The doppler effect is used at baseball games to measure a) moving clouds b) weather c) speed d) temperature

The correct answer is option C

Doppler effect can be defined as the change in wavelength or frequency of a wave with rest to the observer who is moving relative to the source of the  sound wave.

This technique is used in baseball to measure the change in frequency of the sound waves.

The coach uses a radar to measure the speed of an approaching pitched baseball.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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