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A sonic depth gauge is placed 5.8 m above the ground

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Question

A sonic depth gauge is placed 5.8 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.030 seconds after it was emitted. The air temperature is −20°C.

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

 m

How deep (in m) is the snow?

 
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