Two rectangular sedimentation basins, each 15 m feet long, 4 m wide and 3 m deep, settle 4200 m3 /d in a primary system. The effluent weir length is 18 m. Calculate (a) the detention time, (b) the overflow rate, (c) the critical settling velocity, and (d) the flow rate over the effluent weir

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Ifa component is made of two or more materials with different modulus of elasticity (e), it is called a composite member and we calculate the factor·n". mention the formula for calculating n". also, ifn> 1, explain what will happen to the 1. transformed.gi) ifn 1, what will happen to the material when transformed material when

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