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Q1. Regarding the Earth and a cloud layer 750m above the Earth as the "plates" of a capacitor, calculate the capacitance. Suppose cloud layer has an area of 1 km2 and that the air between cloud and ground is pure and dry.

Q2. The plunger of the hydraulic lift in a service station has a diameter of 0.0254 m. it is operated by a compressed air from a tank in which the pressure is 9.315x10^5 N/m^2. the plunger of the rack on which the car rests together weigh 1,336.33 N. what is the heaviest weight of the nearest car that can be lifted?

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