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Q. A cylindrical container 1.6 m tall contains mercury to a certain depth d. The rest of the cylinder is filled with water.

If the pressure at the bottom of cylinder is two atmospheres, what is the depth d?

Q. A mass-spring system oscillates with amplitude of 3.0 cm. If the spring constant is 231 N/m and the mass is 405g, establish the mechanical energy of the system.

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