Question

the tension in a piano wire is increased by 25% its frequency becomes .......time the original frequency​

Answer 1

Answer:

1.12 times the original frequency

Explanation:

Frequency = velocity/wavelength

but veloctity of a stretched string = square root (Tension/mass density)

therfor when you increase tension by 25%, New tension = square root ( 1.25 old tension)

therefore new frequency = root of 1.25 x F = 1.118x original frequency