When a star's nuclear energy runs out, it dies. a star can die in many ways. a is one way a star might die, and it can trigger the beginning of a new star's life cycle.

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?