If you have a mechanical advantage of 2 with a block and tackle system.  How much force do you have to pull with? Half
Twice
one quarter
Three times

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.