The total units by an objects as it changes position is called ?

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.

Discuss how the hardness or softness of the landing surface is related to the time required to stop the egg

Name two kinds of practical electric pumps.