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Question: Schottky vacancies suppose that the energy required to remove a sodium atom from the inside of a sodium crystal to the boundary is 1eV. Calculate the concentration of Schottky vacancies at 300K.
You place 106 moles of hydrogen gas in a balloon of volume 2.4 m3, and find the pressure to be 1.3 times atmospheric pressure. What is the typical speed of a hydrogen molecule
Four rays of light are incident on a surface of water. Their angles of incidence are 20, 30, 45, y 60 degrees. Calculate the angle of refraction for each ray
A step-up transformer increases 18V to 120V. What is the current in the secondary coil as compared to the primary coil? Assume 100% efficiency
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.7 m/s^2 for a height 65.0 cm. What is the speed of the shot when he releases it
In the process of changing a flat tire, a motorist uses a hydraulic jack. She begins by applying a force of 45 N to the input piston, which has a radius r1. find the force that the output plunger applies to the car
Two electrons in the same atom both have n = 9 and = 3. (Keep in mind that the electrons are indistinguishable). How many different states are possible
The figure below shows a conducting rod sliding along a pair of conducting rails. The conducting rails have an angle of inclination of theta= 39.0 degrees. What is the rod's terminal speed?
A person wears a hearing aid that uniformly increases the sound level of all audible frequencies of sound by 27.6 dB. What is the intensity delivered to the eardrum
A 100 W point source radiates yellowish-green light of wavelength 555 nm uniformly in all directions. how far from the source could the light be detected
An infinitely long line of charge has a linear charge density of 5.00×10−12 C/m. A proton is at distance 19.0 cm from the line and is moving directly toward the line with speed 2000 m/s. Explain how close does the proton get to the line of charge?
You have a ball on a wire that is twirled in a circular orbit with a radius of 3.3 m, What is the speed of the ball in orbit
If the mass of Jupiter is 1.8 x 10^27 kg, then find the escape velocity for an object launched from the surface of Jupiter
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