Notes - Section 1.4-1.6

Notes - Section 1.4-1.6 - Paul Jackman September 8 2009...

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Paul Jackman September 8, 2009 Chemistry CHE 106 – M029 Section 1.4-1.6 Notes 1.4 Units of Measurement Quantitative- associated with numbers SI Units SI units- (French: Systeme International d’Unites) metric units used in scientific measurements Prefixes are used to indicate decimal fractions or multiples of various units Length and Mass The SI base unit of length is the meter Mass is a measure of the amount of material in an object (SI base unit is kilogram) (equal to 2.2lbs) Temperature Temperature is the measure of the hotness or coldness of an object (temp. is property that determines the direction of heat flow: always flows from higher temp. to lower) Celsius (0 C is freezing point of water and 100 C is boiling point) and Kelvin scales used (based on the properties of gases 0 is the lowest attainable temp. (absolute zero) K= C + 273.15) Fahrenheit scale (C=5/9(F-32) F=9/5(C) + 32 Derived SI Units SI base units used to derive the units of other quantities (i.e. speed m/s)
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Notes - Section 1.4-1.6 - Paul Jackman September 8 2009...

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