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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 temperature?

Q. A planet's moon travels in an approximately circular orbit of radius 9.0 107 m with a period of 6 h 44 min. Calculate the mass of the planet from this information.

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Category:- Physics
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