Flashcards
topic 4 physics
Flashcards do conjunto (7)
- 1what is ultrasound?sounds with frequencies higher than 20,000 Hz
- 2What do we use ultrasound for?foetus scanning to make an image
sonar-detecting surroundings
communication between animals-bats and dolphins - 3what equation do you use to work out distance?distance=velocity x time
- 4if the speed of sound in seawater is 1520 m/s and the pulse takes 4.5 seconds, how far away is the submarine from the sea bed?1520 x 4.5= 6840
THEN DIVIDE BY TWO
answer= 3420 m - 5what is infrasound?a sound with frequencies less than 20 Hz
- 6which animals use infrasound to communicate?elephants and also tigers
- 7what two natural occurrences produces infrasoundmeteor strikes and volcanic eruptions
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- GCSE Physics FlashCards sobre topic 4 physics, criado por taylor2em em 23-05-2013.
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- taylor2em
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