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What is the fraction of the electron states occupied by electrons at an energy of E-EF+0.0455eV at T=300K? Use the very accurate value of the Boltzmann constant.
What is the fraction of these states occupied by holes (or empty of electrons)?
What are the electron and hole occupancy fractions if the Boltzmann approximation is made and what are the percentage errors? Explain why one error is negligible while the other is significant?
A 0.050-kg bullet is shot to the right toward a 1.5-kg target initially at rest on a flat frictionless surface. calculate the impulse experienced by the target
An occupant of a car has a chance of surviving a crash if the deceleration all through the crash is not more than 30.00 g. Approximation the force on a 72 kg person decelerating at this rate.
A plano convex lens of focal length 16 cm is fixed on the side of the box with convex surface outside an object is placed at 26 cm from the lens find the position of the image while (1) the box is empty (2) field with water.
A 184.0 g piece of lead is heated to 80.0oC and then dropped into a calorimeter containing 681.0 g of water that initally is at 18.0oC
Three equal positive point charges of magnitude Q = 7.00μ C are located at three corners of a square of edge length d = 11.0 cm. What is the magnitude of the attractive force on the negative charge
two speakers are playing two different but pure frequencies fa 110 hz an a two below middle c and fb 124 hz the b one
A 5 kg uniform cylinder is released at the top of a 1.51 m 21° incline. What is its velocity when it reaches the bottom
A photon is emitted when a hydrogen atom undergoes a transition from the n = 10 state to the n = 4 state. Calculate values for the following. (a) the wavelength nm (b) the frequency Hz (c) the energy of the emitted photon eV
A wildlife researcher is tracking a flock of geese. The geese fly 3.0km due west, then turn toward the north by 50 degrees and fly another 5.0km. What is the magnitude of their displacement
a coil of wire is connected to an ideal 6.0-v battery at t 0. at t 10.3 ms the current in the coil is 200 ma. one
A standard nuclear power plant generates 2.4GW of thermal power from the fission of 235U. Experiments show that, on average, 0.19 u of mass is lost in each fission of a 235U nucleus. How many kilograms of 235U undergo fission each year in this powe..
A flight attendant pulls her 73 N flight bag a distance of 245 m along a level airport floor at a constant velocity. The force she exerts is 45 N at an angle of 54° above the horizontal.
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