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At a distance of 1.41 m from a point charge of +2.74 ?C, there is an equipotneial surface. At greater distances there are additional equipotential surfaces. The potential difference between any two successive surfaces is 2.98 x 103 V. Starting at a distance of 1.41 m and moving radially outward, how many of the additional equipotential surfaces are crossed by the time the electric field has shrunk to one-half of its initial value? Do not include the starting surface.
Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.3 km x 0.3 km, What is the mass of the mud sitting above a 4 m2 area of the valley floor
A 79kg person holds out his arms so that his hands are 1.6m apart. Normally, a person's hand makes up about 1% of his or her body weight. For round numbers, we shall assume that all the weight of each hand is due to the calcium in the bones.
what is the magnetic field between the rails. A lead ball is dropped into a lake from a diving board 6 above the water. After entering the water, it sinks to bottom with a constant velocity equal to the velocity with which it hit the water. The bal..
A 0.04 kg bullet collides in elastically with a 0.5 kg ballistic pendulum. Before the collision the pendulum was at rest but immediately after collision the pendulum is moving with speed of 13.6 m/s. How fast was the bullet travelling before the coll..
A wheel 55-cm in diameter accelerates uniformly from 240 rpm to 395 rpm in 5.0 s. How far will a point on the edge of the wheel have travelled in this time.
The difference in electric potential between a thunder cloud and the ground is 1.58 108 V, Determine the change in electric potential energy of one of the electrons that move to the cloud
A 253 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal.
The skater farthest out has a mass of 58.0 kg and is 7.80 m from the pivot. He is skating at a speed of 6.40 m/s. Find out the magnitude of the centripetal force that acts on him.
An electric field is set up between two parallel plates, each of area 2.2 m2, by putting 1.0 C charge on one plate and the -1.0 C charge on the other. The plates are separated by 4.0 mm. What is the magnitude of the electric field between the plates ..
A car driving directly north on the freeway at a speed of 110 km/h and a truck is leaving the freeway driving 85 km/h in a direction 35 west of north
A 2.78-kg steel ball strikes a massive wall at 10.0 m/s at an angle of ? = 60.0° with the plane of the wall, what is the average force exerted by the wall on the ball
Explain how much work is used to raise A to height h? What happens to the kinetic energy of B if its speed is doubled?
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