Machines require Less __ over a longer __ and change the __ of the force. FILL IN THE BLANKS.
this science

Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .

What is the effect of returning nuclear reactor cooling water back into bodies of water?