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A charge Q is placed on parallel-plate capacitors of area L X L and plate seperation d. The capacitor is then filled with a dielectric of dielectric constant k. If L = 0.22m, d = 1.8mm, Q= 0.3x10^-9 C, and k= 3.5, what is the surface charge induced on the dielectric? What is the magnitude of the the electric field in the dielectric? How much energy is stored in this capacitor.
Two closely spaced circular disks form a parallel-plate capacitor. what are the diameters of the disks
An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 750 m, horizontal distance 19.8 km, What is the distance between the two aircraft
Two charged spheres are 15 cm apart. They are moved, and the force on each of them is found to have been quadrupled. How far apart are they now.
A 1300 kg car and 4940 kg truck undergo a perfectly inelastic collision. Before the collision, the car was traveling southward at 1.35 m/s, and the truck westward at 9.40 m/s. Find the velocity of the wreckage immediately after the collision. (Enter ..
A rock is thrown from the roof of a building with a velocity v(0) at an angle alpha(0) of from the horizontal. Calculate the magnitude of the velocity of the rock just before it strikes the ground
What is the magnitude of the electric force of attraction between an iron nucleus (q=+26e) and its innermost electron if the distance between them is 1.5 x 10^-12m
What is the initial (horizontal) velocity of the ball.
Suppose that earth was formed as molten rock at some very high temperatures. Estimate the time for the earth to cool to 300 K.
A crate of eggs is located in the middle of the flat bed of a pickup truck as the truck negotiates a curve in the flat road. how fast can the truck be moving without the crate sliding
Clarice is standing at the edge of a steep cliff when a boulder comes loose from the edge and falls directly downward toward the lake below. Clarice hears the sound of the boulder hitting the water 7.5 s later. If the speed of sound is 340 m/s, how h..
A 25.0g arrow is shot through a 7.8 cm apple. If the arrow enters the apple at 38.8 m/s and emerges with a speed of 30.10m/s in the same direction, what is the magnitude of force with which the apple has resisted the arrow.
A thermos contains 165 cm3 of coffee at 85° C. To cool the coffee, you drop two 14-g ice cubes into the thermos. The ice cubes are at first at 0° C and melt completely. What is the final temperature of coffee? Treat the coffee as if it were water.
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