A copper electric kettle weighing 1000 g contains 900 g of water at 20° C. It takes 12 minutes to raise the temperature to 100° C. If electric energy is supplied at 210 V, calculate the strength of the current, assuming that 10% heat is wasted. Specific heat of copper is 0.1.
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the process by which plant prepare their own food with the help of Sunlight is known as photosynthesis the process by which plant prepare their own food with the help of Sunlight is known as photosynthesis
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