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A tunnel diode junction is approximated by a rectangular barrier 100Å thick and 3.3 eV high. If 1.00 x 1025 electrons strike the barrier each second with kinetic energy 3.1 eV, and the effective electron mass is 0.30m, what current passes the junction?
In an adjustable nozzle for a garden hose, a cylindrical plug is aligned in the direction of the hose and can be inserted into the hose opening. Compute the ratio of the plug radius to the inside hose radius
A 3.1-cm-tall object is 47 cm in front of a converging lens that has a 11.8 cm focal length. Calculate the image position and height
(a) A steel ball is dropped from a height of three meters onto a concrete floor. It bounces a large number of times but eventually comes to rest. Estimate the ball's rise in temperature.
A parallel-plate capacitor is made of two flat metal plates pressed against a thin slab of dielectric material. What is the dielectric constant of the material that was initially used to fill the gap between the plates
a parallel-plate capacitor with area 0.900 m2 and plate separation of 1.00 mm is connected to a 15.00-v battery.a what
The wave function y(x, t) for a certain standing wave on a string fixed at both ends is given by y(x, t) = (0.05 m) sin (1.8 m-1x) cos (400 s-1t). What is the shortest possible length of the string
A toy car is driven by a battery of 9 V. It draws a current of 2mA. What is the resistance of the toy car
The fundamental of an organ pipe that is closed at one end and open at the other end is 265.6Hz (middle C). The second harmonic of an organ pipe that is open at both ends has the same frequency. What is the length of the pipe that is that is open at ..
At what speed does a clock move by respect to an observer that measures it to run at one-third the rate of an identical clock at rest by respect to the observer?
One of the weapons considered for the "Star Wars" antimissile system is a laser that could destroy ballistic missiles. What laser beam intensity will produce such a field
A wheel (radius 0.6 m) is rolling on a horizontal surface with a center of mass acceleration of 0.7 m/s2. find the friction force acting between the wheel and the surface
an object is in front of a converging lens f 0.40 m. the magnification of the lens is m 2.1. relative to the lens
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