The magnitude of the concentrated load is equal to the total load or the area under the curve. f = 18.0 kn the line of action of the concentrated load passes through the centroid of the area under the curve. x- = 63 kn m/18 kn x- = 3.5 m .

Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa