1-a train travels 100 km to reach town a in one hour and 15 min. the train stops at station a for 45 minutes. then it travels 150 km to station b in 2 hours. what is the average velocity of the train?
average velocity= displacement/time

2-a car accelerates uniformly at the rate of 1.2 meters per second squared for a distance of 75 meters. if the truck started with a initial velocity of 6 meters per second, what is its velocity at the end of the 75 meters?
vf^2=vi^2 + 2as

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 !