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Published byTerrell Drover Modified over 2 years ago

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Do now: read chapter 1.6

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UNITS MATTER!!

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Part 1 - number Part 2 - scale (unit) Examples: 20 grams 6.63 x 10 -34 seconds A Measurement is a quantitative observation consisting of TWO parts

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5 T K = T C + 273.15 T C = T K – 273.15

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Celsius scale based on freezing and boiling points of water (0 o C – 100 o C) Kelvin scale based on absolute zero (0 K) temperature at which particles are at lowest possible energy NO negative numbers

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K = o C + 273 o C = K – 273

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T C = (T F – 32)X 5/9 T F = T C x 9/5 + 32 You don’t need to memorize the conversion between T C and T F

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1 T(base) = 1 000 000 000 000(base) = 10 12 (base) 1 G(base) = 1 000 000 000 (base) = 10 9 (base) 1 M(base) = 1 000 000 (base) = 10 6 (base) 1 k(base) = 1 000 (base) = 10 3 (base) 1 h(base) = 100 (base) = 10 2 (base) 1 da(base) = 10 1 (base) 1 (base) = 1 (base) 1 d(base) = 10 -1 (base) 1 c(base) = 10 -2 (base) 1 m (base) = 10 -3 (base) 1 µ(base) = 1 000 000 (base) = 10 -6 (base) 1 n(base) = 1 000 000 000 (base) = 10 -9 (base) 1 p(base) = 1 000 000 000 000(base) = 10 -12 (base) The Great Man King Henry Died By Drinking Chocolate Milk Monday Night Partying Tera- Giga- Mega- Kilo- Hecto- Deka- Base Deci- Centi- Milli- Micro- Nano- Pico-

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mega-M10 6 deci-d10 -1 centi-c10 -2 milli-m10 -3 PrefixSymbolFactor micro- 10 -6 nano-n10 -9 kilo-k10 3 BASE UNIT---10 0 giga-G10 9 deka-da10 1 hecto-h10 2 tera-T10 12 Decimal move left Decimal move right pico-p10 -12

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gmL 10 -1 10 -2 10 -3 10 1 10 2 10 3 Baseunit decicentimillidekahectokilo gmL Conversions between prefixes are merely a matter of moving a decimal point. The “base unit” means the you have a quantity (grams, meters, Liters, etc without a prefix.

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gmL 10 -1 10 -2 10 -3 10 1 10 2 10 3 Baseunit decicentimillidekahectokilo Example #1: Convert 18 liters to milliliters 18 L 123 18 liters = 18 000 milliliters

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gmL 10 -1 10 -2 10 -3 10 1 10 2 10 3 Baseunit decicentimillidekahectokilo Example #2: Convert 450 milligrams to grams 123 450 mg 450 mg = 0.450 g

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gmL 10 -1 10 -2 10 -3 10 1 10 2 10 3 Baseunit decicentimillidekahectokilo Example #3: Convert 20 kilograms to milligrams 20 kg 1 23 456 20 kg = 20 000 000 mg

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Volume= (length) 3 SI unit of V: m 3 Commonly used units of V: Liter(L)= dm 3 Milliliter(ml)=cm 3

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a. cm to m b. m 3 to L c. ns to s d. kg to g

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1) 20 cm = ______________ m 2) 0.032 L = ______________ mL 3) 45 m = ______________ m

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Handout Due next class.

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