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Calculate the superconducting energy gap predicted by the BCS theory for a superconductor at T = 0K whose critical temperature Tc = 5.08 K. a) Calculate the frequency of a photon whose energy is just enough to break a Cooper pair in this superconductor
The critical angle of a certain piece of plastic in air is ?c = 37.3º, what is the critical angle if the piece of plastic is immersed in water
The beam emerging from a ruby laser (wavelength 694.3 nm) passes through a circular aperture 6.2 mm in diameter. what is the angular spread of the beam
What is the coefficient of the kinetic friction of the tires and pavement.
A small girl and boy take a sled up to the top of a snow covered slope which is inclined 30 degrees above the horizontal. How fast are they going at the bottom
A sled of mass 5.37 kg is coasting along on a frictionless ice-covered lake at a constant speed of 1.13 m/s. At what speed does the sled move once the book is on it
A fireworks rocket is launched vertically upward at 40 m/s. At the peak of its trajectory, When does the second fragment reach the ground
Light travelling through air enters a certain liquid at an angle of incidence of 43 degrees. What is the index of refraction of the liquid
A 10kg block of ice is placed in a 0.01m^3 vat of boiling water to cool it. What is the final equilibrium temperature of the water
(a) Calculate the R-value of a thermal window made of two single panes of glass each 0.100 in. thick and separated by a 0.200-in. air space. By what factor is the transfer of energy by heat through the window reduced by using the thermal window inst..
If the x position of a particle is measured with an uncertainty of 1.00×10-10 m, then what is the uncertainty of the momentum in this direction
In a certain region, the earth's magnetic field has a magnitude of 4.8 x 10-5 T and is directed north at an angle of 66° below the horizontal. Determine the bullet's electric charge
You are an astronaut (m = 90 kg) and travel to a planet that is the same mass and size as Earth, What is your apparent weight at the equator of this planet
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