Physics #3

11) A pair of sunglasses and a pair of clear reading glasses are left in the sunlight. The hotter glasses will be the A) sunglasses. B) reading glasses. C) both of these D) neither of these

A

17) The amplitude of a wave is 1 meter. The crest-to-trough distance of the wave is A)2 M B) 0.5 m. C) 1 M D) none of the above

A

22) Which of these is a transverse wave? A) a radio wave B) a sound wave C) a Slinky shaken to and fro D) All the above D) none of the above

A

23) If the Sun were to disappear at this moment, we wouldn't know about it for: A) 8 minutes. B) 8 hours. C) 8 seconds. D) 7 seconds, reflex time.

A

24) Sound travels fastest in A) steel. B) air. C) a vacuum. D) water.

A

27) A wave of frequency of 1000 hertz vibrates at A) 1000 cycles per second. B) less than 1000 cycles per second. C) more than 1000 cycles per second. D) none of the above

A

30) Sound waves cannot travel in A) a vacuum. B) steel. C) air. D) water.

A

36) Compressions and rarefactions are characteristics of A) longitudinal waves. B) both of these C) transverse waves. D) need more information

A

38) In air and in water the same sound travels with different: A) speeds B) Frequencies C) Both of these D)Neither of these

A

39) The frequencies of sound that carry farther in air are: A) low. B) ultrasonic. C) high. D) none of the above

A

40) The source of every sound is something that is A) vibrating. B)undergoing simple harmonic motion. C) moving. D) a net emitter of energy. E) accelerating.

A

43) Sound travels faster in air if the air temperature is: A) warm. B) average. C) cold. D) any of the above

A

A 1-meter-long pendulum has a bob with a mass of 1 kg. Suppose that the bob is now tied to a different string so that the length of the pendulum is now 2 m. How will the period of the pendulum change? A.It will increase. B.It will decrease. C.It will remain the same. D.There is not enough information.

A

A diver shines light upward to the surface of a smooth pond at 200 to the normal. Most light passes into the air above while the part that reflects back into the water makes an angle to the normal of: A) 200. B) all refracts, none reflects. C) less than 200. D) more than 200 .

A

A standing wave is likely produced when A) a wave reflects upon itself. B) the amplitude of a wave exceeds its wavelength. C) two waves overlap. D) the speed of the wave is zero or near zero.

A

If you double the frequency of a vibrating object, its period A) halves. B) is quartered. C) doubles

A

Light refracts when traveling from air into glass because of a change in light's: A) speed. B) intensity. C) frequency. D) all of the above E) none of the above

A

Materials generally become warmer when light is: A) absorbed by them. B) transmitted by them. C) reflected by them. D) all of the above E) none of the above

A

Refraction results from differences in light's: A) speed. B) incident angles. C) frequency. D) all of the above E) none of the above

A

Some of a wave's energy dissipates as heat. In time, this will. reduce the wavers: A) amplitude. B) period. C) wavelength. D) frequency. E) speed.

A

Sunburns are produced by: A) ultraviolet light. B) infrared light. C) visible light. D) all of the above E) none of the above

A

The frequency of the second hand on a clock is A) 1/60 hertz. B) 1 hertz. C) 60 hertz.

A

The natural frequency of the atoms in glass is in the A) ultraviolet part of the spectrum. B) infrared part of the spectrum. C) visible part of the spectrum.

A

When a light ray passes at a non-90 angle from water into air, it: A) bends away from the normal. B) bends toward the normal. C) travels much slower.

A

When air near the ground on a warm day is warmed more than the air above, sound tends to bend: A.upward.B.downward. C.at right angles to the ground.D.None of the above.

A

Which best shields you from sunburn when at the beach? A) a sheet of glass between you and the Sun B) a cloudy day C) frequent turning of your body D) all of the above E) none of the above

A

Which of the following is fundamentally different from the others? A) sound waves B) gamma rays C) light waves D) radio waves E) X-rays

A

Which of these electromagnetic waves have the shortest wavelength? A) X-rays B) radio waves C) light waves D) infrared waves E) ultraviolet waves

A

You watch a person chopping wood and note that after the last chop you hear it 1 second later. How far away is the chopper? A.330 mB.More than 330 mC.Less than 330 mD.There's no way to tell.

A

) A 60-vibration-per-second wave travels 30 meters in 1 second, Its frequency is A) 1800 hertz and it travels at 2 m/s, B) 60 hertz and it travels at 30 m/s. C) 30 hertz and it travels at 60 m/s. D) none of the above

B

1) A wiggle in time is a A) wave. B) vibration. C) both of these D) neither of these

B

1) Most of the waves in the electromagnetic spectrum are A) red light. B) invisible. C) green light. D) blue light.

B

19) Compared to radio waves, the velocity of visible light waves in a vacuum is A) less. B) the same. C) more.

B

2) A wiggle in both space and time is a A) vibration. B) wave. C) both of these D) neither of these

B

20) Which of these electromagnetic waves have the longest wavelength? A) X-rays B) radio waves C) ultraviolet waves D) light waves E) infrared waves

B

23) A sound wave is a A) transverse wave. B) longitudinal wave. C) all of the above D) none of the above

B

28) A high-frequency sound source produces a high A) speed. B) pitch. C) amplitude. D) all of the above E) none of the above

B

32) The speed of a sound wave in air depends on: A) its amplitude. B) its frequency. C) its wavelength. D) all of the above E) none of the above 32)

B

34) A 340-hertz sound wave travels at 340 m/s in air with a wavelength of: A) 100 m. B) 1 m C) 10 m. D) 1000 m. E) none of the above

B

35) Compressions and rarefactions normally travel in: A) opposite directions in a wave. B) the same direction in a wave. C) right angles to the wave direction. D) none of the above

B

40) When a light beam emerges from water into air, light speed A) remains the same. B) increases. C) decreases.

B

41) The explanation for refraction must involve a change in: A) frequency. B) speed. C) wavelength. D) all of the above E) none of the above

B

8) The pendulum with the greatest frequency is one with the A) longest length. B) shortest length. C) neither of these

B

A changing electric field induces a changing A) electromagnetic field. B) magnetic field. C) both of these D) neither of these

B

A main difference between a radio wave and a sound wave is: A) energy. B) medium or no medium. C) amplitude. D) frequency. E) wavelength.

B

A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is A) 2 hertz. B) 0.5 hertz. C) 1 hertz. D) none of the above

B

In choosing between sound waves and radio waves, which has the greater speed? A) both the same B) radio wave C) sound wave D) need more information

B

In the evening, when air directly above a pond is cooler than air above, sound across a pond tends to bend: A.upward.B.downward. C.at right angles to the ground.D.None of the above.

B

Repeatedly dipping your fingers into water produces waves. Increasing the frequency of dipping produces waves that are A) the same. B) shorter. C) longer.

B

Reverberations are best heard when you sing in a room with: A.carpeted walls.B.hard-surfaced walls. C.open windows.D.None of the above.

B

The frequency of a certain wave is 10 hertz and its period is A) 100 seconds. B) 0.1 second. C) 10 seconds. D) none of the above

B

The frequency of a simple pendulum does NOT depend on: A) its length. B) its mass. C) the acceleration due to gravity. D) all of the above E) none of the above

B

The source of all electromagnetic waves is: A) changes in atomic energy levels. B) accelerating electric charges. C) vibrating atoms and molecules. D) crystalline fluctuations. E) none of the above

B

The source of all waves is: A) energy. B) something that vibrates. C) a force of some kind. D) all of the above E) none of the above

B

The vibrations along a transverse wave move in a direction: A.along the wave.B.perpendicular to the wave. C.Both A and B. D.Neither A nor B.

B

When visible light is incident upon clear glass, atoms in the glass: A) resonate. B) are forced into vibration. C) convert the light energy into internal energy.

B

Which signal will be heard first? A.Radio signal B.Nonbroadcast sound signal C.Both at the same time. D.None of the above.

B

You hear thunder 2 seconds after you see a lightning flash. How far away is the lightning? A.340 m/sB.660 m/sC.More than 660 m/sD.There's no way to tell.

B

Your image in a plane mirror is: A) real. B) virtual. C) both of these D) neither of these

B

10) An object that completes 20 vibrations in 10 seconds has a frequency of A) 200 hertz. B) 0.5 hertz. C) 2 hertz. D) I hertz.

C

10) Glass is transparent to A) infrared light. B) ultraviolet light. C) visible light. D) all of the above

C

18) A main difference between a radio wave and a light wave is: A) wavelength. B) frequency. C) both of these D) neither of these

C

26) The approximate range of human hearing is: A) 40 hertz to 40,000 hertz. B) 10 hertz to 10,000 hertz. C) 20 hertz to 20,000 hertz. D) none of the above

C

31) The speed of sound depends on A) its amplitude. B) its frequency. C) the medium in which it travels. D) all of the above E) none of the above

C

33) Light travels fastest in A) cool air. B) warm air. C) a vacuum.

C

37) The critical angle is least in: A) water, B) glass, C) diamond, D) vacuum.

C

41) The critical angle for a transparent material is the angle at and beyond which all light within the material at its upper surface is: A) diffused, B) refracted. C) reflected. D) dispersed. E) absorbed.

C

42) An explosion occurs 34 km away. The fime it takes for its sound to reach your ears, traveling at 340 m/s, is: A) 0.1 s. B) 20 s. C) more than 20 s, D) 1 s E) 10 s

C

44) When sunlight illuminates a page from your Conceptual Physics book it: A) reflects most of it. B) absorbs at the text lettering. C) both of these D) neither of these

C

6) When an elevator is accelerating upward, the frequency of a pendulum inside A) decreases. B) doesn't change. C) increases.

C

7) Which of the following cannot travel in a vacuum? A) a light wave B) a radio wave C) a sound wave D) all can E) none can

C

8) Compared to its average speed in air, the average speed of a beam of light in glass is: A) the same. B) more. C) less.

C

A 1-meter-long pendulum has a bob with a mass of 1 kg. Suppose that the bob is now replaced with a different bob of mass 2 kg, how will the period of the pendulum change? A.It will double. B.It will halve. C.It will remain the same. D.There is not enough information.

C

An object that completes 10 vibrations in 20 seconds has a frequency of A) 200 hertz. B) 2 hertz. C) 0.5 hertz.

C

If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the: A) light signal. B) radio signal. C) both the same time

C

If you walk towards a mirror at a certain speed, the relative speed between you and your image is: A) your speed. B) half your speed. C) twice your speed. D) none of the above

C

In free space, electromagnetic waves travel at a: A) variety of speeds. B) speed depending on frequency. C) single speed.

C

Interference is a property of: A.sound.B.light. C.Both A and B. D.Neither A nor B.

C

Radio waves travel: A) in common cases at the same speed as sound waves. B) at a speed that depends on frequency. C) always much faster than sound waves. D) slower, on average, than sound waves.

C

The Doppler effect occurs for: A.sound.B.light. C.Both A and B.D.Neither A nor B.

C

The distance between adjacent peaks in the direction of travel for a transverse wave is its: A.frequency.B.period. C.wavelength.D.amplitude.

C

The fact that light travels only at 300,000 km/s in free space is a consequence of: A) electromagnetic wave propagaüon. B) electromagnetic field induction. C) energy conservation. D) Maxwell's laws. E) none of the above

C

The wavelength of a longitudinal wave is the distance between: A.successive compressions .B.successive rarefactions. C.Both A and B. D.None of the above.

C

What is the frequency of an electromagnetic wave that has a wavelength of 300,000 km? A) more than I Hz B) less than 1 Hz C) 1z

C

21) The period of the second hand on a clock is: A) 3600 seconds. B) 1 second. C) 1/60 second. D) 60 seconds. E) 12 hours.

D

25) Human hearing is best in A) infrasonic sound. B) ultrasonic sound. C) both of these D) neither of these

D

27) Your friend says that any radio wave travels appreciably faster than any sound wave: A) disagree with your friend B) find a new friend C) agree with your friend for most common cases D) agree with your friend unconditionally

D

29) When a pulse of white light is incident on a glass prism, the first color to emerge is A) violet. B) orange. C) green. D) red.

D

33) Sound travel fastest in A) steam. B) water, C) water vapor. D) ice. E) all of the above

D

43) Light is reflected when: A) atomic nuclei are made to vibrate. B) electron clouds of atoms are energized. C) electromagnetic waves emanate from matter. D) incident light is returned into the medium from which it came.

D

7) A fishing-boat captain returns to port saying, t'ltrs rough out there with waves that are 4 meters high." He is probably talking of waves of amplitude: A) 3M B) 1M C) 4M D)2 M

D

An object that completes 100 vibrations in 5 seconds has a period of A) 1 second. B) 2 seconds. C) 0.5 second. D) none of the above

D

Electromagnetic waves consist of: A) high-frequency sound waves. B) compression and rarefaction of electromagnetic pulses. C)particles of light energy. D)oscillating electric and magnetic fields.

D

When light passes through common windowpane, its angle of emergence is: A) usually more than its angle of incidence. B) always more than its angle of incidence. C) usually less than its angle of incidence. D) the same as its angle of incidence. E) always less than its angle of incidence.

D

When ultraviolet light is incident upon glass, atoms in the glass: A) are forced into vibration. B) pass the light energy along practically undiminished. C) freely absorb and re-emit most of the ultraviolet light. D) resonate.

D

Both a transverse wave and a longitudinal wave have A) frequency. B) wavelength. C) speed. D) amplitude. E) all of the above

E

Light travels from one place to another along a path of least: A) distance. B) effort. C) expense. D) complication. E) time.

E

Optical fibers are commonly used by : A) surgeons. B) mechanics. C) aviators. D) engineers. E) all of the above

E

Which of these is affected by mass? A) an object sliding down a friction-free plane B) a freely-falling object C) a pendulum D) all of the above E) none of the above

E