A white dwarf is not continuing in nuclear fusion, yet it still shines brightly for thousands of years because... o The star is still super hot.

o It reflects light from other sources.

o both of these options

o neither of these options

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?

How many electrons does each element require in its valence shell to become stable?