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The binding energy of an electron trapped to a sulfur double donor S+6 in Si was measured by Prof. Sah and his graduate students at Illinois in 1971 using the photo capacitance transient method they invented and found to be 613.26 meV.
Assume that the static dielectric constant Is valid for screening the As core charge by the valence electrons and Is given by ε1/ ε0 = 11.8.
What is the orbit radius of an electron trapped at the ground state? How many valence electrons are enclosed in the Bohr sphere or in the spherical volume enclosed by the trapped electron orbit? Is the assumption on the static dielectric constant reasonable and why?
Suppose that protons are fired towards the large flat side of a charged conducting plate. How long does it take for the particles to hit the plate
A 200 kg bucket of cement is accelerated upward by a force of 2200 N. the acceleration continues for 5 s. the power needed at the end of this period is
Two 10 meter parallel wires are located at a distance 0.4 meter and carry 20 Amp current in opposite directions. Evaluate strength of the magnetic field at a point
a tray is moved horizontally back and forth in simple harmonic motion at a frequency of f 1.83 hz. on this tray is an
If a vehicle is traveling at velocity v and takes a distance d to stop, then how fast is a vehicle traveling if it takes a distance of 3d to stop. suppose mass and acceleration are equal.
On a banked race track, the smallest circular path on which cars can move has a radius of 103 meter, while the largest has a radius of 165 meter. Determine the largest speed at which cars can move on this track without relying on friction
Two trains on separate tracks move toward each other. Train first has a speed of 124 km/h; second train a speed of 68.0 km/h. Obtain the frequency heard by the engineer on first train
A series ac circuit contains a 270-\;{\rm{ }}\Omega resistor, a 10.0-\;{\rm mH} inductor, What is the average power delivered to the resistor, to the capacitor, and to the inductor
If the welding arm moves 3.00 centimeter west, 4.00 centimeter north, and then 6.00 centimeter east, compute the resultant displacement and the total distance traveled by the welding arm
Consider two particles, each with a charge of +Q located at the opposite corners of a square of side d. What is the direction of the net electrical field at point P
Two wheels have the same mass and radius of 4.8 kg and 0.54 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a constant angular acceleration with respect to a rotational..
A copper wire has a square cross section a on a side. The wire is L long and carries a current of I. The density of free electrons is ne. Estimate the magnitude of the electric field in the wire
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