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An electron and a positron are separated by distance r. Find the ratio of the gravitational force to the electric force between them. From the result, what can you conclude concerning the forces acting between particles detected in a bubble chamber? (Should gravitational interactions be considered?)
The driver of a 1400 kg car, initially traveling at 12.1 m/s, applies the brakes, bringing the car to rest in a distance of 19.0 m. Find the net work done on the car
Two radio antennas are separated by 2.0 m. Both broadcast identical 750 MHz waves. If you walk around the antennas in a circle of radius 10 m, how many maxima will you detect?
if you add 1 kg of stainless steel at 100 degrees celsius to 5 kg water at 20 degrees celsius, What is the specific heat of stainless steel
A hydrogen atom is excited to the n = 11 level. Its decay to the n = 7 level is detected in a photographic plate. Obtain the wavelength of the detected emission
an infinitely wide charged non-conducting slab with a non-zero thickness is centered over the xy plane as described.
A passenger walks from one side of a ferry to the other as itapproaches a dock. what are the direction and magnitudeof the ferry's velocity relative to the water
Two long, straight wires are parallel to the x-axis, a distance 2a away from each other. What is it a distance a below the lower wire? Express these vectors in unit vector notation
the hall-effect is used to determine the mobility of holes in a p-type silicon. assume the bar resistivity is 20000 ohm
A 1.9-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. What is the elastic potential energy of the system
A playground merry-go-round has a radius of 4.60 m and a moment of inertia of 240 kg*m^2 and turns with negligible friction about a vertical axle through its center. How much work did the child do on the merry-go-round
a projectile is fired up into the air at a speed of 185 ms at an angle of 42deg relative to the horizontal. determine
find the coefficient of kinetic friction between a 4.3- block and the horizontal surface on which it rests if an 80
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