1.

The diameter of a rotating fly wheel is R. Its coefficient of linear expansion is alpha. If the temperature is increased by DeltaT, the percentage change in its rotational KE would be

Answer»

`alpha.Delta.100`
`2.alpha.Deltatxx100`
`(alphaDeltat)/(2)XX100`
`(2alphaDeltat)/(5)xx100`

ANSWER :B


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