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1. How well does the nearly free electron model predict the band structure of the Kronig-Penney model plotted in Figure 5.18?
2. Estimate the width of the gap near the corner of the first Brillouin zone for a square two-dimensional crystal. How does this compare with the gap at the middle of a face?
An object of mass m1=4.7 kg moving at 4.7 m/s strikes a stationary second object of unknown mass. What is the energy of the second object
The mass of the sun is 2.0x1030 Kg and the mass ofa hydogen atom is 1.67x10-27 Kg. If we assume that the sun is mostly composed of hydrogen, how many atoms are there in the sun?
A car is initially 4.0km south of a gas station and is moving with a constant speed of 55km/h due north. How far are the vehicles from the gas station when they pass each other
The cookie you will eat after this exam will have a mass of 186 grams. How much energy would this cookie give you
A parachutist with a camera descends in free fall at a speed of 11 m/s. The parachutist releases the camera at an altitude of 140 meter. Find the velocity of the camera just before it hits ground
Two equally charged particles, held 3.4 × 10-3 m apart, are released from rest, what are the mass of the second particle and, the magnitude of the charge of each particle
A spacecraft is in orbit around a planet. The radius of the orbit is 2.9 times the radius of the planet (which is R = 71451 km), What is the period of the spacecraft's orbit
Consider a binary separator used to separate aluminum cans from glass. A total mass of 0.8tone/hr enters. determine what is the recovery of aluminum
A centrifuge in a medical laboratory rotates at an angular speed of 3500 rev/min. When switched off, obtain the constant angular acceleration of the centrifuge
Aluminum wiring rated at 30. A maximum current is to be installed in a home. how thick diameter does the wire have to be
A football kicked off at an angle 20° from the ground reaches a maximum height of 4.7 m. What is the initial velocity of the kick.
charge of 5.00 x 10-9 c and a charge of -4.00 x 10-9 c are separated by a distance of 60.0 cm. find the position at
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