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A certain semiconductor device requires a tunneling probability of T=10^-5 for an electron tunneling through a rectangular barrier with a barrier height of Vo=0.4eV. The electron energy is 0.04eV. Determine the maximum barrier width?
A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 81 cm from the center of the mirror, What is the magnification of the pencil's image
A running back with a mass of 82 kg and a velocity of 9 m/s (toward the right) collides with, What is the velocity of the tackle before the collision
What is the charge density on the surface. suppose that air resistance can be neglected.
A 7.55-g bullet from a 9-mm pistol has a velocity of 389.0 m/s. It strikes the 0.745-kg block of a ballistic pendulum, what was the velocity of the bullet as it emerged from the block
The coeficient of friction on a horizontal cicular track, radius 0.25 km, is 0.7. How fast can a car go around skidding out
How to create a condition of weightlessness inside aircraft
A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. 3.4 J of work is required to compress the spring by 0.18 m. Find the value of the mass
An object oscillates in 1-D with an amplitude of 10 cm. At t = 0 s, its position is x = - 5 cm, What is the velocity of the object
A rifle with a barrel length of 56 cm fires a 14 g bullet with a horizontal speed of 350 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 13 cm.
question1find out the coefficient of kinetic friction between a 3.15 kg block and horizontal surface on which it rests
After being accelerated to a speed of 1.76×105m/s , the particle enters a uniform magnetic field of strength 0.800T and travels in a circle of radius 35.0cm, Find the ratio m/q for this particle
A 16.5 kg gold bar at 27 °C is placed in a large, insulated 0.800 kg glass container at 15°C with 2.00 kg of water at 25.0°C. Compute the final equilibrium temperature.
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