Ramkumar666:

No one can tell you what the symbology you list represents. These symbols can mean a lot of different things - it all depends on what specific equation you refer to and the identified symbols related to it. No one in his right mind should use an equation or mathematical relationship without a complete, detailed identification of all the math symbols employed in said equation, as well as a full identification of all the units that should be employed in the same equation as they relate to any numerical constants employed. To do so indicates that one doesn't know what one is doing.

Just to give you some examples of how wrong you can be, consider that the symbol "K" can mean the ratio of specific heats as well as a means to identify a resistance coefficient in pipe fittings - or perhaps it stands for the absolute temperature in degrees Kelvin? The symbol "g" can mean a gauge reading for pressure, etc., etc. ....................etc.

I recommend you stop thinking and using general terms and start dealing with specific information and identifications. Otherwise you open yourself up for generating errors and mistakes in engineering. I offer this advice after over half a century in the business of engineering.