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Calculate the Fermi energy and Fermi velocity for copper with 8.5 x 10^28 conduction electrons per cubic metre. Use the density of states function to determine the average spacing between energy levels near the Fermi energy (in a sample of copper of volume 1cm^3).
a glider with mass m= 0.200 kg sits on a frictionless horizontal air track, What is the displacement x of the glider from its equilibrium position when its speed is 0.20 m/s
Two isotopes of carbon, carbon-12 and carbon-13, have masses of 1.993 10-26 kg and 2.159 10-26 kg, Determine the spatial separation between the two isotopes after they have traveled through a half-circle
q1. an electric field is set up between two parallel plates each of area 2.2 m2 by putting 1.0 c charge on one plate
A trayson crystal torpedo, traveling at 2.40 x 10^6 m/s, is lanuched against the Zargon B-Class Warship. How long(in time) must the pusle be to stop the torpedo
A 8000-kg car is traveling at 1.7 m/s along a horizontal road when the brakes are applied. How much kinetic energy does the car lose
A 250g ice cube at -10?C is placed in an aluminum cup whose initial temperature is 70?C. The system comes to an equilibrium temperature of 20?C
What is value of Earths magnetic field
A long cylindrical wire of radius R carries a current I. Let the z axis be a long the axis of the wire. The current density of the wire is j=1/pir^2. Find the current within the cross section of the wire or radius r
What is the magnitude of the net force on the student.What is the magnitude of contact force on the student by the backpack.
The same activity is measured for two different isotope samples. One sample contains 0.0450 kg of (atomic mass = 230.033 937 u, t1/2 = 20.8 days). What is the mass of the second sample
A 1 cm long section of the Achilles tendon stretches to 1.005 cm, What is the strain in this segment of tendon
Westerly winds coming off the Pacific Ocean rise over the Rocky Mountains, what is the surface temperature and relative humidity on the leeward side of the mountains
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