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Q. A stone is dropped into a mine shaft 350m deep. the temperature is 5.0 degrees C. how many second pass before the stone is heard to strike the bottom?

Q. A vessel whose walls are thermally insulated contains 2.10 of water and 0.450 of ice, all at a temperature of 0.0 . The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted into the water.

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