Unit Conversions Base Units SI Base Unit defined

Unit Conversions

Base Units – (SI) � Base Unit – defined unit that is based on object or event in physical world. SI Base Units Quantity Base Unit Time Seconds (s) Length Meter (m) Mass Kilogram (kg) Temperature Kelvin (K) Amt of Substance Mole (mol) Electric Current Ampere (A)

SI Prefix Conversions move right move left Prefix mega- Symbol M Factor 106 kilo- k 103 BASE UNIT --- 100 deci- d 10 -1 centi- c 10 -2 milli- m 10 -3 micro- 10 -6 nano- n 10 -9 pico- p 10 -12

SI Prefix Conversions 1) 20 cm = 0. 2 _______ m 2) 0. 032 L = _______ m. L 32 3) 45 m = 45, 000 nm _______ 4) 805 dm = _______ 0. 0805 km

Length American standard Metric standard 1 mile = 1760 yards = (5280 feet) 1 yard = 3 feet 1 foot = 12 inches 1 mil = 1/1, 000 inch 1 kilometer = 1000 meters 1 meter = 10 decimeters 1 decimeter = 10 centimeters ( 1 meter = 100 centimeters) 1 centimeter = 10 millimeters Conversion: 1 inch is defined to be exactly 2. 54 cm in July, 1959. (before this, the UK inch measures 2. 53998 cm, while the US inch was 2. 540005 cm)

Weight American Standard Metric Standard 1 ton = 2000 pounds 1 pound = 16 ounces 1 (metric) tonne = 1000 kilograms 1 kilogram = 1000 grams 1 gram = 1000 milligrams Conversion: 1 pound = 0. 453 592 37 kilograms hence 1 kilogram 2. 2 pounds

Volume for liquid American Standard Metric Standard 1 gallon = 4 quarts 1 quart = 2 pints 1 pint = 16 fluid ounces 1 liter = 1000 milliliters 1 milliliter = 1 c. c. (also 1 pint = 2 cups 1 cup = 16 Tablespoons 1 TBS = 3 teaspoons ) Conversion: 1 gallon = 3. 785 411 784 liters 3. 8 liters 1 gallon = 231 cubic inches

Temperature American standard Metric Standard Fahrenheit 32 ºF = freezing 212 ºF = boiling Celsius 0 ºC = freezing 100 ºC = boiling (for pure water) Conversion: F = 1. 8 × C + 32 C = (F – 32)/1. 8

Conversion Example � Convert 15 minutes into seconds 15 minutes 60 seconds 1 minute = 900 seconds

Conversion Example � Convert 5 feet into meters 12 inches 2. 54 cm 1 foot 1 inch 100 cm =1. 524 m = 152. 4 m 100