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A stone is dropped from the roof of a building; 1.20 s after that, a second stone is thrown straight down with an initial speed of 22.0 m/s , and the two stones land at the same time.
How long did it take the first stone to reach the ground?
How high is the building?
What are the speeds of the two stones just before they hit the ground?
A person in an elevator is holding a 25 kg block by a cord rated to withstand a tension of 335 N. Starting from rest, the elevator begins to move upwards at a constant acceleration and the cord holding the block breaks. What was the least accelera..
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a classic 1957 chevrolet corvette of mass 1240 kg starts from rest and speeds up with a constant tangential
A coal fired plant generates 600 MW (5.18 x 10^13 J/day) of electric power. The plant burns 4.8 x 10^6 kg of coal each day. what is the ideal efficiency of this plant
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An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.962c. Calculate what is the dilated lifetime
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