Atruck runs into a pile of sand, moving 0.80 m as it slows to a stop. the magnitude of the work that the sand does on the truck is 6.0 times 10^5 j. (a) determine the average force that the sand exerts on the truck. (b) did the sand do positive or negative work? (c) how does the average force change if the stopping distance is doubled? indicate any assumptions you made.

Asher cycles 12 miles in 16 hours. what is his speed?

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 !

What is the rate of 12 liters of water moving through a water hose in 4.0 minutes?