Why is the gravitational slingshot important to space exploration?
o to allow spacecraft to refuel without stopping
to spacecraft increase velocity without using additional fuel
o to make spacecraft weightless
o to make spacecraft safer

c. heat from the poles back down towards the equator.

a ratio derived from the equality between two different units that can be used to convert from one unit to the other. information obtained from experiments, sometimes called experimental results. the part of the experiment that is affected by the independent variable.