Physics, 10.02.2020 23:58 thisusernameistaken2
Why could you hold a stack of books on your head without pain, whereas it would hurt if someone put a small pebble between the book and your head? Why is it so easy to cut yourself with the edge of a piece of paper (a "paper cut")?
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Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley
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Explain why electric current cannot exist if a current doesn't have a voltage source.
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Abeam of light shining from water to air strikes the surface at an angle greater than 48 degrees and produces total internal reflection. if the incident beam is at a 50 degree angle what angle is the reflected beam 13 25 50 100
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