Ablue puck has a velocity of 3i –4j m/s. its mass is 20 kg. what is its momentum?

Magnitude:

√(3² + 4²) = √(9 + 16) = √25  =  5

Momentum = (mass) x (velocity)  =  (20kg x 5m/s) =  100 kg-m/s

Direction:

3i - 4j is in the direction  tan⁻¹(-4/3)  =  53.1 south of east.

A. to determine if humans can explore mars safely

Honestly "global warming" may be a slight possiblity, however they called it "climate change" because its not real, in fact we had one of our coldest days here not too long ago, and the "issues" with this subject is a blindfold for actual problems.