Systeme International base units (SI Units) LengthMeterm Massgramg VolumeLiterL TimeSeconds TemperatureKelvinK HeatJouleJ

WrittenSymbolExponentialDecimal giga mega GMGM kilok Base unit decid centic millim micro Nano µNµN

Heat - measure of the quantity or how much energy Temperature - measure of the intensity or how energetic each particle is

Temperature Conversion K = °C °C = 5/9 (°F – 32) °F = 9/5 * °C + 32

Density - The amount of mass per unit volume Density = Mass D = M Volume V

Specific Gravity Numerically the same as density but has no units. It is still a mass/volume It is a comparision to water as the standard that has a density of 1.00 g/mL at 20 ºC If Lead has a density at 20 ºC of g/mL It is times more dense than water So the specific gravity for Lead is reported as 11.35

calorie The amount of heat needed to raise the temperature of one gram of liquid water by 1 ºC

1 kcal = 1000 cal 1cal = J 1000 cal = 1 C (food calories)

Specific heat The amount of heat (in calories) necessary to raise the temperature of 1 g of any substance by 1 ºC.

Amount of heat = Specific heat x mass x change in temp Heat = SH x m x (T 2 – T 1 )