A skateboarder applies a force of 850 N to travel 15 m to the top of a hill. In the process he expended 4000 J of energy to overcome friction. How much potential energy would he have as he begins heading downhill? A) 8,750 J
B) 12,750 J
C) 16,750 J
D) 60,000 J

answer; i believe the correct answer is (replication is not conservative);

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.