View
1.530
Download
4
Category
Tags:
Preview:
DESCRIPTION
An intro to our metric unit, asking "Why Metric?" The point is that prior systems varied widely from each other and internally, and were based on changing objects like body parts. Metric is based on the Earth (originally), which does not change.
Citation preview
Why Metric?
Commodity Number of Pounds
Wool 14, 15, 24
Wax 12
Sugar and spice 8
Beef and Mutton 8
Stone as measure of weight
How many inches in a mile?
Length
• 12 lines = 1 inch • 12 inches = 1 foot • 3 feet = 1 yard • 1760 yards = 1 mile • 36 inches = 1 yard • 440 yards = quarter mile • 880 yards = half mile
Distance
• 100 links = 1 chain • 10 chains = 1 furlong • 8 furlongs = 1 mile • 4 inches = 1 hand • 22 yards = 1 chain • 5.5 yards = 1 rod, pole or perch • 4 poles = 1 chain • 40 poles = 1 furlong
Volume
• 3 teaspoons = 1 tablespoon• 3 tablespoons = a jigger• 2 tablespoons is 1 fluid ounce• 8 fluid ounces = 1 cup• 2 cups = 1 pint• 2 pints = 1 quart• 4 quarts = 1 gallon• 55 gallons = 1 barrel of oil• 63 gallons = 1 hogshead
Keys to “Why Metric?”
A pint’s a pound the world around….
Only in the U.S. as the British pint is really 20 ounces.
Length
• 10 millimeters = 1 centimeter• 10 centimeters = 1 decimeter• 10 decimeters = 1 meter• 10 meters = 1 decameter• 10 decameters = 1 heptameter• 10 heptameters = 1 kilometer
1 Meter
• 1000 millimeters • 100 centimeters• 10 decimeters• 1 meter• 0.1 decameters• 0.01 heptameters • 0.001 kilometer
Words Having Meaning (in Latin)
• Milli = one thousandth• Centi = one-hundreth• Deci = one-tenth• Meter = Measure• Deca = ten• Hepto = one hundred• Kilo = one thousand
10n Prefix Short scale Long scale Decimal
1024 yotta Septillion Quadrillion 1000000000000000000000000
1021 zetta Sextillion Trilliard 1000000000000000000000
1018 exa Quintillion Trillion 1000000000000000000
1015 peta Quadrillion Billiard 1000000000000000
1012 tera Trillion Billion 1000000000000109 giga Billion Milliard 1000000000106 mega Million 1 000 000103 kilo Thousand 1000102 hecto Hundred 100101 deca Ten 10100 (none) One 110−1 deci Tenth 0.110−2 centi Hundredth 0.0110−3 milli Thousandth 0.00110−6 micro Millionth 0.00000110−9 nano Billionth Milliardth 0.00000000110−12 pico Trillionth Billionth 0.000000000001
10−15 femto Quadrillionth Billiardth 0.000000000000001
Recommended