Aluminum foil has a shiny side and a dull side. many experts believe that the shiny side of the aluminum foil should face the food when you are using it to cover the food. what process would explain the reason why the shiny side should face the food?
a) conduction.
b) convection.
c) insulation.
d) radiation.

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