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Question: A Czochralski crystal is pulled from a melt containing 1015 cm-3 boron and 2 X 1014 cm-3? phosphorus. Initially the crystal will be P-type but as it is pulled, more and more phosphorus will build up in the liquid because of segregation. At some point the crystal will become N-type. Assuming ko = 0.32 for phosphorus and 0,8 for boron, calculate the distance along the pulled crystal at which the transition from P- to N-type takes place.
an initially uncharged electroscope is polarized by bringing a negatively charged rubber rod near the bulb. if the bulb
What the stopping distance of the car is as measured from the point where the driver first notices the red light.
A race car moves 85 km/h at 55 degrees North of E. What are the E-W and N-S components of its velocity?
Draw a free body diagram for both parts of this question, also include the formulas Fnet=ma and Fnet = F1 + F1, and any other formulas used:
Determine the principal stress, the maximum in-plane shear stress, and average normal stress. Specify the orientation of the element in each case.
A beam of electrons traveling with speed 0.8 x10^(8) m/s passes through a slit of width 10^(-5) m. Because of the uncertainty in the lateral position of the beam, there will be an uncertainty in the transverse momentum as well.
Illustrate what is the tangential velocity of the bug? One second after the bug starts from rest, what are its tangential acceleration, radial acceleration, and total acceleration(with the degree)
Determine what fraction of a sample of carbon-14 is left after 21487.5 yr. (The half-life of carbon-12 is 5730 yr.)
an initially empty bottle is filled with water from a line at 0.8 mpa 350 deg c. assuming no heat transfer and that the
A 100 gram bullet travelling at 350 m/s strikes and sticks into a stationary 5.00 kg block of wood. The combined bullet+ block initially slides on a horizontal frictionless surface until they encounter a 30.0 degree inclined plane with a coefficient ..
A long, current-carrying solenoid with an air core has 1780 turns per meter of length and a radius of 0.0130 m. What is the mutual inductance of this system
q1. when two tuning forks of 128 hz and 149 hz respectively are sounded simultaneously how various beats per second are
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