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mass of a sample of mercury

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(1) The density of mercury is 1.36 x 10^4 kg/m^3.
What is the mass of of a 4.00 10^-4 -m^3 sample of mercury?

(2) A force of 250N is applied to a hydraulic jack piston that is 0.01m in diameter. If the piston which supports the load has a diameter of 0.10m, approx. how much mass can be lifted by the force? Ignore any difference in height between the pistons.

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The solution explains how to find the mass of a sample of mercury. The second part shows the calculation of lifting force of a piston. Please see attached file for details.

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