Sound travels at a rate of 340 m/s in all directions through air. matt rings a very loud bell at one location, and steve hears it some time later at his location 450 meters to the south. how long did it take the sound to travel from the bell to steve's location?

Distance= speed x time
450=340xt
t=450/340
t=1.32s

(450 meters) x (second / 340 meters) = 1.324 seconds (rounded)

This is kenetic energy.

W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j