Thermodynamics

Thermodynamics States About Energy Conversion Thermodynamics is the branch of science that embodies the principles of energy transformation in macroscopic systems. The general restrictions which experience has shown to apply to all such transformations are known as the laws of thermodynamics. These laws are primitive; they cannot be derived from anything more basic. The first law of thermodynamics states that energy is conserved; that, although it can be altered in form and transferred from one place to another, the total quantity remains constant. Thus, the first law of thermodynamics depends on the concept of energy; but, conversely, energy is an essential thermodynamic function because it allows the first law to be formulated. This coupling is characteristic of the primitive concepts of thermodynamics. The words system and surroundings are similarly coupled. A system is taken to be any object, any quantity of matter, any region, and so on, selected for study and set apart (men...

Unit System and SI Unit

The principle unit system of this book is the SI (System International of Units), but to accommodate another systems, practically all numbered equations are written so that they can be used with any consistent set of units.

For SI is important for engineering work, SI and English engineering units are probably the most important. Consequently the coefficient of the 25 dimensionally inconsistent equation which can’t be used directly which any unit system are given first for SI, then by footnote or other means for English engineering unit.

Basic SI Units:
Force = Newton, N
Length = meter, m
Mass = kilogram, kg
Mole = kilogram mole, kmol
Temperature = Kelvin = K
Time = second, s
Pressure = Newton/meter2, N/m2 = pascal, Pa
Energy = Newton-meter/second, N.m/s = watt., W
Frequency = 1/second, s-1 = hertz, Hz.

Prefixes for SI Units:
1,000,000 = 106 = mega = M
1,000 = 103 = kilo = k
100 = 102 = hecto = h
10 = 10 = deka = da
0.1 = 10-1 = deci = d
0.01 = 10-2 = centi = c
0.001 = 10-3 = milli = m
0.000001 = 10-6 = micro = ยต
0.000000001 = 10-9 = nano = n

Want to know to write supperscript look on html for mathematic.