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WorksheetsUnit Test on Waves
Total questions: 22
Worksheet time: 59mins
A girl stands 160 m away from a high wall and claps her hands at a steady rate so that each clap coincides with the echo of the one before. If her clapping rate is 60 per minute, state the value this gives for the speed of sound.
If she moves 40 m closer to the wall she finds the clapping rate has to be 80 per minute. Calculate the value these measurements give for the speed of sound.
She moves again and finds the clapping rate becomes 30 per minute. Calculate how far she is from the wall if the wave speed of sound is the value you found in question 1
Draw the waveform of
1. a loud, low-pitched note
2. a soft, high-pitched note.
If the speed of sound is 340 m/s what is the wavelength of a note of frequency
1. 340 Hz
2. 170 Hz?
Explain with reference to a sound wave what is meant by the terms
1. compression
2. rarefaction.
State how far a compression and the nearest rarefaction are apart in terms of the wavelength of a sound wave.
A sound wave has a frequency of 220 Hz and travels in air with a speed of 330 m/s. Calculate the distance between consecutive rarefactions.
Name the state of matter in which
sound waves travel faster
solid
liquid
gass
Name the state of matter in which
sound waves travel the slowest
gass
liquid
solid
Describe how sound waves are used in sonar.
Name two uses of ultrasound other than sonar.
Tuning forks of frequencies 128 Hz and 256 Hz are sounded. Which tuning fork has the highest pitch?
128 Hz
256 Hz
Sound waves of wavelengths 0.8 m and 1.2 m are produced in air. Which of the waves has the highest pitch?
0.8 m
1.2 m
State the approximate range of frequencies of the human ear.
State an approximate value for the speed of sound in air.
If 5 seconds elapse between a lightning flash and the clap of thunder, how far away is the storm? [Speed of sound = 330 m/sl
What properties of sound suggest it is a wave motion?
How does a progressive transverse wave differ from a longitudinal one? Which type of wave is a sound wave?
Describe how a sound wave can be produced
Describe how the air molecules vibrate when a
sound wave is transmitted in air.
How far apart are the compressions in a sound wave?
