Aball of gas becomes a when nuclear fusion begins in its core. a. nebula b. white dwarf c. star d. protostar

In physics the desire of an object to keep doing what it is doing is termed?

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

Who was the first scientist to measure speed as distance over time?