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An 8.20 kg crate is pulled up a 30-degree incline by a person pulling on a rope that makes an 17.0-degree angle with the incline. The tension in the rope is 140 N and the crate's coefficient of kinetic friction on the incline is 0.220.
a) What is the work done by friction?
b) What is the work done by the normal force?
Two adjacent resonant frequencies of an organ pipe are found to be 500 Hz and 600 Hz. What is the length of the pipe
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bob walks 240m south then jogs 660m southwest then walks 240m in a direction 29 degrees east of north.a use either
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