Homework 9

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Either (toward you, away from you)

A Doppler effect occurs when a source of sound moves

Sounding board

A bass fiddle is louder than a harp because of its

Refraction

A mirage is a result of atmospheric

Pitch

A sound source of high frequency emits a high

Matches the speed of waves in water

A wave barrier is produced in water when the speed of an object

Both (space and time)

A wave is a vibration in

A mixture of particle sizes

A whitish sky is evidence that the atmosphere contains

Shorter Legs

Because of refraction, a person standing waist deep in a swimming pool appears to have

Water

Both sound and light can travel in

In the same direction in a wave

Compressions and rarefactions normally travel

Frequencies

Different colors of light correspond to different light

50 Hz with a period of 1/50 s.

In Europe an electric razor completes 50 vibrations in 1 s. The frequency of these vibrations is

A vaccum

Light travels faster in

Absorbed by them.

Materials generally become warmer when light is

Survive being scattered in the air

Red sunsets are due to light of lower frequencies that

Speed

Refraction results from differences in lightʹs

Re-echoed sound

Reverberation is a case of

Speeds inside the prism

The colors dispersed by a prism are due to different light

Transmits ultraviolet light

The fact that you can get sunburned while submerged in water is evidence that water

Transmits the wave.

The medium in which a wave travels

Both (Size and shape, elasticity)

The natural frequency of an object depends on its

20 Hz - 20,000 Hz.

The range of human hearing is about

absorption of light re-reflecting inside the wet region.

The reason that a surface appears darker when wet has to do with

Electric charges

The source of electromagnetic waves is vibrating

The air temperature

The speed of a sound wave in air depends on

Red, Blue, Green

The three colors that comprise the image on a TV screen are

Particle sizes

The whiteness of clouds is evidence in the clouds for a variety of

Upward

When sound travels faster at ground level than higher in the air, sound tends to bend

Period

When we consider the time taken for a pendulum to swing to and fro weʹre talking about the pendulumʹs

Sound

Which of the following is a longitudinal wave?


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