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A swimming pool is an example of an open system. According to the law of
conservation of energy, if swimmers add 1,500 J of thermal energy to the
pool and the surrounding air adds 2,500 J of thermal energy, what is the total
change in energy?
OA. An increase of 1,500 J
B. An increase of 2,500 J
OC. An increase of 1,000 J
OD. An increase of 4,000 J

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