Some conversions I do over and over and over and over in my head. Others are just nifty. So I'm finally going to write them down. And you thought I was random before?\n";
echo "
\n";
echo "\n";
echo "
Length
\n";
echo "
\n";
echo "- 1 mile = 5280 feet
\n";
echo "- 1 mile = 80 chains
\n";
echo "- 1 chain = 66 feet
\n";
echo "- 1 foot = 30.5 cm
\n";
echo "- 1 land league = 4.83 km
\n";
echo "- 1 nautical league = 5.56 km
\n";
echo "- 1 hair's bredth = 0.1 mm
\n";
echo "- 1 hand = 4 inches
\n";
echo "
\n";
echo "
Area
\n";
echo "
\n";
echo "- 1 acre = 209 ft x 209 ft
\n";
echo "- 1 hectare = 100 m x 100 m
\n";
echo "
\n";
echo "
Volume
\n";
echo "
\n";
echo "- 1 inch³ = 16.387 cc
\n";
echo "- 1 foot³ = 28.317 L
\n";
echo "- 1 foot³ = 1728 inch³
\n";
echo "- 1 gallon = 231 inch³
\n";
echo "
\n";
echo "
Weight
\n";
echo "
\n";
echo "- 1 ounce = 28.3 g
\n";
echo "
\n";
echo "
Cooking
\n";
echo "
\n";
echo "- 1 quart = 4 cups
\n";
echo "- 1 pint = 2 cups
\n";
echo "- 1 cup = 16 TBSP
\n";
echo "- 1 cup = 237 mL
\n";
echo "- 1 TBSP = 3 TSP
\n";
echo "- 1 liquid ounce = 1/8 cup
\n";
echo "- 1 shot = 1 liquid ounce
\n";
echo "- 2 pinches = 1/8 TSP
\n";
echo "- 1 dash = 1/8 TSP
\n";
echo "- 20 drops = 1 mL
\n";
echo "- 1 pound butter = 2 cups
\n";
echo "
\n";
echo "
Speed
\n";
echo "
\n";
echo "- 1 m/s = 3.6 km/h
\n";
echo "- speed of sound = ~340m/s
\n";
echo "
\n";
echo "
Temperature
\n";
echo "
\n";
echo "- -40 C = -40 F
\n";
echo "- 0 C = 32 F
\n";
echo "- 100 C = 212 F
\n";
echo "
\n";
echo "
Numbers
\n";
echo "
\n";
echo "- 1 Dozen = 12
\n";
echo "- 1 Baker's dozen = 13
\n";
echo "- 1 Gross = 1 Dozen Dozen = 144
\n";
echo "- 1 Score = 20
\n";
echo "
\n";
echo "
Roman Numerals
\n";
echo "
\n";
echo "- • = 1/12
\n";
echo "- S = 1/2
\n";
echo "- N = 0
\n";
echo "- I = 1
\n";
echo "- V = 5
\n";
echo "- X = 10
\n";
echo "- L = 50
\n";
echo "- C = 100
\n";
echo "- D = 500
\n";
echo "- M = 1000
\n";
echo "
\n";
echo "
\n";
echo "
Density
\n";
echo "
\n";
echo "- Water = 1g/cm³
\n";
echo "- Concrete = 2.3g/cm³
\n";
echo "- Steel = 7.85g/cm³
\n";
echo "- Aluminum = 2.7g/cm³
\n";
echo "- Gravel = 2.75g/cm³
\n";
echo "- Styrofoam = 0.075g/cm³
\n";
echo "- Gold = 19.32g/cm³
\n";
echo "
\n";
echo "
PVC Pipe (schedule 40)
\n";
echo "
\n";
echo "\n";
echo "Dia
inch | \nOD
inch | \nWall
inch | \nArea
inch² | \nMax
psi | \n";
echo "
\n";
echo "\n| ½ | \n0.840 | \n0.109 | \n0.304 | \n600 | \n
\n";
echo "\n| ¾ | \n1.050 | \n0.113 | \n0.533 | \n480 | \n
\n";
echo "\n| 1 | \n1.315 | \n0.133 | \n0.864 | \n450 | \n
\n";
echo "\n| 1¼ | \n1.380 | \n0.140 | \n1.496 | \n370 | \n
\n";
echo "\n| 1½ | \n1.900 | \n0.145 | \n2.036 | \n330 | \n
\n";
echo "\n| 2 | \n2.375 | \n0.154 | \n3.356 | \n300 | \n
\n";
echo "\n| 2½ | \n2.875 | \n0.203 | \n4.788 | \n280 | \n
\n";
echo "\n| 3 | \n3.500 | \n0.216 | \n7.393 | \n260 | \n
\n";
echo "\n| 4 | \n4.500 | \n0.237 | \n12.730 | \n220 | \n
\n";
echo "
\n";
echo "
Max Psi Based on Temp
PVC Pipe (schedule 40)
\n";
echo "
\n";
echo "- 23 C = 100%
\n";
echo "- 27 C = 90%
\n";
echo "- 32 C = 75%
\n";
echo "- 38 C = 62%
\n";
echo "- 43 C = 50%
\n";
echo "- 49 C = 40%
\n";
echo "- 54 C = 30%
\n";
echo "- 60 C = 22%
\n";
echo "
\n";
echo "
Wire Guage
\n";
echo "
\n";
echo "- 28 guage = 1.4 amps
\n";
echo "- 24 guage = 3.5 amps
\n";
echo "- 20 guage = 11 amps
\n";
echo "- 18 guage = 16 amps
\n";
echo "- 16 guage = 22 amps
\n";
echo "- 14 guage = 32 amps
\n";
echo "- 10 guage = 55 amps
\n";
echo "- 8 guage = 73 amps
\n";
echo "- 6 guage = 101 amps
\n";
echo "- 4 guage = 135 amps
\n";
echo "- 2 guage = 181 amps
\n";
echo "- 1 guage = 211 amps
\n";
echo "- 0 guage = 245 amps
\n";
echo "- 00 guage = 283 amps
\n";
echo "- 000 guage = 328 amps
\n";
echo "
\n";
echo "
\n";
echo "
Sheer = 60% * Tensile
\n";
echo "
\n";
echo "- Mild steel = 55 ksi
\n";
echo "
\n";
echo "- Stainless steel 303 = 85 ksi
\n";
echo "- Stainless steel 304 = 75 ksi
\n";
echo "- Stainless steel 309 = 75 ksi
\n";
echo "- Stainless steel 316 = 75 ksi
\n";
echo "- Stainless steel 321 = 75 ksi
\n";
echo "- Stainless steel 416 = 80 ksi
\n";
echo "- Stainless steel 420 = 95 ksi
\n";
echo "- Stainless steel 440F Se = 100 ksi
\n";
echo "
\n";
echo "- Aluminum 2014-T4, -T451 = 62 ksi
\n";
echo "- Aluminum 2014-T6, -T651 = 70 ksi
\n";
echo "- Aluminum Alclad 2014-T3 = 63 ksi
\n";
echo "- Aluminum Alclad 2014-T4, -T451 = 61 ksi
\n";
echo "- Aluminum Alclad 2014-T6, -T651 = 68 ksi
\n";
echo "- Aluminum 2024-T3 = 70 ksi
\n";
echo "- Aluminum 2024-T361 = 72 ksi
\n";
echo "- Aluminum 2024-T4, T351 = 68 ksi
\n";
echo "- Aluminum 2024-T6 = 69 ksi
\n";
echo "- Aluminum 2024-T81, -T851 = 70 ksi
\n";
echo "- Aluminum 2024-T861 = 75 ksi
\n";
echo "- Aluminum 6013-T8 = 64 ksi
\n";
echo "- Aluminum 7075-T6, -T651 = 83 ksi
\n";
echo "
\n";
echo "
\n";
echo "
Shoe Sizes
\n";
echo "
\n";
echo "
![](\"./images/knowledge/shoesizechart.png\")
\n";
echo "
\n";
echo "