Difference between revisions of "Data collection"
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{{DISPLAYTITLE:Replication Station → Data collection}} | {{DISPLAYTITLE:Replication Station → Data collection}} | ||
==Unit Conversions== | ==Unit Conversions== | ||
| + | '''Why care about inches?''' | ||
| + | * In the Imperial system of measurement, inches are usually divided into halves, which means base 2 for anything shorter 1 inch. 1/2", 1/4", 1/8", and 1/16" are commonly used measurements. | ||
| + | * If you view the listings for block neodymium magnets from a supplier such as Magnet4less.com, Magnet4sale.com, or KJmagnetics.com, you can find out that magnet lengths, widths, and heights are in inches. | ||
| + | * While the metric system is clearly more useful for scientific purposes, the base 2 system used for sub-inch imperial mesaurements is actually quite helpful for interlocking objects of different sizes together. | ||
'''Useful''' | '''Useful''' | ||
* 1 inch (in) = 2.54 centimeters (cm) | * 1 inch (in) = 2.54 centimeters (cm) | ||
* 1 foot (ft) = 0.3084 meters (m) | * 1 foot (ft) = 0.3084 meters (m) | ||
* 1 cubic inch (in³) = 16.39 milliliters (mL) = 1.639 * 10^-5 cubic meters (m³) | * 1 cubic inch (in³) = 16.39 milliliters (mL) = 1.639 * 10^-5 cubic meters (m³) | ||
| − | * 1 | + | '''Logical''' |
| − | * 1 | + | * 1 amp-hour (Ah) = 3600 Coulombs (C) |
| − | * 1 cubic meter = 10^3 cubic decimeters (dm³) = 10^6 cubic centimeters (cm³) | + | * 1 milliamp-hour (mAh) = 3.6 Coulombs (C) |
| − | * 1 cubic meter = 10^3 liters (L) = 10^6 milliliters (mL) | + | * 1 cubic meter (m³) = 10^3 cubic decimeters (dm³) = 10^6 cubic centimeters (cm³) |
| − | ''' | + | * 1 cubic meter (m³) = 10^3 liters (L) = 10^6 milliliters (mL) |
| + | '''Strange''' | ||
* 1 gallon (gal) = 2^2 quarts (qt) = 2^3 pints (pt) = 2^4 cups (C) = 2^7 fluid ounces (fl oz.) = 2^8 tablespoons (Tbps) | * 1 gallon (gal) = 2^2 quarts (qt) = 2^3 pints (pt) = 2^4 cups (C) = 2^7 fluid ounces (fl oz.) = 2^8 tablespoons (Tbps) | ||
* 2000 Calories (kCal) = 2.324 kilowatt-hours (kWh) | * 2000 Calories (kCal) = 2.324 kilowatt-hours (kWh) | ||
* 100 Calories per 2 Tablespoons (kCal/Tbsp) = 3,930 watt-hours per liter (Wh/L) | * 100 Calories per 2 Tablespoons (kCal/Tbsp) = 3,930 watt-hours per liter (Wh/L) | ||
| + | '''Surprising''' | ||
* Energy of a <span style="color:red">'''neodymium magnet'''</span> at 1.5 Tesla (T) | * Energy of a <span style="color:red">'''neodymium magnet'''</span> at 1.5 Tesla (T) | ||
**(1.5 Tesla)^2/(2*4pi*10^-7 Henries per meter) * (1.639 * 10^-5 cubic meters) = <span style="color:red">'''14.67 Newton-meters (Nm) in a cubic inch'''</span> | **(1.5 Tesla)^2/(2*4pi*10^-7 Henries per meter) * (1.639 * 10^-5 cubic meters) = <span style="color:red">'''14.67 Newton-meters (Nm) in a cubic inch'''</span> | ||
Revision as of 02:37, 24 April 2016
Unit Conversions
Why care about inches?
- In the Imperial system of measurement, inches are usually divided into halves, which means base 2 for anything shorter 1 inch. 1/2", 1/4", 1/8", and 1/16" are commonly used measurements.
- If you view the listings for block neodymium magnets from a supplier such as Magnet4less.com, Magnet4sale.com, or KJmagnetics.com, you can find out that magnet lengths, widths, and heights are in inches.
- While the metric system is clearly more useful for scientific purposes, the base 2 system used for sub-inch imperial mesaurements is actually quite helpful for interlocking objects of different sizes together.
Useful
- 1 inch (in) = 2.54 centimeters (cm)
- 1 foot (ft) = 0.3084 meters (m)
- 1 cubic inch (in³) = 16.39 milliliters (mL) = 1.639 * 10^-5 cubic meters (m³)
Logical
- 1 amp-hour (Ah) = 3600 Coulombs (C)
- 1 milliamp-hour (mAh) = 3.6 Coulombs (C)
- 1 cubic meter (m³) = 10^3 cubic decimeters (dm³) = 10^6 cubic centimeters (cm³)
- 1 cubic meter (m³) = 10^3 liters (L) = 10^6 milliliters (mL)
Strange
- 1 gallon (gal) = 2^2 quarts (qt) = 2^3 pints (pt) = 2^4 cups (C) = 2^7 fluid ounces (fl oz.) = 2^8 tablespoons (Tbps)
- 2000 Calories (kCal) = 2.324 kilowatt-hours (kWh)
- 100 Calories per 2 Tablespoons (kCal/Tbsp) = 3,930 watt-hours per liter (Wh/L)
Surprising
- Energy of a neodymium magnet at 1.5 Tesla (T)
- (1.5 Tesla)^2/(2*4pi*10^-7 Henries per meter) * (1.639 * 10^-5 cubic meters) = 14.67 Newton-meters (Nm) in a cubic inch
- Conclusion: A cubic inch neomagnet, if depleted of its magnetic energy, could not even run a 15 watt light bulb for one second.
- Energy of a AA Battery (7.7 mL) at 1.5 Volts (V) and 2000 milliamp-hours (mAh)
- (1.5 Volts * 7200 Coulombs) * (16.39 ml / 7.7 mL) = 22,990 Newton-meters (Nm) in a cubic inch (> 1,500x)
- Conclusion: The magnetic field energy of a magnet, if depleted, would yield less than 0.1% as much energy as a battery of the same size.
- Energy of Peanut Butter at 100 Calories per 2 Tablespoons
- (3,930 Wh/L) * (3600 Nm/Wh) * (0.01639 L) = 231,900 Newton-meters (Nm) in a cubic inch (> 15,000x)
- Conclusion: Food sources of energy can be substantially more energy dense than typical battery tech.
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