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An electron is released a short distance above the surface of the Earth. A second electron directly below it exerts an electrostatis force on the first electron just great enough to cancel the gravitational force on it. How far below the first electron is the second?
A movable piston having a mass of 7kg and a cross-sectional area of 6 cm2 traps 0.2 mol of an ideal gas in a vertical cylinder. The piston slides without friction in the cylinder. The outside of the cylinder is kept at atmospheric pressure, 1.013×..
A 35-kg child rides a playground merry-go-round, standing 1.6 m from its center. What was the distance travelled by the child during this time
two 5 gram spheres are each suspended from a pin by a 40 cm long non-conducting thread. if the spheres are separated
The image of a very distant car is located 18 cm behind a convex mirror. What is the radius of curvature of the mirror
question a 2.0 kg projectile if fired with initial velocity components vox 30 ms and voy 40 ms from a point on the
If the potential difference between a cloud and the ground is about 17MV, how much charge is transferred in a lightning bolt that releases 1.3GJ of energy
what is the electric potential energy of this particle. what is its speed just before it strikes the positive plate.
A boy drops a stone vertically down from the margin of a 24-m cliff. After how many seconds will the two stones pass each other
A speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. What is the speed at which the belt of the ramp is moving
How far below the release point is the center of mass of two stones at t = 550 ms? (Neither stone has yet reached the ground.)
What is the total force on the bottom of a swimming pool (20m by 10m), if the pool has an average depth of 1.50 m
A certain camera has f-numbers that range from 1.1 to 28. If the focal length of the lens is 40 mm, what is the range of aperture diameters for the camera
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