The flux coming through the surface of a star with a temperature of 10,000K is how much more than the flux coming through the surface of a star with a temperature of 5000k

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

Anybody wanna ? (picture included? )