1. The velocity decreases, and the kinetic energy decreases.
2. An increase in temperature difference between the inside and outside of the building.
3. The total kinetic energy remains the same.
4. 76,761 J
5. The energy loss must increase.
Answer: For ideal machine efficiency = 1. Hence M.A = V. R. The V. R of an ideal machine and the practical machine is a constant or is the same for both
Scientists could investigate this idea by making cathode ray tubes out of different materials to see if the ray was the same.
Answer choice C is a benefit of coal; all the others are negatives.
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