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A charged isolated metal sphere of diameter 13 cm has apotential of 7500 V relative to V = 0 at infinity. Calculate the energy density in the electric field near the surface of thesphere.
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Question: A person is diving in a lake in the depth of h = 7.5 m. The density of the water is ? = 1.0 x103 kg/m3. The pressure of the atmosphere is P0 = 1.0 x 105 Pa. The surface area of the top of the person's head is A ...
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