Darcy-Weibach Equation Qn 1. The head loss in a section of PVC pipe is 0.8 m, the friction coefficient, f, = 0.012,
the length is 15 m and the flow rate is 0.028 m/s. Using Darcy-Weisbach equation,
find the pipe diameter in metres. (0.108 m)

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.

Asign is hung between two cables as illustrated below. if the sign weighs 350 n, what is the tension (in n) in each cable?