Bohr believed that light is emitted by an electron when
a. the electron completes a revolution in its orbit.
b. the electron's energy changes.
c. the electron's fixed orbit shifts.
d. the electron changes direction in its orbit.

small = small current large mag large current

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me

answer a fan shaped mass of sediment deposited at the base of a mountain front do to an abrupt change in stream gradient;