Saturn appears to emit heat as infrared radiation in excess of the energy absorbed from sunlight and also the kelvin-helmholtz contraction. the most likely major cause of this excess heating is

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.