Question

Ram heard a shrill sound when he rotated the wheel fast because *
1 point
a) The number of vibrations increased per unit time
b) The number of vibrations decreased per unit time
c) The number of vibrations per unit time remained unchanged
d) The amplitude of the vibrations increased​

Answer 1

Answer:

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Explanation:

Answer 2

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Option C - The number of vibrations per unit time remained unchanged