The electric field must be zero inside a conductor in electrostatic equilibrium, but not inside an insulator. it turns out thatwe can still apply gauss’s law to a_ gaussian su_rface that is entirely within an insulator by replacing the right-hand side ofgauss’s law, q5160, with qinie, when: 5 is the permittivity of the material- (technically, 60 is called the vacuumpermittivity.) suppose a long, straight wire with linear charge density 250 nc/ m is covered with insulation whosepermittivity is 2,550,. what is the electric field strength at a point inside the insulation that is 15 mm from the axis of thewire?

What type of nuclear decay causes the atomic number of an element to increase by 1?

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.