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5 cards from this section. Quick, good the night before a test.
What causes sound?
Think about what happens when you hit a drum.
What is a medium?
Identify the states of matter where sound can travel.
What is the speed of sound in air at 20 ºC?
Consider the distance covered by sound in air at room temperature.
True or False: Sound can travel through a vacuum.
Remember what happens in outer space.
Calculate the frequency of a sound wave that has a speed of 340 m/s and a wavelength of 1.5 m.
Use the formula related to sound wave properties.
If a person hears an echo 2 seconds after shouting, what is the minimum distance to the reflecting surface?
Remember the formula for distance and the significance of echo timing.
7 more questions in this section. Enroll free to practise them all.
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