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Speed of a longitudinal wave in a solid rod from Young's modulus and density

This type of question, asked 2 times: 31 Jan 2023, 28 Jan 2026 S2. All 2 questions below, oldest first.

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  1. Question 1

    31 Jan 2023

    104
    For a solid rod, the Young's modulus of elasticity is 3.2×1011Nm−23.2 \times10^{11}Nm^{- 2} and density is 8×103 kg m−38 \times10^{3}\text{ }kg{\text{ }m}^{- 3}. The velocity of longitudinal wave in the rod will be.

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  2. Question 2

    28 Jan 2026 S2

    9
    The speed of a longitudinal wave in a metallic bar is 400 m/s400\text{ }m/s. If the density and Young's modulus of the bar material are increased by 0.5%0.5\% and 1%1\% respectively then the speed of the wave is changed approximately to ____\_\_\_\_ m/sm/s.

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