Physics 101 Exam 2

127 terms by atwietbrock 

Create a new folder

Advertisement Upgrade to remove ads

halves

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

No

Two waves cress are generated at opposite ends of a long rope. Will there be an instant in which the rope's amplitude is zero everywhere?

decrease

As the wavelength of a wave in a uniform medium increases, it its frequency

2 hertz

A floating leaf oscillates up and down two complete cycles each second as a wave passes by. What is the wave's frequency.

3.0 m

The string above 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.

greater speed

Pulling a stretched out slinky tighter will cause a pulse sent down the slinky to have

false

Doubling the frequency of a wave source in a particular medium doubles the speed of the waves.

0.2

A period of 5.0 seconds corresponds to a frequency of _________ Hertz.

sound

not a transverse wave

minimum amplitude

A node is a position of

parallel

In a longitudinal wave, the particles of the medium vibrate or move ________ to the direction the wave is traveling.

None of the above (amplitude, length, frequency)

If waves are going by at the same speed, the wave with the greatest period of oscillation is the wave that has the greatest

2 m/s

As a train of water waves goes by, a piece of cork floating on the water bobs up and down one complete cycle each second. The waves are 2 meters long. What is the speed of the wave?

0.5 hertz

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

1/3 hertz

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.

6 m/s

A wave travels an average distance of 6 meters in one second. What is the wave's velocity?

10 m/s

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

not enough information to say

A wave travels an average distance of 1 meter in 1 second with a frequency of 1 hertz. Its amplitude is

20 m/s

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?

two identical waves moving different directions along the same medium interfere

A standing wave is formed when

remain the same

As a wavelength of a wave in a uniform medium increases, its speed will

1/150 sec

A fly flaps its wings back and forth 150 times each second. The period of a wing flap is

2 cm

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.

2 m

The amplitude of a particular wave is 1 meter. The top-to-bottom distance of the disturbance is

0.5 hertz

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

amplitude, frequency, wavelength, and speed

Like a transverse wave, a longitudinal wave has

2 hertz

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

all of the above (sound, light, and water waves)

Wave interference occurs for

12 cm

A transverse wave is found to have a vertical distance of 8cm from a trough to a crest, a frequency of 12 Hz, and a horizontal distance of 6cm from a crest to the nearest trough. Determine the wavelength of this wave

neither

Mr. Wegley attaches a slinky to the wall and begins introducing pulses with different amplitudes. Which of the two pulses below will reach the wall first?

4 cm

A transverse wave is found to have a vertical distance of 8cm from a trough to a crest, a frequency of 12Hz, and a horizontal distance of 6cm from a crest to the nearest trough. Determine the amplitude of this wave

0.5 hertz

A child on a playground swing makes a complete to-and-fro swing each 2 seconds. The frequency of swing is

wave medium

The speed of a wave is a property of the

antinode

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?

1/2 sec

A pendulum makes 40 vibrations in 20 seconds. Calculate its period

the wavelength is halved and the speed remains constant

Dawn and Aram have stretched a slinky between them and begin experimenting with waves. As the frequency of the waves is doubled,

3 m/s

A skipper on a boat notices wave crests passing the anchor chain every 5 seconds. The skipper estimates the distance between crests is 15m. What is the speed of the water waves?

0.2

A period of 5 seconds corresponds to a frequency of __________ Hz

lower frequency

Lupert and his lady-friend Eunice enjoy another warm day at the swimming pool. Lupert and Eunice start splashing the water. If Eunice makes less force and less frequent splashes than Lupert does, the waves she produces have a...

4

About how many octaves are present between 100 hertz and 1600 hertz?

decreases

As the pitch of a sound in air increases, its wavelength

smaller amplitude

Lupert and his lady-friend Eunice enjoy another warm day at the swimming pool. Lupert and Eunice start splashing the water. If Eunice makes less forceful and less frequent splashes than Lupert does, the waves she produces have a...

longer period

Lupert and his lady-friend Eunice enjoy another warm day at the swimming pool. Lupert and Eunice start splashing the water. If Eunice makes less forceful and less frequent splashes than Lupert does, the waves she produces have a...

none of the above-wavelength, speed, amplitude

Double the frequency of sound wave in air and you also double its

decreases

As we become older, the frequency range of human hearing

both air and water

Interference of sound can occur in

with its base against a table top

Sound will be louder if a struck tuning fork is held

lower frequencies because the wavelength increases

Longer air columns produce

0.2 m

What approximate open tube length will resonate best with a sound wave having a wavelength of 0.40 m?

glass armonica

In the 1700s, Ben Franklin invented a musical instrument that was named the

both air and water

Diffraction of sound can occur in

interference

The phenomenon of beats results from sound

lower frequency notes

All other things being the same, strings that are longer than other identical strings will produce

both air and water

Reflection of sound can occur in

0.15 m

What approximate wavelength of sound resonates best with an open tube that is 0.30 m long?

size, shape, and elasticity

The natural frequency of an object depends on its

2/4

A sound wave resonates best in an open tube when the tube length is approximately ____________ of a wavelength long.

higher frequencies because the speed of the wave in the string increases

When plucked, tighter strings produce

vibrating

The source of every sound is something that is

at its natural frequency

The least energy required to produce forced vibration in an object occurs

lower

With open or closed pipe resonance, the longer the tube, the __________ the pitch.

1 m

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

higher frequency notes

All other things being the same, strings that are stretched more tightly will produce

1059 hertz

Suppose you sound a 1065 Hz 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?

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

true

Sound waves can interfere with another so that no sound results. (true or false)

intensity

The loudness of a sound is most closely related to its

least amount of energy input

Resonance can be looked at as forced vibration with the

solids

Sound generally travels fastest through which materials?

higher the pitch will be

When you blow across bottles partially filled with water, the more water in the bottle, the

amplitude

The loudness of a musical sound is a measure of the sound wave's

2/4

What fraction of a sound wavelength is an open pipe?

lower frequency notes

Strings longer than other identical strings produce

interference

The phenomenon of beats results from sound

7

About how many octaves are between 20 Hz and 2560 Hz?

always in front of the mirror

Real images produced by mirrors

10 degrees

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

are always located behind mirror

Virtual images produced by mirrors

never

Plane mirror images are __________ enlarged

both (plane and curved mirrors)

The law of reflection holds for

never

Plane mirror images are __________ inverted

0.5 m tall

To see his full height when standing 3m from a plane mirror, a boy that is 1m tall needs a mirror that is at least

1/2 height

The shortest plane mirror in which you can see your entire image is

sometimes

Images formed by concave mirrors are __________ upright

sometimes

Images formed by concave mirrors are __________ inverted

sometimes

Images formed by concave mirrors are __________ enlarged

converging; diverging

Concave mirrors are also called __________ mirrors and convex mirrors are also called __________ mirrors

equal distances from the mirror

Object and image for a plane mirror lie

always

Plane mirror images are ____________ virtual.

never

Plane mirror images are ____________ reduced.

never

Plane mirror images are __________ real.

the same amount of yourself

When you look at yourself in a pocket mirror, and then hold the mirror farther away, you see

never

Images formed by convex mirrors are _____________ inverted.

always

Images formed by convex mirrors are ___________ virtual.

never

Images formed by convex mirrors are ____________ real.

lie in the same plane

The incident light ray, the reflected light ray, and the normal between them

twice your speed

If you walk towards a mirror at a certain speed, the relative speed between you and your image is

always

Plane mirror images are ____________ upright.

sometimes

Images formed by concave mirrors are __________ real.

sometimes

Images formed by concave mirrors are _________ reduced.

never

Plane mirrors are __________ reduced.

4 meters

You wish to photograph the image of your little sister, who is standing 2 meters from a plane mirror. Holding the camera beside her head, you should set the distance for

speed in each medium

Refraction results from differences in light's

the change of direction of light as it passes obliquely from one medium into another

Refraction of light is defined as

vacuum

Light travels fastest in

decreases

As light ray enters water from air, its speed

air

A beam of light travels fastest in

all portions of the wave front slow down at the same time

Light does not refract when it passes from air into water and hits head on because

refracts away from the normal

As light ray enters air from water, it

converging lens

A burning glass used to concentrate sunlight in a tiny spot is a

never

Images formed by diverging lenses are _____ the same size as the object

thinner in the middle than in the edges

Diverging lenses are

sometimes

Images formed by converging lenses are _____ reduced

thicker in the middle than in the edges

Converging lenses are

never

Images formed by diverging lenses are _____ inverted

sometimes

Images formed by converging lenses are _____ real

the speed of light in the medium

Optical density refers to

the speed of light in that object

An object's index of refraction allows us to directly calculate

the same as its angle of incidence from the air into the glass

When light passes through an ordinary window pane, its angle of emergence from the glass back into the air is

away from

When light passes from a medium with a high index of refraction value into a medium with a lower index of refraction value, it will bend ___________ the normal.

diverging lenses

Concave lenses are also known as

at the focal point

Objects infinitely far away are focused by a converging lens

converging

Farsightedness is corrected with a _______________ lens.

wavelength

When light is refracted, there is a change in its

the same speed

Different colors of light travel at different speeds in a transparent medium. In a vacuum, different colors of light travel at

slower

The greater a material's index of refraction, the ____________ light travels through that material.

diverging lens

The type of lens that spreads parallel light is a

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set