How long would it take for a sound impulse to travel through an aluminum rod 25 kilometers long? a. 0.0049 sec b. 0.071 sec c. 4.9 sec d. 0.14 sec

c) 4.9 s

Explanation:

Young's modulus of aluminium is given as

density of aluminium is given as

now the speed of sound in aluminium is given as

now the time taken by the sound to travel a distance of d = 25 km

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