When an object with a negative charge is moved from point A to point B through an external electrical field, it gains electrical potential energy. When an object with positive charge is moved from point A to point B though the same field, it loses electrical potential energy. Which of the following statements is true? Select all that apply.

A:Because the positive and negative charges cancel out, the potential difference between A and B is zero (that is, VB = VA).

B:The positively charged object moves through a negative potential difference between A and B (that is, VB - VA < 0).

C:The negatively charged object moves through a negative potential difference between A and B (that is, VB - VA < 0).

D: The negatively charged object moves through a positive potential difference between A and B (that is, VB - VA > 0).

E:The positively charged object moves through a positive potential difference from A and B (that is, VB - VA > 0).

-An explanation would be appreciated, thank you!

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

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.

Asap i'm in class rn a 1,000-kg car is traveling 20 m/s on a flat stretch of road. it gets to a hill and coasts uphill until it stops. how high up the hill does the car travel? givens: equation: 1/2mv2initial=mghfinal solve for h. plug & chug, label.