2. when a gfci senses a fault, the ground-fault current can originate from
a. either the hot or the neutral wire on the load side of the gfci.
b. either the hot or the neutral wire on the line side of the gfci.
c. only the hot wire on the line side of the gfci.
d. only the hot wire on the load side of the gfci.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Determine whether or not it is possible to compress air adiabatically from k to 140 kpa and 400 k. what is the entropy change during this process?

Water in a partially filled large tank is to be supplied to the roof top, which is 8 m above the water level in the tank, through a 2.2-cm-internal-diameter pipe by maintaining a constant air pressure of 300 kpa (gage) in the tank. if the head loss in the piping is 2 m of water, determine the discharge rate of the supply of water to the roof top in liters per second.