17.) a microwave is rated at 750 watts. how long will it take the microwave to do 5700 j of work on a cup of water? assume 100% efficiency.

To answer the question above, we make use of the equation,
                                Work = Power x time
From the equation, time may be solved through
                                   time = Work / Power
Substituting the known values from the given,
                                     time = (5700 J) / (750 J/s)
                                             = 7.6 s

Letter a, because when there are unlike charges they will always attract to each other.