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please explain your answer A pot containing 10 kg of water at 20 C is heated unt

ID: 2112002 • Letter: P

Question


please explain your answer

A pot containing 10 kg of water at 20 C is heated until all the water is at 80°C, by placing a resistor (having resistance R 930 2) in the water and running a current through it. What current must be placed through the resistor if the 10 kg of water is to be raised from 20 C to 80 C in 5 minutes? Assume that water has a specific heat of c 4186 J/(kg °C), which is the energy needed to heat one kilogram of water by 1 C (a) 2.0 A (b) 3.0 A (c) 4.0 A d) 5.0 A (e) 6.0 A (f) None of the above.

Explanation / Answer

b