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5 cards from this section. Quick, good the night before a test.
What is sound?
It's related to vibrations.
Can sound travel through a vacuum?
Think about how far sound can travel.
What produces sound?
Think about what you do to generate sound.
True or False: Sound can travel through a vacuum.
Consider where you might hear sound.
If a sound wave travels from a speaker to a wall 15 meters away, then reflects back, how long does it take for the sound to travel to the wall and back if the speed of sound in air is 343 m/s?
Remember to calculate the total distance for the round trip.
A dolphin uses ultrasonic sounds for communication which travel at approximately 1500 m/s. If it sends a sound to a fish that is 800 meters away, how long does it take for the sound to reach the fish?
Use the speed formula to find how long it takes.
6 more questions in this section. Enroll free to practise them all.
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