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In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.18 106 m/s. Find the force acting on the electron as it revolves in a circular orbit of radius 5.34 10-11 m.
What is acceleration of the elevator
A block of mass 0.540 kg is pushed against the horizontal spring of negligible mass until the spring is compressed a distance x. The force constant of the spring is 450 N/m.
The core of an optical fiber has an index of refraction of 1.27, What is the critical angle for total internal reflection at the core-cladding interface
A railroad car of mass 3.3 104 kg moving at 4.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
Vertically polarized light with an intensity of .60 W/m^2 passes through a polarizer whose transmission axis is at an angle of 35 degrees with the vertical
Two converging lenses having focal lengths of f1 = 10.9 cm and f2 = 20.0 cm are placed d = 50.0 cm apart. What is the overall magnification of the system
A solid sphere of radius = 8 cm and mass = 5 kg is sitting on a level table and is attached with a string over a pulley, Calculate the final angular and linear speeds of the sphere
A 1.3-kg 16-cm-diameter solid sphere is rotating about its diameter at 69 rev/min. what is the new angular speed of the ball
In a closed circuit (that consists of a electric heater, a metal conducting rod, and two rails), it must have an outside force applied to keep the rod moving at a constant speed. What is the velocity of the moving conducting rod
A 50.0-g bullet is shot straight upward with a muzzle speed of 350 m/s. Find the maximum height the bullet can reach
what is the magnitude of the average acceleration of a skier who, How far did the skier travel in this time
The generator at a power plant produces AC at 24000 V. A transformer steps this up to 345,000 V for transmission over power lines. how many turns must there be in the output coil
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