I think it would be warmer in a grassy field with no wind on a winter day because you'll have sunlight hitting you. However, if you were in a thick forest, all sunlight would be blocked and you would have no warmth from the sun.
Answer
A thin atmosphere does not supply much oxygen, and the heat from the sun would evaporate it, because mercury is close to the sun.
Answer:
It will be A. So since its 2 times more the kinetic energy. But then you have to square it 2^2 = 4
The speed downwards is 7 + (3*9.8)
7+ 29.4 = 36.4 m/s
