topic 4 physics

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GCSE Physics Flashcards on topic 4 physics, created by taylor2em on 23/05/2013.
taylor2em
Flashcards by taylor2em, updated more than 1 year ago
taylor2em
Created by taylor2em over 11 years ago
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Question Answer
what is ultrasound? sounds with frequencies higher than 20,000 Hz
What do we use ultrasound for? foetus scanning to make an image sonar-detecting surroundings communication between animals-bats and dolphins
what equation do you use to work out distance? distance=velocity x time
if 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
what is infrasound? a sound with frequencies less than 20 Hz
which animals use infrasound to communicate? elephants and also tigers
what two natural occurrences produces infrasound meteor strikes and volcanic eruptions
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