Homework 9
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?