In an inertial frame of reference, a series of experiments is conducted. In each experiment, two or three forces are applied to an object. The magnitudes of these forces are given. No other forces are acting on the object. In which cases may the object possibly move at a constant velocity of 256m/s?
(1) 2 N; 2 N
(2) 200 N; 200 N
(3) 200 N; 201 N
(4) 2 N; 2 N; 4 N
(5) 2 N; 2 N; 2 N
(6) 2 N; 2 N; 3 N
(7) 2 N; 2 N; 5 N
(8) 200 N; 200 N; 5 N
Answers: 1
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Physics, 22.06.2019 20:50
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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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