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Calculate the density of states for electrons trapped in an infinitely deep two-dimensional 11 x 9 nm well. The energies of the subbands are given in equation (4.60). Compare it with the three-dimensional result (converted to a density per unit length).
A 1055-kg van, stopped at a traffic light, is hit directly in therear by a 675-kg car traveling with avelocity of +2.45m/s. What is the final velocity of each vehicle
A 2.0 kg mass traveling at 3.0 m/s strikes another 2.0 kg mass traveling at -1.0 m/s. They collide and have a complete elastic collision. what does the first mass do
An electron is confined to a one-dimensional region in which its zero-point (n = 1) energy is 2.90 eV. What is the length of the region
If the pipe is open at one end only, how many harmonics are possible in the normal hearing range from 20 to 20000 Hz
A flat sheet of sodium chloride has a thickness of 2.50 cm. It is on top of a flat sheet of fused quartz that has a thickness of 1.26 cm, how far (in cm) would it have traveled in a vacuum
An ideal heat-engine is to be used in an environment where the ambient temperature is 22.50 °C. What must be the minimum temperature of the hot heat reservoir in order to reach at least 46.40 percent efficiency with heat-engine? (Give the answer i..
Assuming that the earth is of uniform density inside, find the kinetic energy of the earth due to its yearly motion around the sun. Assuming that the earth is of uniform density inside, find the kinetic energy of the earth due to its daily spin on i..
The wave length of an electromagnetic wave is gauged to be 300m> what is the frequency of the wave. What type of EM wave is it?
A rope is used to pull a 4.56 kg block at constant speed 5.47 m along a horizontal floor. find the work done by the rope's force
a blue ball is thrown upward with an initial speed of 23.2 ms from a height of 0.6 meters above the ground. 2.8 seconds
The acceleration due to gravity on Mars is 3.8 m/s2. If the Curiosity rover on Mars drops a tool from a height of 2.35 m, how long does it take to hit the ground
A rectangular loop of width a and length b is located near a long wire carrying a current I (Fig. 30.22). The distance between the wire and the closest side of the loop is c. The wire is parallel to the long side of the loop. Find the total magnet..
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