Asmall block with mass 0.0475 kg slides in a vertical circle of radius 0.425 m on the inside of a circular track. during one of the revolutions of the block, when the block is at the bottom of its path, point a, the magnitude of the normal force exerted on the block by the track has magnitude 3.95 n . in this same revolution, when the block reaches the top of its path, point b, the magnitude of the normal force exerted on the block has magnitude 0.670 n. how much work was done on the block by friction during the motion of the block from point a to point b?

Ineed this now one scientist feels that the changes in global climatic patterns may be good for the health of the biosphere. another scientist feels that sharp changes in climatic patterns could result in the extinction of the biosphere. which of these is the most likely reason the two scientists gave conflicting opinions on the impact of changes in the global climatic pattern? they do not have enough knowledge on the topic. they did not discuss the issue among themselves. they believe conflicting opinion strengthens science. they study different areas of science and have different scientific focuses.