### Pipes in Series or Compound Pipes

How do pipes work in series as taught to mechanical engineers in fluid mechanics? What is the difference between pipes in parallel and pipes in series?

Figure below shows a system of pipes in series:

The difference of water level in the two tanks A and B is given by

If a compound pipe is to be replaced by a pipe of uniform diameter (known as equivalent pipe),then the loss of head and discharge of both the pipes should be same. The uniform diameter (d) of the equivalent pipe may be obtained from the following relation:

where
l = Length of the equivalent pipe = l1 + l2 + l3

Read more about pipes in parallel to learn the difference between both these techniques.

### Are Engineers Favourite Among Girls?

What do girls think about men who are engineers and what type of engineers are most favourite among girls? A survey was conducted by a team of aboutmech with members chosen from different countries. Each team member carried out a neutral survey in his/ her country to evaluate what females think about most of the engineers from different engineering branches. An overview of different questions asked in survey is given below: Question: Which male engineers do you find more attractive as a husband? Almost 50% women voted for mechanical engineers to be the most attractive husbands among other engineers. So mechanical engineers are most favourite among girls as a husband. They find them more trustworthy, intelligent, and creative. A married women from California said, “If your husband is a mechanical engineer, he will help you in everyday tasks. Because mechanical engineers are good team players and they have creative ideas about everything.” Which male engineers do you find more