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PHYSICS

JAMB 2003 - Question 19

Physics 2003 JAMB Past Questions - Question 19: Given that Young's modulus for aluminium is 7.0 x 10¹Nm-² and density is 2.7 x 10³ kgm-³, find the speed of the sound produced if a solid bar is struck at one end with a hammer

Choose the correct answers from the options given.

Given that Young's modulus for aluminium is 7.0 x 10¹Nm-² and density is 2.7 x 10³ kgm-³, find the speed of the sound produced if a solid bar is struck at one end with a hammer

A: 5.1 x 10³ms¹

B: 4.2x10³ms-¹

C: 3.6 x 10³ms¹

D: 2.8x 10³ms¹

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Correct Answer

Explanation

The speed of sound in a material is given as:

V= √ E/P ,WhereE=Young's modulusP=Density Therefore V= √ 7.0×10^10/2.7×10^3 = 5091.75=5.1×103MS−1