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The Bohr model of an atom assumes that electrons orbit the nucleus, in a manner similar to how planets orbit a sun. Within a hydrogen atom, an electron orbits a proton at a speed of 2.2 x 106 m s-1 in a circular orbit of radius 5.3 x 1011 m.
a) What is the orbital period of the electron?
b) A moving charge constitutes a current. What is the current in this system? c) What is the magnetic field in the center of the atom?
A bicyclist climbs a hill 17 m tall and then coasts down the other side without pedaling. If the cyclist's speed was 2.5 m/s at the top, what is it at the bottom (ignoring friction)?
A man stands on a platform that is rotating (without friction) with an angular speed of 0.361 rev/s; his arms are outstretched, what is the resulting angular speed of the platform
Consider an electron in a square infinite well whose sides have length 0.05 nm. What are the values of the lowest eight eigenvalues
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A 9.00 kg box hangs in static equilibrium. Find the tension in each rope. T1 on the left makes an angle of 15 degrees below the horizontal and is attached to the 9.00 kg box
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A cylinder of mass 8.0 kg rolls without slipping on a horizontal surface. At a certain instant its center of mass has a speed of 11.0 m/s. Determine the translational kinetic energy of its center of mass
A 15-g ball is shot from a spring gun whose spring has a force constant of 600N/m. The spring can be compressed 5 cm. How high can the ball be shot if the gun is aimed vertically
What is the linear speed of the hoop's center of mass just as the hoop leaves the incline and rolls onto a horizontal surface
A 0.40-kilogram ball has a speed of 3 meters per second and collides with a stationary 4-kilogram block, what is the total momentum of the ball and block after the collision
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