Which best describes the difference between speed and velocity?
a) velocity is instantaneous.
b) speed is a vector quantity.
c) speed includes rate of change and direction.
d) velocity includes rate of change and direction.

What is created when solids,liquids,an gases mix with one another

Akg a of 55 m at an of 11 ? . if is at 98 km/h,be ?

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.