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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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