Electric current is a stream of electrons in motion, so they have to gain an energy from outside. There are two possibilities: one of them is the photoeletric phenomenom which is based on striking electrons from their orbits with the photon's energy. Second options is the substraction od eletric potentials on the edges od material.
Imagine that the two atoms are playing tug of war with the electron, but one is pulling with a stronger force than the other. This inequality results in the majority of the rope being pulled toward the stronger atom. In the bond, the electron is pulled closer to the stronger atom too. This results in each side having a partial charge, one being more negative than the other.
Answer:
Explanation:
First off, this lens is concave. Second, the image is obviously smaller, and third, the only thing that is NOT obvious, is the fact that real images are always upside down and virtual images are always right-side-up. So the choice you're looking for is D.
Answer:
B
Explanation:
When air is heated, it expands and rises.
