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Define Bulk modulus and give its SI unit...

Define Bulk modulus and give its SI unit.

Text Solution

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It is ratio of normal stress to the volume strain.
i.e. Bulk modulus (B)= `("Normal stress")/("Volume strain")=(F//A)/(-(Delta V)/(V))`
`B= -(FV)/(A Delta V)= -(PV)/(V)`
Negative sign indicates decrease in volume with increase in pressure. SI unit is N `m^(-2)`
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