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Percentage erros in the measurement of m...

Percentage erros in the measurement of mass and speed are 2% and 3% respectively. The error in the estimation of kinetic energy obtained by measuring mass and speed will be:

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The correct Answer is:
`1.8xx10^(5) sec`

`U_(initial")=(KQ^(2))/axx2=(2KQ^(2))/a`
`U_("final")=(KQ^(2))/((a/2))xx2=(4KQ^(2))/a`
`DeltaU=(2KQ^(2))/a=1.8xx10^(8)J=P prop t`
`t=(1.8xx10^(8))/10^(3) sec=1.8xx10^(5)` sec
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