Answer:
A. Smaller, Larger
Explanation:
Every object that has mass obeys the Law of Universal Gravitation. Everything attracts everything else. The same gravity that keeps us down on the ground keeps planets in orbit. However, in space, the smaller object will feel the pull of the larger one much more strongly, which is why it will begin to orbit it
Answer:
1056.8 kJ
Explanation:
A sample of gas in a cylinder is provided with 623.9 kJ of heat. By convention, when the gas absorbs heat, it takes a positive sign, so Q = 623.9 kJ.
A piston then compresses the gas by doing 432.9 kJ of work to the gas. We work is done on the gas, it takes a positive sign, so W = 432.9 kJ.
The change in the internal energy (ΔU) is:
ΔU = Q + W
ΔU = 623.9 kJ + 432.9 kJ = 1056.8 kJ
Endothermic because the separation of the ions dictate the overall reaction
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