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Two 2.5cm -diameter disks spaced 2.0 mm apart form a parallel-plate capacitor. The electric field between the disks is 4.1×105 V/m.
A) What is the voltage across the capacitor? Which I found to be 820 V
B) How much charge is on each disk? (Answer in Coulombs)
C) An electron is launched from the negative plate. It strikes the positive plate at a speed of 2.4×107 m/s. What was the electron's speed as it left the negative plate? (Answer in m/s)
A spacecraft is traveling with a velocity of v0x = 4330 m/s along the +x direction. Two engines are turned on for a time of 728 s. One engine gives the spacecraft an acceleration in the +x direction of ax = 1.74 m/s2.
Before starting this problem, review COnceptual Example 3. Suppose that hail described there bounces off the roof of the car with a velcity of +15 m/s. calculate the force exerted by the hail of the roof
A 34.0-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 225 N. What is the final speed of the crate after being pulled these 21.0 m
Two uniform, solid disks are rotating freely about the same axis. Then they are linked together without the aid of any external influences. Before being connected.
A krypton laser produces a cylindrical red laser beam 2.0 in diam with 2.0 of power. What is the light intensity on a wall 2.5 away from laser.
A spring stretches 4.1 cm when a 11 g mass is hung from it. If a total mass of 25 g attached to this spring oscillates in simple harmonic motion,how to calculate the period of motion.
An air conditioner connected to a 139 V rms ac line is equivalent to a 11 capital omega resistance and a 2 capital omega inductive reactance in series. What is the impedence of the air conditioner
A wooden block weighing 7 N is at rest on top of a wooden desk. The coefficient of static friction between the block, Find the minimum horizontal force required to move the block
A cube of ice is taken from the freezer at -8.4 and placed in a 104 aluminium calorimeter filled with 322 of water at room temperature of 20. The final situation is observed to be all water at 17.
To determine the specific heat of an object, a student heats it to 100 in boiling water. She then places the 68.5 object in a 196 aluminum calorimeter containing 135 of water. The aluminum and water are initially at a temperature of 19.5, and are ..
A gymnast with mass m1 = 42 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 106 kg and length L = 5 m. Each support is 1/3 of the way from each end. at first the gymnast stands at the left end of..
The coefficient of kinetic friction is 0.350. Illustrate what should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?
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