Explain the difference between a theory and a law.

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.

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above

The sum of the normal stresses does not change as the stress state rotates through an angle. a)-trune b)- false