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Consider a free electron gas model for noninteracting electrons ina two-dimentional infinite square well. Calculate the Fermi energyEf of the system. Let σ be the number of freeelectrons per unit area(i.e ,σ =Nq/A, where A is the area ofsquare well and Nq the total number of electrons)
A hurricane-force wind of 220 blows across the face of a storefront window. Estimate the force on the 2.2 3.5 window due to the difference in air pressure
a radar station locates a sinking ship at range 14.2 km and bearing 136deg clockwise from north. from the same station
A plate carries a charge of -3.11mC,while a rod carries a charge of +2.02mC.How many electrons must be transferred from the plate to the rod,so that both objects have the same charge.
The treasure map in the figure gives the following directions to the buried treasure: "Start at the old oak tree, walk due north for 550 paces, How far should you go to reach the treasure
a 0.145-kg baseball pitched horizontally at 39 ms strikes a bat and is popped straight up to a height of 41 m. if the
The bullet becomes embedded in the block. If bullet-block system compresses the spring by a highest of 88.0 cm, what was the speed of the bullet at impact with the block.
charge Q is placed at a vertex of a cube with side length, what is the electric flux through each face of the cube
An electron is in the first excited orbit of hydrogen, corresponding to n = 2. Find the radius of the orbit.
a meterstick is moving by an observer in a direction parallel to its length. the speed of the meterstick is .49c. what
The robot HooRU is lost in space, floating around aimlessly, and radiates heat into the depths of the cosmos at the rate of 12.9 W. What is HooRU's temperature
Estimate the average speed of the Apollo spacecraft in meters per second, given that the craft took five days to reach the Moon from Earth
You are holding a 5 kg dumbbell straight out at arm's length. Assuming your arm is 0.62 m long, what torque is the dumbbell exerting on your shoulder
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