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Physics, 21.06.2019 19:40
You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j
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Physics, 21.06.2019 21:40
Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?
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Physics, 22.06.2019 03:00
Do you agree with scientist’s prediction about the warming of alaska and other polar regions?
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Physics, 22.06.2019 07:30
The slope of a velocity time graph over any interval of time gives the during that interval
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For a wavelength at the peak of visual sensitivity, 550 nm, how many photons lead to an observable f...
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