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The dielectric in a capacitor serves two purposes. It increases the capacitance, compared to an otherwise identical capacitor with an air gap, and it increases the maximum potential difference the capacitor can support. If the electric field in a material is sufficiently strong, the material will suddenly become able to conduct, creating a spark. The critical field strength, at which breakdown occurs, is 3.0 MV/m for air, but 60 MV/m for Teflon.
A parallel-plate capacitor consists of two square plates 13cm on a side, spaced 0.60mm apart with only air between them. What is the maximum energy that can be stored by the capacitor?
What is the maximum energy that can be stored if the plates are separated by a 0.60-mm-thick Teflon sheet?
Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. What is the voltage between the plates
Water enters a horizontal pipe with a velocity of 3.0 m/s and exits with a velocity of 6.0 m/s. If the gauge pressure at the entrance is 55 kPa, what is the gauge pressure at the exit? Density of water is 1000 kg/m3.
The "Giant Swing" at a county fair consists of a vertical central shaft with a number of horizontal arms attached at its upper end. (See the figure below (Figure 1) ) Each arm supports a seat suspended from a 5.00m -long cable, the upper end of wh..
In compressing the spring in a toy dart gun, 0.4 J of work is done. What is the dart's kinetic energy as it leaves the gun
What is the net charge inside the sphere.
The picture tube in an old black-and-white television utilizes magnetic deflection coils rather than electric deflection plates. Presume an electron beam is accelerated during a 52.8-kV potential difference and then through a region of uniform magnet..
Ball bearings are made by letting spherical drops of molten metal fall inside a talll tower-called a shot tower- and solidify as they fall. What is the bearing's impact velocity
A block of mass 2.89 kg is pushed 2.20 m along a frictionless horizontal table by a constant 13.0 N force directed 23.0° below the horizontal. calculate the normal force exerted by the table
question1a long solenoid with 70 turns of wire per centimeter carries a current of 0.16. the wire that makes up
A small spherical mass of 8.25 × 10-2 kg and charge of q2 = - 0.40 µC hangs from a thread. What is the tension in the thread
An unstable particle at rest breaks up into two fragments of unequal mass. The mass of the lighter fragment is equal to 2.80 multiply.gif 10-28 kg, determine the speed of the heavier fragment
Describe how Newton's three laws of motion involved in the process of lifting a weight using the high pulley. Consider, too, what would happen if the floor and seat where completely smooth. Is this a process in which momentum and energy are conserved..
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