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1. An n-type Si crystal (1017 donor/cm3) contains 1015 Au/cm3. What are the low level and high level lifetimes of electrons and holes in this sample?
2. Use the analysis procedure and physical model of the thermal and capture emission rates in section 381, obtain the expressions and discuss the physics of the radiative capture and photo emission rates at an optical trap.
A fireworks rocket is launched vertically into the night sky with an initial speed of 43.8 m/s. What is the velocity of the rocket's center of mass before and after the explosion
what is the minimum height you would have to place a solid ball of mass m and radius r i 2mr2 5 on a hill in order
Two identical charged spheres suspended from a common point by two massless strings of length 'l' initially at a distance 'd' apart because of their mutual repulsion. The charge begins to leak from both spheres at constant rate. as a result ch..
light shines through a single slit whose width is 5.5 times 10-4 m. a diffraction pattern is formed on a flat screen
eagan is inspired by performers in the run up of the 2012 london olympics and paralympic games and is determined to
A 0.477 kg block of wood hangs from the ceiling by a string, and a 0.0680 kg wad of putty is thrown straight upward, How high does the putty-block-system rise above the original position of the block
Let x= the radius of earth's orbit=1 Au. and y = the radius of venu's orbit = 0.723 Au. and let d = the distance between venus and earth in AU. What are the largest and smallest values of d
A uniform cable of weight whangs vertically downward, supported by an upward force ofmagnitude wat its top end. What is the tension in the cable at its top end
On a spacecraft two engines fire for a time of 479 s. One gives the craft an acceleration in the x direction of ax = 4.99 m/s2, Find the magnitude of the initial velocity
You are given three resistors with the following resistances: R1 = 4.10 ?, R2 = 8.84 ?, and R3 = 3.08 ?. What is the smallest resistance you can assemble using these three resistors
Estimate the radiation pressure due to a bulb that emits 25 W of EM radiations at a distance of 4.0cm from the center of the bulb
A 3.0-nC point charge is located at the origin in the xy-plane. If a second point charge of 3.0 nC is placed at the location where you calculated the electric field in part (a), what will be the magnitude of the force on this second charge due to t..
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