Environmental science question ! many things happen when rain falls down explain what happens to rain as it falls on the surface of concrete water and a slanted/sloped roof now think about an extra long rainy season what do you think would happen to the bodies of water (streams creeks rivers etc) during the rainy season

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?