Find buoyant force that acts when it is submerged in water
A piece of concrete measures 3 ft by 3ft by 1.25ft. (a) What is its weight? (b) Find the buoyant force that acts on it when it is submerged in water. (c) What is the net force on the concrete piece when it is under water?
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Suppose that two heat engines are connected in series, such that the heat exhaust of the first engine is used as the heat input of the second engine as shown below. The efficiencies of the engines are el and e2 respectively.
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