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Q. If 20 grams of hot water at 80°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity? How much ice must melt in order to cool the hot water down to this temerature?

Q. A negative charge of -2.0 x10-4 C and a positive charge of 9.0 x10-4 C are separated by 0.26 m. What is the force between the two charges?

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