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Two semiconductor materials have exactly the same properties except that material A has a bandgap of 0.8eV and material B has a bandgap of 1.2 eV. What will the ratio of intrinsic carrier concentrations be between material A and B at T=350K? Please show your work.
A 0.50kg ball with a speed of 10m/s hits a wall and bounces back with only 0.75 of the original speed. How much kinetic energy is lost in the balls collision
150 ml of water at 5.00C is placed in the freezer compartment of a refrigerator with a coefficient of performance of 6.00. How much heat energy is exhausted into the room
Suppose that when a certain sound intensity level (in dB) doubles, the sound intensity (in W/m2) triples. Determine this sound intensity level
A sled weighing 61.0 N is pulled horizontally across snow so that the coefficient of kinetic friction between sled and snow is 0.100. A penguin weighing 67.0 N rides on the sled, as in the figure below. If the coefficient of static friction between p..
A 0.600 kg ball falls directly down onto concrete, hitting it with a speed of 13.5 m/s and rebounding directly upward with a speed of 3.00 m/s. What is the impulse on the concrete
A 100kg hollow sphere is neutrally buoyant and completely underwater. It's volume is 0.5 cubic meters. If this 0.5 cubic meter space is filled with a combination of helium and water, what fraction of this volume is helium?
A cyclist is traveling at an initial speed of 10.0m/s. She accelerated at a rate of 0.500m/s^2. What is her final speed after 9.
there is an oscillating simple pendulum slowing down. assuming time starts when the pendulum is released find an
An ideal fluid flows at 12 m/s in a horizontal pipe. If the pipe narrows to half its original radius, what is the flow speed in the narrower section
A bar magnet is oriented with its magnetic dipole moment at 38.5° to the direction of a 0.0145-T magnetic field, Find the magnitude of the magnet\'s magnetic dipole moment
How much would a 80.0 kg person weight on Mars, where the acceleration of gravity is 3.93 m/s^2, and on Earths Moon, where the acceleration of gravity is 1.63 m/s^2.
An artificial satellite circling the Earth completes each orbit in 133 minutes. Find the altitude of the satellite
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