Question 7

A sound wave is produced by a source placed a certain distance from a building as shown below. The echo reaches the source after 8 seconds. The speed of sound in air is 340 m·s^-1.

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7.1 Define the term longitudinal wave. (2)

7.2 Calculate the distance between the sound source and the building. (4)

7.3 Name the property of a sound wave that influences its pitch. (1)

7.3 Name the property of a sound wave that influences its pitch. (1)

7.5 Name ONE use of ultrasound in the medical treatment of patients. (1)

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