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In heavily doped n-type silicon, there are 1016 electrons per cm3 at room temperature. The donor level is located 0.05 eV below the conduction band. The current carrier concentration as a function of temperature may be expressed as n = n0 e-Eg/2KbT. At what temperature are there essentially no charge carriers (< 1 cm-3 )?
Nonreflective coatings on camera lenses reduce the loss of light at the surfaces of multilens systems and prevent internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride
A certain bivalent metal has a density of 6.458 g/cm3 and a molar mass of 92.8 g/mol. Calculate the number density of conduction electrons
The current in an electro magnet connected to a 240 V line is 14.5A.At what rate must cooling water pass over the coils if the water temperature is to raise by no more than 7.50C ?
A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 56.0 m/s and returns the shot with the ball traveling horizontally at 42.0 m/s, What work does the racket do on the ball
A woman stands on the edge of a cliff and throws a stone vertically downward with an initial speed of 10 m/s. the instant before the stone hits the ground below, it has 450 j of kinetic energy. if she were to throw the stone horizontally outward from..
In an experiment in physics class, a model solid-fueled rocket is fired vertically with an acceleration of 3 m/sec2 for 6 seconds. After that time, What is the maximum altitude the rocket reaches
A mass is hung from a 25 centimeter string. The string is pulled aside a distance of 1.5 centimeter and released. Find what is the period of oscillation
a construction worker attempts to lift a uniform beam off the floor and raise it to a vertical position. the beam is
Derive an expression for spring potential energy (Us), where the spring force is Fs = -kx and delta U = -Wc, where Wc is the work done by conservative forces
An air bubble of 10 cm^3 is created at bottom of a lake, where the temperature is 5 degree celsius and is 100 m deep. what is the pressure at the bottom
Three forces are applied to a tree sapling, to stabilize it. If F1= 282 N and F2= 355 N, find F3 in magnitude and direction. The angle between F1 and F2 is equivalent to 110 degrees.
What is the current through, voltage across, and power dissapated in R2? What is the current through, voltage across, and power dissapated in R3?
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