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PLEASE I NEED HELP!!!!!!!!
A swimming pool is an example of an open system. According to the law of conservation of energy, if swimmers add 12,000 J of thermal energy and the surrounding air removes 8,500 J of thermal energy, what is the total change in energy? A. A decrease of 8,500 J
B. A decrease of 3,500 J
C. An increase of 3,500 J
D. An increase of 20,500​

PLEASE I NEED HELPA swimming pool is an example of an open system According to the law of conservation of energy if swimmers add 12000 J of thermal energy and t class=

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Answer:

An increase of 3,500 J

Explanation:

Given that,

Energy added by swimmer = 12000 J

Heat removed by the surrounding = 8500 J

We need to find the total change in energy. It can be calculated using the law of conservation of energy such as :

[tex]\Delta U=Q-W\\\\\Delta U=12000-8500\\\\\Delta U=3500\ J[/tex]

As the change in energy is positive, it means that there is an increase of 3500 J.

Answer:

C. An increase of 3,500 J

Explanation:

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