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Physics, 23.06.2019 07:30
Aspring has a relaxed length of 33 cm (0.33 m) and its spring stiffness is 6 n/m. you glue a 76 gram block (0.076 kg) to the top of the spring, and push the block down, compressing the spring so its total length is 15 cm. you make sure the block is at rest, then at time t=0 you quickly move your hand away. the block begins to move upward, because the upward force on the block by the spring is greater than the downward force on the block by the earth. calculate y vs. time for the block during a 0.09-second interval after you release the block, by applying the momentum principle in three steps each of 0.03-second duration.
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Physics, 23.06.2019 15:30
35 grams of salt is dissolved in 500 grams of total solution. what is the percent by mass of salt?
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Physics, 23.06.2019 18:30
What is the displacement of an object that starts at the origin and moves to position -8 m? (show all work)
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(a) if th = 1100 k and tc = 400 k, what is the thermal efficiency?...
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