Answer:
Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work).
Explanation:
It is a measure of how well a machine reduces friction.
A scientific journal article that is peer reviewed. This is because it is more likely not have factual information and sources to that information.
Answer:
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Explanation:
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If light travels from oil to water at an angle, what happens to the direction of the light ray in water with respect to the normal, is it moves away from the normal.
