Kenapa anjing muntah berwarna hijau

Aball horizontally thrown from a cliff at 8m/s

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.