Find the electric field at a height z directly above ( 0) the center of a square sheet with sides of length l and a uniform surface charge σ. check your result for the limiting cases l + x and z l. hint: when i say "check your result", i mean that your answer should reduce to something more familiar in those two cases. when l → oo it should look like the electric field for an infinite charged sheet. when z l it should look (approximately) like the electric field due to a point charge q = l2ơ

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 !