Sound

The period of an ocean wave is 10 seconds. What is the waves frequency?

.1 Hz

A weight on the end of a spring bobs up and down one complete cycle every 2 seconds. Its FREQUENCY is __.

.5 hz

A weight suspended from a spring bobs up and down over a distance of 1 meter in 2 seconds. It FREQUENCY is___.

.5 hz

A certain ocean wave has a frequency of 0.05 Hz and a wavelength of 10 m. What is the waves speed?

.5 m/s

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

1 meter

The frequency of the second hand on a clock is____.

1/60 Hz

A tuning fork of a frequency 200 hz will resonate if a sound wave incident on it has a frequency of ___.

100 hz

Compared to a sound of 40 decibels, a sound of 60 decibels is ___.

100 times the intensity

Compared to the threshold of hearing, a sound level of the 30 decibels is __.

1000 times more

A 1056- Hz tuning fork is sounded at the same time a piano note in struck. You hear three beats per second. What is the frequency of the piano string?

1053 Hz

Suppose you sound a tuning fork at the same time you hit a 1056 Hz note on the piano and hear 2 beats per second. You tighten the piano string very slightly and now hear 3 beats per sec. What is the frequency of the tuning fork?

1054 Hz

A leaf on a pond oscillates up and down two complete cycles each second as a water wave passes. What is the waves Frequency?

2 Hz

A weight on the end of a spring bobs up and down one completely cycle every 2 seconds. Its PERIOD is ___.

2 seconds

A cork floating in the ocean oscillates up and down two complete cycles in 1 second as an ocean wave passes by. The wave's wavelength is 10 meters. What is the WAVES SPEED?

20 m/s

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

2m

Two waves arrive at the same place at the same time exactly in step with each other. Each wave has an amplitude of 1 m. The resulting wave has an amplitude of ___.

2m

A general rule for estimating the distance in kilometers between and observer and a lightening bolt is to count the number of second between seeing and hearing the bolt, and divide by ___.

3

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

3 m/s

A wave has two up and down cycles each second. If the wave travels an average distance of 6 meters in 1 second, its wavelength is ___.

3 meters

Two whistles produce sounds of wavelengths 3.4 m and 3.3 m. What is the beat frequency produced?

3.0 Hz

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

3.0 m

A sound wave that has a wavelength of 1 meter in room temperature air has a frequency of about -__.

340 Hz

How many times a minute will you be in step with a friend when you walk at 80 steps per minute and your friend walks at 75 per minute?

5 minutes

Beats are produced when two tuning forks, one of frequency 240 Hz and the other frequency 246 Hz are sounded together. The frequency of the beats is ___.

6 Hz

A wave travels an average distance of 6 meters in 1 second. What is the wave's velocity(Speed)?

6 m/s

The speed of sound in dry air at 20 degrees celcius is 340 m/s. How far away is a jet plane when you notice a 2-second delay between seeing the plane and hearing it?

680 m

Unlike a transverse wave, a longitudinal wave has no ___.

A longitudinal wave has all of the above

What happens when an airplane is flying faster than the speed of sound?

A shock wave is produced

A horse would be able to run faster if most of the mass in its legs were concentrated ___.

In the upper part, near the horses body

When a sound source moves towards you., what happens to the wave speed?

It stays the same.

Which of the following would be most likely to transmit sound the best?

Steel in a bridge

The Doppler effect is the change in observed frequency due to ___.

The motion of the source of the observer

Sound waves cannot travel in ___.

a vaccum

Sound waves in air are a series of ___.

all of the above

Standing waves can be set up ___.

all of the above

The sonic boom produces by an aircraft flying near the ground will be reduced if the aircraft ____.

all of the above

Some of a wave's energy is always being dissipated as heat. In time, this will reduce the wave's ___.

amplitude

Resonance occurs when __.

an object is forced to vibrate at its natural frequency.

When can you touch a standing wave on a rope without disturbing the wave?

at a node

A Doppler effect occurs when a source of sound move ___.

away from you and towards you

When the handle of a tuning fork is held solidly against a table, the sound becomes louder and the length of the fork vibrates __.

becomes shorter

As sounds of a car's horn passes and recedes from you, the pitch of the horn seems to ___.

decrease

Suppose a simple pendulum is suspended in an elevator. When the elevator is accelerating upward, the period of the pendulum ___.

decreases

An observer on the ground hears a sonic boom which is created by an airplane flying at a speed ___.

greater than the speed of sound

If you double the frequency of a vibrating object, its period___.

halves

Beats can be heard when two tuning forks ___.

have almost the same frequency and are sounded together

Suppose a bug is jiggling up and down and swimming towards you at the same time. Compared to the frequency at which the bug is emitting waves, the frequency of the waves reaching you is ____.

higher

In which one of the following does sound travel fastest?

ice

The phenomenon of beats results from sound ___.

interference

When two or more waves are at the same place at the same time, the resulting effect is called ___.

interference

A sonic boom ___.

is swept continuously behind a plane flying faster than the speed of sound

Xenon has atomis number 54, an krypton has atomic number 36. Given that both gases are at the same temperature, in which medium does sound travel fastest?

krypton gas

A sound wave is a ___.

longitudinal wave

Sound is an example of a ___.

longitudinal wave

When a pendulum clock is taken from sea level to the top of a high mountain, it will ___.

lose time

If the sounding board were left out of a music box, it would__.

make little "plinks" that you could hardly hear.

An explosion occurs 34 km away. Given that sound travels at 340 m/s, the time it takes fr the sound to reach you is ___.

more than 20 seconds

During a single period, the distance traveled by a wave is ___.

one wavelength

The time needed for a wave to make one complete cycle is its __.

period

The singer caruso is said to have made a crystal chandelier shatter with his voice. This is a demonstration of ___.

resonance

A child swings back and forth on a playground swing. If the child stands rather than sits, the time for a to-and from swing is ____.

shortened

You dip your finger repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves ___.

shortens

Compared to the speed of light, sound travels ___.

slower

Which of the following is NOT a transverse wave?

sound

An aircraft that flies faster than the speed of sound is said to be ___.

supersonic

The speed of a sound wave depends on ___.

the air temperature

A wave created by shaking a rope up and down is called a ___.

transverse wave

T or F: Sound waves can interfere with one another so that no sound results.

true

Hertz is a _.

unit of frequency

Sound waves are produced by___.

vibrating objects

The source of all wave motion is ___.

vibration

Sound travels faster in air if the air is ___.

warm

The distance between successive identical parts of a wave is called its ___.

wavelength