Knowing that the tension in clable ad is 405n, determine: (a)
the angle between cable ad and the boom ab, (b) the projection on
ab of the force exrted by cable ac at point a.

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.