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1) A speaker generating a tone at 347 Hz is stationary. A person is moving toward the speaker with a speed of 48 m/s.
Calculate the frequency of the tone perceived by the person.
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A rock takes 2.1 s to hit ground when it is thrown straigh up from a cliff with initial velocity of 7.5 m/s. Calculate height of the cliff in m & length it would take to reach the ground if thrown down with same speed.
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