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Consider a wide-gap degenerate n-type semiconductor with a bandgap of Eg=3.5 eV. Given a constant effective mass Mn*=0.2 m in the entire conduction band (i.e. a parabolic E-k relationship), calculate the absorption threshold in terms of the free electrin concentration n. Assume the zero-temperature approximation to the fermi function F(E)=o for E.Ef, and F(E)=1 for E<Ef
The inside of the cylindrical can shown above has cross-sectional area 0.005 m^2 and length 0.15 m. The can is filled with an ideal gas and covered with the loose cap. The gas is heated to 363K and some is allowed to escape from the can so that re..
The three charged particles in the figure below are at the vertices of an isosceles triangle (where d = 1.60 cm). Taking q = 8.20 µC, calculate the electric potential at point A
If the bullet leaves the gun at a speed of 280 m/s, by how much will it miss the target? Illustrate at what angle should the gun be aimed so as to hit the target?
If the percentage standard error in measuring voltages and currents is 2%, the percentage standard error in measuring the radius of the path is 3%, what is the percentage standard error in finding e/m
two 1.3kg masses are 1.2m apart (center to center) on a frictionless table. Each has + 9.2?Cof charge, What is the magnitude of the electric force on one of the masses
An LRC series circuit with R= 150 ohms, L= 25 mH and C= 2 mF is powered by an AC voltage source of peak voltage Vo= 340 V, Determine the peak current that flows in this circuit
An electron of mass 9.11×10?31kg leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, Find the net force. (You can ignore the gravitational force on the electron)
A piece of Nichrome wire has a radius of 5.00 x10-4 m. It is used in a laboratory to make a heater that uses 2.00 102 W of power when connected to a voltage source of 120 V. Ignoring an effect of temperature on resistance, estimate the necessary l..
A 6 m long 50 kg ladder leaning on a frictionless wall can successfully be scaled by a 120 kg man. What is the minimum angle between the ladder and the floor
Illustrate what effect does this transaction have on revenue or expense for the period?(b) Illustrate what effect does it have on stockholder's equity?
A 32.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 21.00 m. Calculate the mechanical energy lost due to friction
A 4.8-kg bucket of water is raised from a well by a rope. find the force exerted by the rope on the bucket
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