“You Need to Learn About . . .”

Control Valve – What You Need to Learn

ii) The control valve Manufacturer can only state the Inherent valve characteristics, which refer to the flowrate (F) – valve travel position (m or Z) relationship, when the pressure drop across the control valve (DPV) is constant. Note that the pressure drop across the control valve (DPV) can be almost constant only if the piping system pressure drop (DPS) is concentrated at the control valve ...

What you need to know about ... concussion.

Everything You Need to Know About Mechanisms

A) The Correct Use of Arrows to Indicate Electron Movement The ability to write an organic reaction mechanism properly is key to success in organic chemistry classes. Organic chemists use a technique called arrow pushing to depict the flow or movement of electrons during chemical reactions. Arrow pushing helps chemists keep track of the way in which electrons and their associated atoms redistri...

What you need to know about ... pneumonia.

What You Need to Know About

Although many people blame imperfect willpower for their imperfect choices, it’s clear they haven’t given up hope. A majority of respondents believe that willpower is something that can be learned. Willpower: An Introduction Many people believe they could improve their lives if only they had more of that elusive quality known as willpower. With more self-control, we would all eat right, exercis...