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 Generally
The formula is very helpful with recurring arithmetic operations. Instead of again and again new find out, what is to be done with the length and width of a rectangle, in order to calculate its area, one should generally note
this approach. This can happen in the form
Area = Length · Width .
If one now uses the initial letters of the internationally valid, usually terms taken from the English language for the terms area, length and width, would have to stand there
A = l · b .
A formula is thus a description, which arithmetic operations are to be applied to the designator necessary for the calculation.
Dimension/
identifier
Si-Basic units boldface | Units | Conversation |
 | Angel (at the wheel) | ° (grad) | 1° = 60' (angle minutes)
1 ' = 60"
(angle seconds) |
 | Angel (at the steering wheel) | ° (grad) |
 | (Ignition interval) angel | ° (grad) |
 | Compression ratio | | |
 | Efficency |
 | Air/fuel ratio |
 | Friction |
 | circumference/diameter | 3,14159 ... |
 | Density | g/cm³ | 1 g/cm³ = 1 kg/dm³ = 1 t/m³ |
 | (Mechanical) tension | N/mm² | |
| a | acceleration | m/s² | |
| A | Area | mm², cm², dm²,
m², km² | 1 km²=1.000.000 m²
=10.000 cm²
=100 dm² |
| b | Width | mm, cm, dm, m | 1 m = 10 dm =
100 cm = 1000 mm |
| c | Fuel consumption | l/100 km | |
| d | Diameter, bore | mm, cm | 1 cm = 10 mm |
| E | Energy | Nm, Ws, J, kJ (Joule),
kWh | 1 Nm = 1 Ws = 1 J
1 kJ = 1000 J
1 kWh = 3600 kJ |
| f | Frequency | Hz (Herz), s-1 (1/s) | 1 Hz = 1 Oszillation/s. |
| F | Force | N, daN, kN | 1 kN = 100 daN
1 daN = 10 N
1 N = 1 kg·m/s² |
| g | Acceleration of gravity | 9,81 m/s² | |
| G | Weight | N, daN, kN | 1 kN = 100 daN
1 daN = 10 N
1 N = 1 kg·m/s² |
| h | Height | mm, cm, dm, m | 1 m = 10 dm = 100 cm = 1000 mm |
| i | Ratio | | |
| I | Current | A (Ampere) | 1 A = 1000 mA |
| K | Capacitance | Ah (Amperehours) | |
| l | Length | mm, cm, dm, m, km | 1 Seemeile = 1,852 km
1 Landmeile = 1,609 km
1 km = 1000 m
1 m = 10 dm = 100 cm = 1000 mm
1 Inch = 25,4 mm |
| m | Mass | g, kg, t (Tonne) | 1 t = 1000 kg
1 kg = 1000 g
1 pound (lb) = 453,59 g |
| M | Torque | Nm (Newtonmeter) | 1 N · 1 m = 1 Nm |
| n | numbers of revolutions | s-1 (1/s)
min-1 (1/min) | 1 s-1 = 60 min-1 |
| p | pressure | Pa (Pascal)
mbar, bar, N/cm² | 1 bar = 10 N/cm²
1 bar = 1000 mbar
1 bar = 100.000 Pa |
| P | Power | VA (Volt·Ampere),
W (Watt), kW,
PS (Horsepower) | 1 W = 1 J/s = 1 Nm/s = 1 kg·m²/s³
1 W = 1 VA
1 kW = 1000 W
1 kW =
1,3596 PS
1 PS = 735,5 W |
| Q | Heat quantity | Nm, Ws, J, kJ (Joule) | 1 Nm = 1 Ws = 1 J
1 kJ = 1000 J |
| r | Radius, lever arm | mm, cm, dm, m | 1 m = 10 dm = 100 cm = 1000 mm |
| R | Resistance | M , k, , m (Ohm) | 1 M = 1000 k
1 k = 1000
1 = 1000 m |
| s | Distance, stroke | mm, cm, dm, m, km | 1 km = 1000 m
1 m = 10 dm
1 dm = 10 cm
1 cm = 10 mm |
| t | Time (time) | h, min, s | 1 h = 60 min
1 min = 60 s |
| t | Temperature | °C (grad Celsius) | 0 °C = 32 °F, 100 °C = 212 °F |
| T | Periodic time | s (second) | |
| T | Temperature | K (Kelvin) | 0 °C = 273 K, 100 °C = 373 K |
| v | Velocity
(velocity) | km/h | 1 m/s = 3,6 km/h
1 km/h = 0,278 m/s |
| U | Voltage | V (Volt) | 1 V = 1000 mV |
| V | Volume | mm³, cm³ (ml),
dm³ (Liter), m³ | 1 m³ = 1000 dm³ (Liter)
1 dm³ (Liter) = 1000 cm³ (ml)
1 cm³ (ml) = 1000 mm³
1 barrel = 159 dm³ (Liter)
1
gallon = 3,79 dm³ (Liter) |
| W | Work | Nm, Ws, J, kJ (Joule) | 1 Nm = 1 Ws = 1 J
1 kJ = 1000 J |
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2001-2014 Copyright programs, texts, animations, pictures: H. Huppertz - Email
Translator: Don Leslie -
Email: lesdon@t-online.de | |
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