)

 iron gets hotter before copper.


b)

 copper gets hotter before iron.


c)

 copper expands more than iron.


d)

 iron expands more than copper.


e)

 none of the above


77.

.  If you measure the distance between two telephone poles with a steel tape on a very hot day, your measured distance will be


a)

a bit short

b)

a bit long

c)

the same as on an average temperature day

78.

  If the temperature of a sample of water at 4°C is slightly increased, its volume


a)

increases

b)

decreases

c)

remains the same

79.

When water at 4°C is heated it expands. If it is instead cooled it will


a)

contracts

b)

also expand

c)

neither contracts nor expnds

80.

.  Which of these are good insulators?


a)

feathers

b)

wood

c)

snow

d)

all of the above

e)

none of the above

81.

The form of heat transfer that doesn't depend on a medium is


a)

conduction

b)

convection

c)

radiation

d)

all of the above

82.

Wood is a poor conductor


a)

when it is cold

b)

at common room temperature

c)

when it is hot

d)

all of the above

e)

none of the above

83.

  Energy transfer by convection is primarily restricted to


a)

solids

b)

liquids

c)

gases

d)

fluids

e)

none of the above

84.

A good reflector of radiation is a


a)

good absorber of radiation.


b)

 good emitter of radiation.


c)

poor absorber of radiation.


d)

none of the above


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