Why is a train more difficult to stop then a rolling ball even if they are traveling at the same speed? urgent

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

What is the equation for electrical work?

The fine detail of saturn's rings provides evidence that the planet may be: a. young b. millions of years old c. in a state of growing larger