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A parallel-plate vacuum capacitor has 8.56J of energy stored in it. The separation between the plates is 3.80mm. If the separation is decreased to 1.45mm,
Part A:
what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed?
Part B:
What is the energy now stored if the capacitor remained connected to the potential source while the separation of the plates was changed?
Mars has a mass of 6.4*10^23 kg and radius of 3,400,000 m. find the acceleration due to the gravity on Mars
A thin rod consists of two parts joined together. One-fourth of it is silver and three-fourths is gold. The temperature decreases by 21 C°.
A point charge +6.7 uC is placed at the origin, and a second charge -3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane so that the net force acting on it is zero? Express your answers usi..
If the range of the projectile is 2.39 m, the time-of-flight is T = 0.919 s, and air resistance is turned off, determine the following. What is the launch angle of the projectile
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A 14.2-g piece of Styrofoam carries a net charge of -0.69 µC and is suspended in equilibrium above the center of a large, horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per unit area on the plastic..
At one instant, a system has 30J of kinetic energy and 30J of potential energy. How much work was done by conservative forces
Two kids sit on a 3.0 meter long seesaw. Kid 1 is 50.0kg and kid 2 is 40.0kg. how far from the pivot on the right side should kid 1 sit to balance the seesaw
The block is acted upon by its weight w=200lb, a horizontal force Q=600 lb and pressure P exerted by the inclined plane. The resultant R of these forces is up and parallel to the incline there by sliding the block up it. Establish P and R.
An object of height 5 cm is placed 30 cm in front of spherical concave mirror. If the image is real and 10 cm high, what is the radius of curvature of the mirror
A 1000 car pushes a 2000 truck that has a dead battery. What is the magnitude of the force of the truck on the car
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