Ultrasound 0.0 / 5 ? PhysicsWaves and SoundGCSEAQA Created by: CharCreated on: 20-05-13 16:55 What frequencies can the human ear detect sound waves of? 20Hz - 20,000Hz 1 of 17 What are sound waves of a higher frequency called? Ultrasound waves 2 of 17 What can be used to produce ultrasound waves? Electronic systems 3 of 17 Where is the boundary that the wave meets? Between two different materials 4 of 17 What happens to part of the wave? It is reflected 5 of 17 The wave then travels back through the.... Material 6 of 17 To a what? Detector 7 of 17 How do you calculate how far away a boundary is? The time it takes to reach the detector 8 of 17 What are the results normally processed by, to give an image? A computer 9 of 17 What is the equation to work out the distance travelled by an ultrasound pulse? s=v*t 10 of 17 What is 's'? The distance travelled - m 11 of 17 What is 'v'? Speed of the ultrasound wave - m/s 12 of 17 What is 't'? Time taken - s 13 of 17 Why can ultrasound be used in medicine for scanning? It is non-ionising 14 of 17 So it is safer than? X-rays 15 of 17 What's an example of what it can be used for? Scanning soft tissue such as the eye 16 of 17 How is ultrasound used in theropy? To shatter kidney stones in small pieces 17 of 17
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