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Unit and Unit conversion
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Problem description:
Unit and Unit conversion
| Quantitative name | symbol | SL unit | Illegal measurement unit | |||
| Name | unit | operation unit | name | unit | ||
| length | L | rice | m | km | ||
| cm | ||||||
| mm | ||||||
| area | A | Square meter | m2 | cm2 | mu | a |
| mm2 | acre | ha | ||||
| volume | V | cubic meter | m3 | Mg | Lift | l |
| g | ||||||
| mg | ||||||
| quality | m | kilogram | kg | Ton | t | |
| time | t | Second | s | minute | min | |
| Hour | h | |||||
| Day | d | |||||
| Angle speed | n | Per second | 1/s | Subcontamination | 1/min | |
| s-1 | min-1 | |||||
| speed | v | Rice per second | m/s | Kilometers per hour | km/h | |
| Volume | V | Cubic meter per second | m3/s | m3/h | ||
| l/min | ||||||
| l/s | ||||||
| force | F | Newton | N | |||
| pressure | p | Newton per square meter | N/m2 | bar | bar | |
| Pa | Pa | |||||
| energy | W | joule | J | Kilowatt -hour | kWh | |
| achievement | ||||||
| hot | E | |||||
| Torque | M | Meter | Nm | |||
| joule | J | |||||
| power | P | watt | W | |||
| Radiation energy | ||||||
| Heat radiation | ||||||
| dynamic viscosity | η(μ) | Pahe second | Pas | |||
| Motion viscosity | v | Square meter per second | m2/s | |||
| temperature | Kelvin | K | Degree Celsius | ℃ | ||
| frequency | f | hertz | Hz | |||
Length unit
1 in (inch) = 25.4mm (mm)
1 ft (feet) = 0.3048 m (meters)
Quality unit
1 lb (pound) = 0.4536 kg (kg)
1 OZ (ounce) = 28.3495 g (gram)
Temperature unit
℃ = k -273.15
1 = ℃ x 1.8 + 32
Volume (volume) unit
1 litre (lit) = 10-3 m3
1 in3 (cubic inch) = 16.39 cm3
1 ft3 (cubic foot) = 28.32 dm3
1 US GAL (Micharine) = 3.79 DM3
1 uk gal (Micharine) = 4.55 dm3
1 US FL OZ (beauty liquid ounce) = 29.57 cm3
1 UK FL OZ (British liquid ounce) = 28.41 CM3
1 dm3 (cubic meter) = 0.0353 IN3
Force unit
1 kgf (kgl) = 9.81 n
1 lbf (pound force) = 4.45 n
Torque unit
1 kg • m (kg • meter) = 9.807n • m (Niu • meter)
1 kg • m (kg • meter) = 87.11lb • in (pound • inch)
1 in • lb = 0.113n • m
1 ft • LB (Fifty • pound) = 1.356 n • m
Stress unit
1 psi (pound force/square inch) = 6895 PA (Pa)
1 BAR (Baz) = 105 PA
1 BAR = 14.5 PSI
Flow unit
QN value = standard flow (L/min), that is, the flow measured by P1 = 0.6MPa, △ P = 0.1MPa of the valve.
KV value = 20 ℃ clear water to drop △ P = 0.1 mpa to measure the flow (m3/h) when valve.
CV value = 60 清 clear water to drop △ P = 1 PSI (0.07bar) The flow measured by valve (US GAL/MIN)
S value = effective cross -sectional area (MM2), there is a thin -walled flow hole with an area of S. When the throwing hole is the same as the measured component, when the air flow is equal The S -value S -value is an effective cross -sectional area of the measured components.
Calculating formula:
S = qn x 0.018
S = KV x 19.84
KV = QN/100
CV = QN/984
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