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Compute the bandwidth estimated by the tight-binding model using the tunneling formula. Let a=2.35A and W=10eV. What is the value of W necessary to obtain the valence bandwidth of Si, 12eV?
Sketch the detailed periodic potential for this model Si? Is this value of W reasonable and why? How does the bandwidth vary with interatomic spacing a.
You are lowering two boxes, one on top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp. What is the magnitude of the friction force on the upper box
If the image of the truck is approaching the vertex of the mirror at a speed of 2.0 m/s when the truck is 2.0 m away, what is the speed of the truck relative to the highway?
The former is on the left in contact with air and the other in contact with a liquid of index 1.4 The refractive index of the glass is 1.50. Find the positions of the foci, principal planes, and focal length of the system.Use the matrix approach
you need to build an ammeter that can measure up to 0.5 a. you are given a galvanometer that reads 75 a at its
a window washer is standing on a scaffold supported by a vertical rope at each end. the scaffold weighs 200 n and is
On a very muddy football field, a 100kg linebacker tackles an 85kg halfback. What is the direction of this velocity
a platinum resistance thermometer has resistances of 170.0 when placed in a 0degc ice bath and 244.8 when immersed in a
A -5.00 C point charge (Q1) is placed at the center of a conducting spherical shell with inner radius a and outer radius b. A total of +3.00 C charge(Q2) is placed on the conducting shell itself. What is the total charge on the outer surface of th..
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 58.8°, Obtain the speed of light in the material
After having collected samples along the shore all day long, a marine biologist walks back to her campsite, 1.69 km away. What distance did the dog run
A diving board is fixed to a point in a concrete block. A diver bounces 15.0centimeter from the free end of the diving board. Find how much force will the fulcrum exert on the diving board if it is set at a point 1.05 m from the fixed end
The mass of a robot is 5220 kg. This robot weighs 2650 N more on planet A than it does on planet B. Both planets have the same radius of 2.26 × 107 m
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