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A cast iron saucepan of mass 4.4 kg is filled with 20 L of water at...

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Mechanical Engineering

A cast iron saucepan of mass 4.4 kg is filled with 20 L of waterat 25 °C, placed on an electric hotplate, and initially brought upto boiling point. Further heat is applied until half of the waterhas boiled off. What is the cost of the energy used if electricitycosts 30 cents per kWh and the hotplate has an efficiency of75%?

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