The area of the bar over r=4 is 0.468
The answer for this would be B!!
Anton Von Leeuwenhoek, in the early 1600s, saw these tiny microbes and called them "animalcules" and "wee beasties".
D. According to the hierarchy of needs the body and mind must be taken care of first and foremost.
Answer:
It conserves both energy and momentum in the collision at the same time. By design, when the balls collide the strings that hold them up are vertical (assuming balls are only swung from one side).
Explanation:
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