What is the acceleration of a freely falling object 2 seconds after it has been released from a height of 100 m?

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 !

If you put a helium-filled balloon in the refrigerator, what will happen?

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this