Sliding of molecular layer is much easier than expansion or compression
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B
Resiprocal of bulk modulus is called as compressibility
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C
It is difficult ti twist a long rod as copared to small rod
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D
Holow shaft is much stronger than solid rod of same mass and samelength
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Solution
The correct option is C It is difficult ti twist a long rod as copared to small rod It is incorrect that, it is difficult to twist a long rod as compared to small rod.