3 years ago

The sound strikes the cantina walls and bounces off at the same angle as it struck in a process known as _____.

2 answers:

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<span>Reflection

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.</span>

Korvikt [17]3 years ago

4 0

Answer:

Reflection

Explanation:

If the sound wave strikes on a smooth surface at any angle, it bounces back into the same medium with the same angle. It is the called reflection of sound.

Sound waves obey the laws of reflection.

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A student weighing 700 N climbs at constant speed to the top of an 8 m vertical rope in 10 s. The average power expended by the

stich3 [128]

Answer:

3. 560W

Explanation:

First we calculate the work required for the 700N weigh student to climb up by 8 meters. Work is force times distance

W = Fs = 700 * 8 = 5600J

The average power is defined as the rate of energy expended over a unit of time. In order words, work divided by time duration

P = W/t = 5600 / 10 = 560 W

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