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By how much would the air temperature have to decrease to launch the ball? I understand Part A, but I dont know where to go from there. Are you sure you want to delete this answer? For part b, think about how much energy the ball has at 1. This will be potential energy as in mgh. It is not important how the energy was transferred, just that it was and you need to figure out how much. For part c, subtract the energy of part b from the energy of part a, Using this value, calculate the air temp.
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