What is the basis for dividing the atmosphere into layers

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 !

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?