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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?
In a crash test, a test car of mass 1711 kg is moving at a speed of 37.2 m/s when it crashes into a wall. how much average power (in W) is expended in this process
Automobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of acceleration is less than 250m/s2.
A submarine dives to a depth of 266 feet in the ocean. What is the force (in pounds) acting on a hatch that has an area of 3 square feet?
A man with a mass of 62 kilogram skis down a frictionless hill that is h = 2.2 meter high. Find at what horizontal distance from the edge of the ledge does the man land
A town is planning on using the water flowing through a river at a rate of 5.0 x 106 kg/s to carry away heat from a new power plant, What is the maximum power this plant can produce
A small 11.0 g- bug stands at one end of a thin uniform bar that is initially at rest on a smooth horizontal table. What is the angular speed of the bar just after the frisky insect leaps
An electron with a speed of 2.1 x 106 m/s collides with a hydrogen atom, exciting the atom to the highest possible energy level. What is the wavelength of the photon emitted in the quantum jump
A cycle wheel with a mass of 2.5 kilogram and a radius of 33 centimeter rolls across a horizontal floor with a translational speed of 1.5 m/s. Obtain how far up the ramp will it go before stopping
An LC circuit consists of a capacitor, C = 4.08 µF, and an inductor, L = 4.92 mH. The capacitor is fully charged using a battery and then connected to the inductor. An oscilloscope is used to measure the frequency of the oscillations in the circui..
a an egg is thrown nearly vertically upward from a point near the cornice of a tall building. it just misses the
A 2.25 mol sample of an ideal monatomic gas undergoes the reversible process, What is the change in the internal energy of the gas
Work of 2 Joules is done in stretching a spring from its natural length to 17 cm beyond its natural length. What is the force (in Newton's) that holds the spring stretched
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