Heat Transfer: Theory and Problems

Appendix B

PROPERTIES OF MATERIALS

SI BASE UNITS

The international system of units (SI) is based on the seven units given here.

 

Table B 1

Length	metre	m
Mass	kilogram	kg
Thermodynamic temperature	kelvin	K
Time	second	s
Luminous intensity	candela	cd
Amount of a substance	mole	mol
Electrical current	ampere	A

SI DEFINED UNITS

The following are the defined units with standard symbols.

 

Table B 2

Force	newton, N	1N=1 kg m/s2
Power	watt, W	1W=1 J/s
Pressure	pascal, Pa	1 Pa=1 N/m2
Temperature	kelvin, K	K = °C + 273.15
Work, heat, energy	joule, J	1 J=1N m
Potential difference	volt, V	1V=1 W/A
Electrical resistance	ohm, ς	1 ς = 1 V/A

SI DEFINED UNITS

Derived units are obtained from the governing equations ...