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Assuming friction is negligible, if a lever has a mechanical advantage of 5, how much effort in newtons is needed to lift a 10 newton load?

2 Newtons

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While at Berkeley, Melvin Calvin used this radioisotope to decipher many of the complex processes of photosynthesis:	The throbbing caused by sounds of slightly different frequencies that results because of periodic constructive and destructive interference is called: