John K.

asked • 10/29/22

a sonic depth gauge is placed 4.3 m above the ground.

A sonic depth gauge is placed 4.3 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.024 seconds after it was emitted. The air temperature is −20°C.

(a)

How far (in m) is the surface of the snow from the device? (Round your answer to at least three significant figures.)

 m

(b)

How deep (in m) is the snow?

 m


1 Expert Answer

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Inactive Tutor answered • 02/15/26

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a) Speed of sound @ -20 degree centigrade is 319 m/s.

Distance = (319m/s x.024 s)/ 2 = 3.828 m

b) snow depth = 4.3 m - 3.828m = 0.472 m

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Inactive Tutor

If anyone want more details about sound and relation of velocity of sound with velocity of object then I can talk continuously many hours on this topic because all supersonic and hypersonic aeroplanes are designed based on these theory of speed of sound and speed of aeroplane. The ratio is called Mach number which the ratio between velocity of object divided by velocity of sound.
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02/15/26

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