A proton is located at <3 x 10^-10> m. What is r, the vector from the origin to the location of the proton

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

How is zig zagging a form of acceleration?

What is the momentum of 70 kg runner traveling at 10 m/s?