Avoltmeter is used to determine the voltage across a parallel plate capacitor; the positive plate has a 400 kv higher electric potential than the negative plate.
1) in ev, how much will the potential energy of a proton change by moving it from near the negative plate to near the posivite plate?
2) in ev, how much will the potential energy of an electron change by moving it from near the negative plate to near the positive plate?

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?