When most main sequence stars exhaust their hydrogen supply, they become giants. Yet on the diagram, there are not many stars between the main sequence and the giants. What would explain this fact?

Infrared radiation has wavelengths that are shorter than visible light is part of the visible light spectrum has wavelengths that are longer than visible light has the same wavelengths as ultraviolet radiation

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

Why does lightning travel from clouds to the ground?