Dew Point definition (explain in your own words plsss)

For which pair of objects would adding the same a

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

If the textbook weighs 19.6 newtons on venus,what is the strength of gravity on venus?