Physics, 22.10.2019 20:00 ericamiller165p58e0p
To pull a 53 kg crate across a horizontal frictionless floor, a worker applies a force of 180 n, directed 35° above the horizontal. as the crate moves 2.9 m, what work is done on the crate by (a) the worker's force, (b) the gravitational force on the crate, and (c) the normal force on the crate from the floor? (d) what is the total work done on the crate?
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Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?
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To pull a 53 kg crate across a horizontal frictionless floor, a worker applies a force of 180 n, dir...
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