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Figure shown a container having liquid o...

Figure shown a container having liquid of variable density. The density of liquid veriesas `rho=rho_(0)(4-(3h)/(h_(0)))`. Here, `h_(0)` and `rho_(0)` are constants and h is measured from bottom of the container. A solid block of small dimensions whose density is `(5)/(2) rho_(0)` and mass m is released from bottom of the tank. Prove that the block will execute simple harmonic motion. Find the frequency of oscillation.
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