Sound 0.0 / 5 ? PhysicsSoundGCSEAQA Created by: emewsCreated on: 12-11-17 14:59 What is rarefraction? The sections of the sound waves where the particles are further apart are areas of rarefraction 1 of 9 What is compression? The sections of the sound waves where the particles are pushed together are areas of compression. 2 of 9 What is sonar used for? Sonar is used on ships and submarines to detect fish, other vessels or the sea bed. 3 of 9 What is an oscillioscope? An oscilloscope is a machine that shows the wave shape of an electrical signal. 4 of 9 What is noise? All signals become weaker as they travel long distances. This is called noise. 5 of 9 What signals does noise affect? Noise affects both analogue and digital signals. 6 of 9 How are computers able to create detailed images? Computers are able to create detailed images by combining many ultrasound reflection readings. 7 of 9 What is the speed of sound in air? The speed of sound in air is about 340 m/s. 8 of 9 What type of wave are sound waves? Sound waves are longitudinal waves with means they vibrate in the same direction as the direction of travel. 9 of 9
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