Derive the density of stats function for a zero-dimension quantum dot with a parabolic e-k diagram (hint: a 0-d quantum dot has no free motion of its electrons. thus, all the possible quantum states of the electron are packed into the singularity itself. pay attention to symmetries, if any, and also the 2 spins of the electrons.)
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Physics, 22.06.2019 05:00
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As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
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Where is the potential energy throughout the loading, cocking, and releasing of the trebuchet?
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Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length
Answers: 1
Derive the density of stats function for a zero-dimension quantum dot with a parabolic e-k diagram (...
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