In a thermally insulated cylinder under a weightless moving piston there is 30 g of water at a temperature of 0 ° C, and the piston lies on the surface of the water. The water is heated with an electric boiler, the resistance of which is r = 100 ohms. To what height will the piston rise if the external pressure is 1 atm, and a current of 2 A flows through the boiler for 1 minute? Piston area 512 cm2. The specific heat of vaporization of water is 2.25 kJ/g.

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