Answer:
The answer is D the rising of warm air pushing down cool air.
I would say D. because you round to the nearest whole number and 0.04 is way less than 0.5 which is a good rounding up number.
Answer:
(a) the blocks all had different masses.
Explanation:
The surface is smooth, therefore coefficient of friction is tending to zero.
Forces for each blocks varied from 6N to 8N to 7N to 5N
The blocks were made of different materials and different materials are going to have varying weight for the same size of block.
