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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 0.5 nm 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.
A capacitor can be made from two sheets of aluminum foil separated by a sheet of waxed paper. what is the capacitance of this capacitor
In the figure below, the converging lens' focal length is 14.4 cm, d = 13.6 cm, and the diverging lens' focal length is -14.1 cm. Where is the image formed by the converging lens,
A box of mass 38.5 kg is sitting on a horizontal table top with a coefficient of kinetic friction between the box and the surface of 0.49. Find the magnitude of the acceleration of the box on the table
Consider a gas of fermions at temperature T=0 in 3D space with dispersion law E(p) = v lpl^3 where v is a constant. calculate the Fermi energy and the ground energy
A baseball has a mass of 140 grams and a softball has a mass of 280 grams. In which of the situations would they both have the same momentum.By how much will a bar long of the same material.
a 20 kg rock is on the edge of a 80 m cliff. the rock falls from the cliff. what speed does the rock have as it strikes
question two identical ships moving at right angles to each othercollide and stick together. one has an initial
a helicopter lifts a 70 kg astronaut 16 m vertically from the ocean by means of a cable. the acceleration of the
the speed of a transverse wave on a string is 479 ms while the wavelength is 0.257 m. the amplitude of the wave is 2.06
A 1.00 kg soccer ball is kicked down field at 5 m/s by a Bob on Team A. Tom, a member of Team B, runs up and kicks the ball so that it is traveling at 15 m/s, what is the impulse acting on the ball
The position of an object connected to a spring varies with time according to the expression x = (4.3 cm) sin(6.9?t). Find the amplitude and frequency of the motion
q1. a 0.440-kg blue bead slides on a frictionless curved wire starting from rest at point where h 1.40 m. at point the
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