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An interesting (but oversimplified) model of an atom pictures an electron "in orbit" around a proton. Suppose this electron is moving in a circular orbit of radius 0.32 nm (3.2 x 10-10 m) and the force that makes this circular motion possible is the electric force exerted by the proton on the electron. Find the speed of the electron.
if a drage car had a constant acceleration throughout a quarter mile (402 m) race, what would be the top speed reached
a 0.060 kg tennis ball, initially moving at a speed of 10 m/s, What is the change in momentum of the ball in kg m/s
Many communications satellites orbit the earth in geostationary orbits. (They appear to remain in the same positions in the sky for observers on the earth's surface.) If such a satellite orbits at a height of 40,000 km, estimation the time delay in a..
A certain lightbulb is rated at 175.0 W when operating at an rms voltage of 120 V. What is the peak voltage applied across the bulb
Estimates is the acceleration of the object.
A negative point charge q1 = -4 nC is on thex-axis at x = 0.60 m. A second point charge q2=-24nC is on the x-axisat x = -1.20 m. What is the net electric field at the origin
A sand mover at a quarry lifts 2.00E3 kg of sand per minute averticle distance of 12.0 m. What is the minimum power that must besupplied to this machine
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. What is the magnitude of the tension in the wire
For the motion along the inclined plane, should the maximum kinetic energy of the cart be equal to the potential energy of the compressed spring (under ideal conditions)?
A future geosynchronous space station will be used to collect solar energy. The energy is transmitted back to earth as an electromagnetic beam. how large are the station's solar panels, assume 100% efficiency
The radius of a typical human eardrum is about 4.0 mm. Find the energy per second received by an eardrum when it listens to sound that is at the threshold of hearing. Find the energy per second received by an eardrum when it listens to sound that is..
A proton is shot at 8 × 107 m/s toward a gold atom, with a mass 197 times that of the proton, What is the recoil speed of the gold nucleus
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