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Problem 1: The electron energy near the top of the valence band in a semiconductor is given by
ε = -10-37k2J
where k is the wavevector. An electron is removed from the state
k = 109k^xm-1
where k^x is a unit vector along the x axis. Calculate (a) the effective mass, (b) the energy, (c) the momentum and (d) the velocity of the resulting hole.
Problem 2. Indium antimonide has dielectric constant ε = 17 and electron effective mass mc = 0.014m. Calculate:
(a) the donor ionization energy,
(b) the radius of the ground state orbit, and
(c) the donor concentration at which orbits around adjacent impurities begin to overlap. What effects occur at about this concentration, and why?
Problem 3. Use the data to estimate a value of the donor ionization energy for arsenic Impurities in germanium.
A 0.6410-kg ice cube at -12.40°C is placed inside a chamber of steam at 365.0°C. Later, you notice that the ice cube has completely melted into a puddle of water.
A second package is throw downward from the plane with a vertical speed V1=58 m/s. find the horizontal distance traveled by this package
A 100g aluminum (c=900J/kg C) calorimeter contains 250 g of water (c = 4186J/kg C). The two substances are in thermal equilibrium at 10 degrees C. Two metallic blocks are placed in the water.
Two rigid rods are oriented parallel to each other and to the ground. The rods carry the similar current in the same direction. The length of each rod is 0.90 m, and the mass of each is 0.062 kg. One rod is held in place above the ground, while the o..
What is the angular momentum of a figure skater spinning at 2.0rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 15cm , and a mass of 48kg ? How much torque(in magnitude) is required to sl..
A car moving at a constant speed of 30m/s suddenly stalls at the bottom of a hill. Determine the maximum distance traveled by the car up the hill after stalling
A satellite is orbiting the Earth at a distance of 2.67RE and with a speed of 4.29 km/s. With what speed would the satellite hit the Earth's surface
Monochromatic light strikes a diffraction grating at normal incidence before illuminating a screen 2.17 m away. What is the distance between the two second-order maxima
A ring of radius R has total charge Q. Determine the electric field strength at this point
A bicycle is turned upsdie down and has one wheel spinning at 95.0 rpm. The wheel slows uniformly to a stop in 45.0 seconds. If the wheel were on the ground, what linear distance (in meters) would it travel
Two railroad cars, each of mass 6400 kgare traveling 94 km/h toward each other.They collide head-on and come to rest. How much thermal energy is produced in this collision
A flat coil of wire is used with an LC-tuned circuit as a receiving antenna. The coil has a radius of 0.35 m and consists of 480 turns. find the magnitude of the average emf induced in the antenna
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