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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 student removes a 10.50 kg stereo from a shelf that is 1.802 m high. The amplifier is lowered at a constant speed to a height of 0.75 m. What is the work done by a) person and b) gravitational force that acts on the amplifier.
Two equal small spherical conductors (point charges) separated by 0.60 meter, carry a total charge of 200 μC. Evaluate what the charge on each sphere
The morning sounding shows an is othermal layer from 800 to 700 mbat -11oC, and the temperature in the layer from 390 to250 mb decreases steadily from -47 to -55oC. What is the thickness of these layers?
When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). find the mass of the ball
A cheerleader waves her pom-pom in SHM with an amplitude of 18.8 cm and a frequency of 0.870 hz. Find the maximum magnitude of the velocity
A 68.0 patient is suspended in a raised hospital bed (angle is 50 degrees). The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the patient and the bed are 0..
An olympic diver springs off of a high dive that is 3m above the surface of the water. When she lands in the water she is traveling at a speed of 8.9 m/s at ana ngle of 75.0degrees to the horizontal. what was take offf speed and direction?
A skydiver reaches a "terminal velocity" of 120 km/h. If the skydiver has a mass of 59kg, what is the magnitude of the upward force on the skydiver
A fighter jet is launched from an aircraft carrier with theaid of its own engines and a steam-powered catapult. Thethrust of its engines is 2.3x105N. What is the work done on the jet by the catapult
A parallel-plate capacitor is charged and then disconnected from the battery that charged it. A teflon layer is inserted between the plates
A 775-g object undergoes an acceleration given by = (2.00 ? + 5.00 ?) m/s , find the resultant force acting on the object
A microwave oven is powered with an electron tube called a magnetron, which generates electromagnetic waves of frequency2.75 GHz. The microwaves enter the oven and are reflected with the walls. The standing wave pattern produced in the oven can cook ..
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