Physics Exam 2
The amplitude of a particular wave is 1 meter. The top-to-bottom distance of the disturbance is Answers: 0.5 m. 1 m. 2 m. none of these
2m
A standing wave is formed in the string in the picture shown above by rapidly moving the string back and forth. If the string is 12 feet long and 20 complete back and forth vibrations are made every 4.0 s, what is the wavelength of the standing wave? Answers: 3 ft 6 ft 9 ft 12 ft 24 ft
6ft
What color is a normally magenta object when illuminated with blue light? Answers: red blue green cyan yellow magenta white black
BLUE
What approximate open tube length will resonate best with a sound wave having a wavelength of 0.30 m? Answers: 0.075 m 0.15 m 0.30 m 0.60 m 1.20 m
Selected Answer: 0.15 m
About how many octaves are present between 20 hertz and 2560 hertz? Answers: 5 6 7 8 9
Selected Answer: 7
What approximate open tube length will resonate best with a sound wave having a wavelength of 0.40 m? Answers: 0.10 m 0.20 m 0.40 m 0.80 m 1.60 m
Selected Answer: 0.20 m
A piano tuner knows that a key on the piano is tuned to the frequency of his tuning fork when he strikes them at the same time and the number of beats he hears each second is Answers: 0. 1. 2. 3. 4.
Selected Answer: 0.
A weight suspended from a spring bobs up and down over a distance of one meter in two seconds. Its frequency is Answers: 0.5 hertz. 1 hertz. 2 hertz. None of the above choices are correct.
Selected Answer: 0.5 hertz.
An object that completes 10 vibrations in 20 seconds has a frequency of Answers: 0.5 hertz. 2 hertz. 10 hertz. 20 hertz. 200 hertz.
Selected Answer: 0.5 hertz.
A 340-hertz sound wave travels at 340 m/s in air with a wavelength of Answers: 1 m. 10 m. 100 m. 1000 m. None of the above choices are correct.
Selected Answer: 1 m.
A wave has an amplitude of 2 cm and a frequency of 12 Hz, and the distance from a crest to the nearest trough is measured to be 5 cm. Determine the period of such a wave. Answers: 1/12 sec 1/6 sec 2 sec 6 sec 12 sec
Selected Answer: 1/12 sec
A fly flaps its wings back and forth 150 times each second. The period of a wing flap is Answers: 150 sec. 1.5 sec. 1/75 sec. 1/150 sec.
Selected Answer: 1/150 sec.
Two boats are anchored four meters apart. They bob up and down once every three seconds, but when one is up the other is down. There are never any wave crests between the boats. Calculate the frequency of the waves. Answers: 1/3 hertz 1/4 hertz 3 hertz 4 hertz 3/4 hertz
Selected Answer: 1/3 hertz
A sound wave resonates best in a closed tube when the tube length is approximately __________ of a wavelength long. Answers: 1/4 2/4 3/4 4/4
Selected Answer: 1/4
A diver shines light up to the surface of a smooth pond at a 10 degree angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of Answers: less than 10 degrees. 10 degrees. more than 10 degrees.
Selected Answer: 10 degrees.
A floating object oscillates up and down 2 complete cycles in 1 second as a water wave of wavelength 5 meters passes by. The speed of the wave is . Answers: 2 m/s. 5 m/s. 10 m/s. 15 m/s. none of these
Selected Answer: 10 m/s
Suppose you sound a 1056-hertz tuning fork at the same time you strike a note on the piano and hear 2 beats/second. You tighten the piano string very slightly and now hear 3 beats/second. What is the frequency of the piano string? Answers: 1053 hertz 1054 hertz 1056 hertz 1058 hertz 1059 hertz
Selected Answer: 1059 hertz
A transverse wave is found to have a vertical distance of 4 cm from a trough to a crest, a frequency of 12 Hz, and a horizontal distance of 5 cm from a crest to the nearest trough. Determine the amplitude of this wave. Answers: 2 cm 2.5 cm 4 cm 5 cm 8 cm 10 cm
Selected Answer: 2 cm
A floating leaf oscillates up and down two complete cycles each second as a water wave passes by. What is the wave's frequency? Answers: 0.5 hertz 1 hertz 2 hertz 3 hertz 6 hertz
Selected Answer: 2 hertz
The wave diagram above depicts 12 seconds of a wave's motion. Determine the period of the wave. Answers: 1/12 s 1/2 s 2 s 3 s 6 s
Selected Answer: 2 s
A kid on a playground swing makes a complete to-and-fro swing each 2 seconds. The period of swing is Answers: 0.5 second. 1 second. 2 second.
Selected Answer: 2 second.
Correct A sound wave resonates best in an open tube when the tube length is approximately __________ of a wavelength long. Answers: 1/4 2/4 3/4 4/4
Selected Answer: 2/4
The approximate range of human hearing is Answers: 10 hertz to 10,000 hertz. 20 hertz to 20,000 hertz. 40 hertz to 40,000 hertz. Actually all of these depends on the hearing
Selected Answer: 20 hertz to 20,000 hertz.
A floating leaf oscillates up and down two complete cycles in one second as a water wave passes by. The wave's wavelength is 10 meters. What is the wave's speed? Answers: 2 m/s 10 m/s 20 m/s 40 m/s more than 40 m/s
Selected Answer: 20 m/s
The string above is 1.5 meters long and is vibrating as the first harmonic (one loop). The string vibrates up and down with 33 complete vibrational cycles in 10 seconds. Determine the wavelength for this wave. Answers: 0.15 m 0.75 1.5 m 3 m 6 m
Selected Answer: 3 m
A wave oscillates up and down two complete cycles each second. If the wave travels an average distance of 6 meters in one second, its wavelength is Answers: 0.5 m. 1 m. 2 m. 3 m. 6 m.
Selected Answer: 3 m.
About how many octaves are present between 100 hertz and 1600 hertz? Answers: 4 5 6 7 8
Selected Answer: 4
A transverse wave is found to have a vertical distance of 8 cm from a trough to a crest, a frequency of 12 Hz, and a horizontal distance of 6 cm from a crest to the nearest trough. Determine the amplitude of this wave. Answers: 2 cm 4 cm 6 cm 8 cm 10 cm 12 cm
Selected Answer: 4 cm
The string above is 6.0 meters long and is vibrating as the third harmonic (three loops). The string vibrates up and down with 45 complete vibrational cycles in 10 seconds. Determine the frequency for this wave. Answers: 10/45 hertz 45/10 hertz 2 hertz 3 hertz 6 hertz
Selected Answer: 45/10 hertz
A standing wave is formed in the string in the picture shown above by rapidly moving the string back and forth. If the string is 12 feet long and 20 complete back and forth vibrations are made every 4.0 s, what is the wavelength of the standing wave? Answers: 3 ft 6 ft 9 ft 12 ft 24 ft
Selected Answer: 6 ft
The beat frequency produced when a 240 hertz tuning fork and a 246 hertz tuning fork are sounded together is Answers: 6 hertz. 12 hertz. 243 hertz. 486 hertz. None of the above choices are correct.
Selected Answer: 6 hertz.
A wave travels an average distance of 6 meters in one second. What is the wave's velocity? Answers: less than 0.2 m/s 1 m/s 3 m/s 6 m/s more than 6 m/s
Selected Answer: 6 m/s
A 60-vibration-per-second wave travels 30 meters in 1 second. Its frequency is Answers: 30 hertz and it travels at 60 m/s. 60 hertz and it travels at 30 m/s. 1800 hertz and it travels at 2 m/s. 30 hertz and it travels at 30 m/s. 60 hertz and it travels at 60 m/s. 1800 hertz and it travels at 1 m/s.
Selected Answer: 60 hertz and it travels at 30 m/s.
The frequency of a note one octave higher in pitch than a 440-Hz note is Answers: 1760 Hz. 880 Hz. 440 Hz. 220 Hz. 110 Hz.
Selected Answer: 880 Hz.
Wave interference occurs for Answers: sound waves. light waves. water waves. All of the above choices are correct. None of the above choices are correct.
Selected Answer: All of the above choices are correct.
We are best at hearing Answers: infrasonic sound. ultrasonic sound. both infrasonic and ultrasonic None of the above choices are true.
Selected Answer: None of the above choices are true.
Sound waves can interfere with one another so that no sound results. Answers: True False Either true or false, depending on the air temperature.
Selected Answer: True
A sound wave is a mechanical wave; not an electromagnetic wave. This means that Answers: particles of the medium move perpendicular to the direction of energy transport. a sound wave transports its energy through a vacuum. particles of the medium regularly and repeatedly oscillate about their rest position. a medium is required in order for sound waves to transport energy.
Selected Answer: a medium is required in order for sound waves to transport energy.
A standing wave occurs when Answers: two waves overlap. a wave reflects upon itself. the speed of the wave is zero or near zero. the amplitude of a wave exceeds its wavelength.
Selected Answer: a wave reflects upon itself.
A beam of light travels fastest in Answers: glass. water. plastic. air. is the same in each of these
Selected Answer: air.
Which color of light has the greatest speed in a vacuum? Answers: red orange yellow green blue violet all have the same speed in a vacuum
Selected Answer: all have the same speed in a vacuum
Light does not refract when it passes from air into water and hits the water "head on" because Answers: light does not change speed when it enters the water "head on." all portions of the wave front slow down at the same time. all portions of the wave front speed up at the same time. light maintains the same frequency in the water. the wavelength of the light increases while its frequency decreases.
Selected Answer: all portions of the wave front slow down at the same time.
Refraction of light can only occur if Answers: the speed of light changes. light enters a new medium at an oblique angle. light enters a new medium having a different optical density. all the above
Selected Answer: all the above
Images formed by diverging lenses are _____________ virtual. Answers: always sometimes never
Selected Answer: always
Like a transverse wave, a longitudinal wave has Answers: amplitude, frequency, wavelength, and speed. amplitude, frequency, and wavelength. amplitude, wavelength, and speed. wavelength, speed, and frequency. amplitude, frequency, and speed.
Selected Answer: amplitude, frequency, wavelength, and speed.
The loudness of a musical sound is a measure of the sound wave's Answers: wavelength. frequency. speed. amplitude. all of these
Selected Answer: amplitude.
Suppose that there was a ride at an amusement park which was titled "The Standing Wave." Which location - node or antinode - on the ride would give the greatest thrill? Answers: node antinode
Selected Answer: antinode
Virtual images produced by mirrors Answers: are always located in front of the mirror. are always located behind the mirror. may be located in front or behind the mirror.
Selected Answer: are always located behind the mirror.
An opaque object is blue when illuminated with white light. What color is it when viewed through a red transparency? Answers: red green blue cyan magenta yellow black
Selected Answer: black
An opaque object is green when illuminated with white light. What color is it when viewed through a magenta transparency? Answers: red green blue cyan magenta yellow black
Selected Answer: black
What color is a normally blue object when illuminated with green light? Answers: red blue green cyan yellow magenta white black
Selected Answer: black
What color is a normally green object when illuminated with magenta light? Answers: red blue green cyan yellow magenta white black
Selected Answer: black
What color is a normally blue object when illuminated with magenta light? Answers: red blue green cyan yellow magenta white black
Selected Answer: blue
What color is a normally cyan object when illuminated with magenta light? Answers: red blue green cyan yellow magenta white black
Selected Answer: blue
What color is a normally magenta object when illuminated with cyan light? Answers: red blue green cyan yellow magenta white black
Selected Answer: blue
Cyan light is really a mixture of Answers: red and blue light. blue and green light. red and yellow light. yellow and green light. none of these
Selected Answer: blue and green light.
The yellow clothes of a stage performer can be made to look black if illuminated only by light that is Answers: blue. green red yellow
Selected Answer: blue.
Interference of sound can occur in Answers: air. water. both air and water. neither air nor water.
Selected Answer: both air and water.
Refraction of sound can occur in Answers: air. water. both air and water. neither air nor water.
Selected Answer: both air and water.
Indicate the interval which represents one full wavelength. Answers: a to c a to g b to d c to g
Selected Answer: c to g
A "burning glass" used to concentrate sunlight in a tiny spot is a Answers: converging lens. diverging lens. either neither
Selected Answer: converging lens.
Convex lenses are also known as Answers: converging lenses. diverging lenses. contact lenses. gravity lenses
Selected Answer: converging lenses.
What color is a normally cyan object when illuminated with cyan light? Answers: red blue green cyan yellow magenta white black
Selected Answer: cyan
As the frequency of a wave increases, the period of the wave Answers: decreases. increases. remains the same.
Selected Answer: decreases.
As the pitch of a sound increases, its wavelength Answers: increases. decreases. stays the same.
Selected Answer: decreases.
Repeatedly tap the side of a drinking glass with a spoon while filling it with water and you will notice that the pitch of the sound Answers: increases. decreases. remains relatively constant.
Selected Answer: decreases.
The spreading of a wave around a barrier or through an opening is known as Answers: refraction. diffraction. interference. reflection
Selected Answer: diffraction.
The type of lens that spreads parallel light is a Answers: converging lens. diverging lens. combination converging-diverging lens.
Selected Answer: diverging lens.
The smaller a material's index of refraction, the _____________ light travels through that material. Answers: faster slower more less
Selected Answer: faster
Different colors of light correspond to different light Answers: velocities. intensities. polarities. frequencies. none of these
Selected Answer: frequencies.
The pitch of a musical sound depends on the sound wave's Answers: wavelength. frequency. speed. amplitude. all of these
Selected Answer: frequency.
An opaque object is cyan when illuminated with white light. What color is it when viewed through a green transparency? Answers: red green blue cyan magenta yellow black
Selected Answer: green
What color light is absorbed by a piece of magenta glass? Answers: red blue green yellow cyan magenta
Selected Answer: green
In which one of these media does sound travel the fastest? Answers: water vapor water ice steam Sound travels the same speed in each of the above media.
Selected Answer: ice
As a light ray enters air from water, its speed Answers: increases. decreases. may increase or decrease, depending on its incident angle. does not change.
Selected Answer: increases.
When light shines through a double slit, the interference pattern produced "spreads out" (the color bands get wider and more spaced out) as the distance from the slits to the screen... Answers: increases. decreases. neither - the pattern is unaffected by changes in the distance to the screen
Selected Answer: increases.
Resonance can be looked at as forced vibration with the Answers: least amount of energy input. maximum amount of energy input. matching of wave amplitudes. matching of constructive and destructive interference. minimum beat frequency.
Selected Answer: least amount of energy input.
If two waves are going by at the same frequency, the wave that has the greatest speed will have the greatest Answers: amplitude. length. frequency. None of the above choices are true.
Selected Answer: length.
The incident light ray, the reflected light ray, and the normal between them Answers: lie in the same plane. may or may not lie in the same plane. lie in planes that are perpendicular to one another.
Selected Answer: lie in the same plane.
A sound wave is a Answers: longitudinal wave. transverse wave. standing wave. shock wave. None of the above choices are
Selected Answer: longitudinal wave.
With open or closed pipe resonance, the longer the tube, the ______________ the pitch. Answers: higher lower faster slower
Selected Answer: lower
All other things being the same, strings that are longer than other identical strings will produce Answers: higher frequency notes. lower frequency notes. the same frequency notes.
Selected Answer: lower frequency notes.
What color light is transmitted by a piece of magenta glass? Answers: red blue green yellow cyan magenta
Selected Answer: magenta
If sunlight were green instead of white, the most comfortable color to wear on a cold day would be Answers: magenta. yellow. green. blue. violet.
Selected Answer: magenta.
Mr. Wegley attaches a slinky to the wall and begins introducing pulses with different wavelengths. Which of the two pulses (C or D) will reach the wall first? Answers: C D neither
Selected Answer: neither
Images formed by convex mirrors are _____________ enlarged. Answers: always sometimes never
Selected Answer: never
Images formed by convex mirrors are _____________ inverted. Answers: always sometimes never
Selected Answer: never
Images formed by convex mirrors are _____________ real. Answers: always sometimes never
Selected Answer: never
Images formed by diverging lenses are _____________ the same size as the object. Answers: always sometimes never
Selected Answer: never
Plane mirror images are _____________ enlarged. Answers: always sometimes never
Selected Answer: never
Double the frequency of sound wave in air and you also double its Answers: wavelength. speed. amplitude. all of these none of these
Selected Answer: none of these
A transverse wave is transporting energy from east to west. The particles of the medium will move Answers: east to west north to south all directions
Selected Answer: north to south
A sound wave is different than a light wave in that a sound wave is Answers: produced by an oscillating object and a light wave is not. not capable of traveling through a vacuum. not capable of diffracting and a light wave is. capable of existing with a variety of frequencies and a light wave has a single frequency.
Selected Answer: not capable of traveling through a vacuum.
To say that one wave is out of phase with another is to say that the waves are Answers: of different amplitudes. of different frequencies. of different wavelengths. out of step. all of these
Selected Answer: out of step.
Complementary colors are two colors that Answers: look good together. are additive primary colors. are subtractive primary colors. produce white light when added together. are right for each other.
Selected Answer: produce white light when added together.
An opaque object is yellow when illuminated with white light. What color is it when viewed through a red transparency? Answers: red green blue cyan magenta yellow black
Selected Answer: red
What color is a normally yellow object when illuminated with magenta light? Answers: red blue green cyan yellow magenta white black
Selected Answer: red
When white light is viewed through a spectroscope, the outermost color seen is... Answers: red, because it has the longest wavelength. red, because it has the shortest wavelength. violet, because it has the longest wavelength. violet, because it has the shortest wavelength.
Selected Answer: red, because it has the longest wavelength.
When white light is viewed through a spectroscope, the outermost color seen is... Selected Answer: red, because it has the longest wavelength. Answers: red, because it has the longest wavelength. red, because it has the shortest wavelength. violet, because it has the longest wavelength. violet, because it has the shortest wavelength.
Selected Answer: red, because it has the longest wavelength.
The change of direction of a wave as it obliquely enters a new medium and changes speed is known as Answers: refraction. diffraction. interference. reflection.
Selected Answer: refraction.
As a light ray enters water from air, it Answers: refracts toward the normal. refracts away from the normal. refracts toward or away from the normal, depending on its frequency. does not refract.
Selected Answer: refracts toward the normal.
As the wavelength of a wave in a uniform medium increases, its speed will Answers: decrease. increase. remain the same.
Selected Answer: remain the same.
The natural frequency of an object depends on its Answers: size, shape and elasticity. size and shape. size and elasticity. shape and elasticity.
Selected Answer: size, shape and elasticity.
The greater a material's index of refraction, the ___________ light travels through that material. Answers: faster slower heavier lighter
Selected Answer: slower
Images formed by concave mirrors are _____________ enlarged. Answers: always sometimes never
Selected Answer: sometimes
Images formed by concave mirrors are _____________ inverted. Answers: always sometimes never
Selected Answer: sometimes
As the pitch of a sound increases, its amplitude Answers: increases. decreases. stays the same.
Selected Answer: stays the same.
When light passes through an ordinary window pane, its angle of emergence from the glass back into the air is Answers: usually less than its angle of incidence from the air into the glass. always less than its angle of incidence from the air into the glass. the same as its angle of incidence from the air into the glass. usually more than its angle of incidence from the air into the glass. always more than its angle of incidence from the air into the glass.
Selected Answer: the same as its angle of incidence from the air into the glass.
An object's index of refraction allows us to directly calculate Answers: the frequency of light in that object. the color of light in that object. the wavelength of light in that object. the speed of light in that object.
Selected Answer: the speed of light in that object.
Optical density refers to Answers: how thick the medium is. how heavy the medium is. the speed of light in the medium. whether or not light can travel through the medium. all the above
Selected Answer: the speed of light in the medium.
Dawn and Aram have stretched a slinky between them and begin experimenting with waves. As the frequency of the waves is doubled, Answers: the wavelength is halved and the speed remains constant the wavelength remains constant and the speed is doubled both the wavelength and the speed are halved. both the wavelength and the speed remain constant.
Selected Answer: the wavelength is halved and the speed remains constant
Converging lenses are Answers: thicker in the middle than in the edges. thinner in the middle than in the edges. lenses that have one flat side.
Selected Answer: thicker in the middle than in the edges.
Diverging lenses are Answers: thicker in the middle than in the edges. thinner in the middle than in the edges.
Selected Answer: thinner in the middle than in the edges.
A common source of wave motion is a Answers: wave pattern. harmonic object. vibrating object. region of variable high and low pressure. none of these
Selected Answer: vibrating object.
The source of every sound is something that is Answers: vibrating. moving. accelerating. undergoing simple harmonic motion. a net emitter of energy.
Selected Answer: vibrating.
Which color of light has the greatest frequency in a vacuum? Answers: red orange yellow green blue violet all have the same frequency in a vacuum
Selected Answer: violet
Sound will be louder if a struck tuning fork is held Answers: in the air. with its base against a table top. with its prongs in shallow water. in your closed fist.
Selected Answer: with its base against a table top.
What color light is transmitted by a piece of yellow glass? Answers: red blue green yellow cyan magenta
Selected Answer: yellow
A blue object will appear black when illuminated with Answers: blue light. cyan light. yellow light. magenta light. none of these
Selected Answer: yellow light.
The complementary color of blue is Answers: red. green. yellow. cyan. magenta.
Selected Answer: yellow.
As a light ray enters water from air, it Answers: refracts toward the normal. refracts away from the normal. refracts toward or away from the normal, depending on its frequency. does not refract.
refracts toward the normal.