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Q. An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 3.4 m is connected to an electric heater which draws 17.5 A on a 120 V line. How much power is dissipated in the cord?

Q. when 105 mL of water at 22 C is mixed with 68mL of water at 95 C, what is the final temperature? Assume no heat is lost to the surroundings and density of water is 1 g/mL.

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