Technology Centre

pH is a measure of the activity of hydrogen ions (H+) in a solution and, therefore, its acidity or alkalinity. Acidity of some common acids are indicated in the table below : Acid Normality pH Acetic N 2.4 Acetic 0.1 N 2.9 Acetic 0.01 N 3.4 Alum 0.1 N 3.2 Arsenious saturated 5.0 Benzoic 0.1 N 3.0 Boric 0.1 N 5.2 Carbonic saturated 3.8 Citric ...

A body immersed in a liquid Archimedes' principle states that: "If a solid body floats or is submerged in a liquid, the liquid excerts an upward thrust force on the body equal to the gravitational force on the liquid displaced by the body." It can be expressed as W = V γ   = V ρ g     (1) where : W = weight (N) V = volume of the body below the surface of the liquid (m3) γ   = specific weight (weight per unit volume) (N/m3) ρ...

An introduction to and a definition of the Cavitations Number The Cavitations Number or Cavitation Parameter is a "special edition" of the dimensionless Euler Number. The Euler Number An introduction to and a definition of the Euler Number The Cavitations Number is useful analyzing fluid flow dynamics problems where cavitations may occur. The Cavitations Number can be expressed as σ = (pr - pv) / (1/2 ρ v2)         (1) where : σ = Cavitations...

Cavitation may occur in fluid flow systems where the local static pressure is below the vapor pressure Cavitation is a common problem in pumps and control valves - Causing serious wear and tear and damage. Under the wrong conditions, cavitation Reduces the components life time dramatically. What is Cavitation? Cavitation may occur when the local static pressure in a fluid reach a level below the vapor pressure of the liquid at the actual temperature. According to the...

Decibel is a logarithmic unit used to describe the ratio of the signal level - power, sound pressure, voltage, intensity, etc. Most signal systems - as sound power or sound intensity, human speech, sonar, microwaves, radio signals and fiber optics - can be described by transmitting power transmission path loss receiver sensitivity Transmitting power, path loss and receiver sensitivity are absolute power values - Watts in the SI system. The Definition of Decibel Decibel...