Happy Birthday Winnie-the-Pooh (1926)

Nomenclature Proficiency Average = 68.7%

A Few Sig. Fig. Notes USUALLY, numbers with decimal points are MEASURED numbers What does this mean for sig. figs.? 1 is USUALLY a DEFINED number Put large numbers into scientific notation BEFORE rounding.

Types of Units Distance (length) Mass/Weight Volume Time foot, inch, mile, yard, meter, centimeter, rod Mass/Weight gram, kilogram, ton, pound, ounce, stone Volume gallon, quart, pint, milliliter, liter, cubic centimeter (cm3, cc) Time second, minute, hour, year, microsecond, eon

Dimensional Analysis (unit conversion) 12 in = 12 in 1 ft _ 1 ft 1 ft _ = 1 = 12 in 12 in 12 in UNIT EQUATION 12 in 12 in = 1 ft 1 ft 12 in = = 1 1 ft 1 ft 1 ft Conversion between feet and inches can be written either: 1 ft _ 12 in OR 12 in 1 ft

Dimensional Analysis (unit conversion) The Goal: Convert one unit to another How: Use conversion factors Use them so that 1 ft _ 12 in OR 12 in 1 ft Unit you want to keep ____________________ Unit you want to cancel

Dimensional Analysis (unit conversion) How many feet are in 51.5 inches? 1 ft _ 12 in 1 ft = 12 in OR 12 in 1 ft

The Metric System ENERGY LENGTH VOLUME TIME MASS PRESSURE Built on BASE UNITS and PREFIXES Base Units: gram – g 2.35 g 1.673x10-24 g liter – L 3.78 L 4.3x103 L meter – m 100. m 5.29x10-11 m second – s 135 s 86400 s others 4.184 J 755 torr ENERGY LENGTH VOLUME TIME MASS PRESSURE

The Metric System -- Prefixes tera T 1x1012 Larger than base unit giga G 1x109 mega M 1x106 kilo k 1x103 BASE UNIT Listed on page 23 in the book deci d 1x10-1 Smaller than base unit centi c 1x10-2 milli m 1x10-3 micro m 1x10-6 nano n 1x10-9 pico p 1x10-12 femto f 1x10-15

The Metric System -- Prefixes tera T 1x1012 giga G 1x109 The metric system is defined as ONE prefix is equal to a POWER OF 10 of the base unit mega 1 Mike = M 1x106 kilo 1 g = k 1x103 BASE UNIT deci d 1x10-1 centi 1 m = c 1x10-2 milli m 1x10-3 micro 1 L = m 1x10-6 nano n 1x10-9 pico p 1x10-12 femto f 1x10-15