Alight year is
a. the distance that light travels in one-day
b. the amount of time it takes light to get to the nearest star
c. the distance light travels in a year

Which statement best explains why an object weight less on mercury than it does on earth

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

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 !