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

answer and explanation;

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

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joke:

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