Light, Sound, Gravity |
Speed of Light Vaccum |
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c | = | 299,792,458 | m / s |
= | 983,571,056 | ft / s | |
= | 670,616,629 | mph | |
= | 186,282 | mi / s | |
≈ | 1 | ft / ns |
Speed of Sound Sea Level |
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cs | ≈ | 765 | mph |
≈ | 342 | m / s | |
≈ | 1,122 | ft / s | |
≈ | 374 | yd / s | |
≈ | 1 mi / 5 s |
Acceleration due to Gravity (g) |
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By International Definition | |||
g | = | 9.80665 | m / s2 |
= | 32.1740 | ft / s2 | |
≈ | 21.9 | mph / s | |
≈ | 35.3 | kph / s |
ft m yd mi |
- - - - |
feet meters yards miles |
s ns mph kph |
- - - - |
seconds nanoseconds miles per hour kilometers / hour |
Frequency, Wavelength, Period |
Parameter | Equations | Unit Dimensions |
---|---|---|
Frequency | f = c / λ = 1 / T | Cycles / Second (Hz) |
Period | T = λ / c = 1 / f | Time to Complete 1 Cycle |
Wavelength | λ = c / f = c T | Distance 1 Cycle Covers at the Speed of Light (c) |
f | = Frequency | Hz | = Hertz (1/s) | |
T | = Period | c | = Speed of Light | |
λ | = Wavelength |
Calculate Wavelength and Period
Frequency |
Electromagnetic Waves |
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Electric Field (E)
Permittivity (Farads / meter) |
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εo | = | µo-1 c-2 | F/m |
= | 8.854 188 x 10-12 | F/m |
Magnetic Field (H)
Permeability (Henrys / meter) |
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µo | = | 4 π x 10-7 | H/m |
= | 1.256 637 x 10-6 | H/m |
Intrinsic Impedance (ohms) | |||
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Zo | = | E / H | Ω |
= | µo c | Ω | |
= | ( µ0 / εo )0.5 | Ω | |
= | ( εo c )-1 | Ω | |
= | 376.73 | Ω |
k | = | 1.380 649 x 10-23 | Watt*sec/°K |
Math Functions |
Natural Logarithms (ln) base
e = 2.71828 18284 59045 23536 02874 71352 66249 77572 47093 69995... |
Pi
π = 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510... |
log10 (x) | = | ln (x) ln (10) |
≈ | 0.4343 ln (x) |
ln (x) | = | log10 (x) log10 (e) |
≈ | 2.303 ln (x) |
π Rad = 180° | |||
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1 Rad | = | ( 180 / π ) | ° |
≈ | 57.3 | ° | |
1° | = | ( π / 180 ) | Rad |
= | 0.0175 | Rad | |
= | 17.5 | mR |
Degrees to / from Radians
Angle
Angle |
° | -- Degrees |
Rad | -- Radians |
mR | -- milliradians |
Distance, Speed, Acceleration Conversions |
DISTANCE | ||
---|---|---|
1 in = | 0.0254 | m |
1 ft = | 12 | in |
= | 1/ 3 | yd |
= | 0.3048 | m |
1 yd = | 36 | in |
= | 3 | ft |
= | 0.9144 | m |
1 m = | 1 / 0.0254 | in |
= | 1 / 0.3048 | ft |
= | 1 / 0.9144 | yd |
DISTANCE | ||
---|---|---|
1 km = | 1 / 1.852 | NM |
= | 1 / 1.609344 | mi |
= | 1 / 0.0009144 | yd |
= | 1 / 0.0003048 | ft |
= | 1000 | m |
1 mi = | 1609.344 / 1852 | NM |
= | 1.609344 | km |
= | 1760 | yd |
= | 5280 | ft |
= | 1609.344 | m |
DISTANCE | ||
---|---|---|
1 NM = | 1852 / 1609.344 | mi |
= | 1.852 | km |
= | 1852 / 0.9144 | yd |
= | 1852 / 0.3048 | ft |
= | 1852 | m |
1 NM (UK) = | 1853.184 | m |
in | - | inch | |
ft | - | feet | |
yd | - | yards | |
m | - | meters |
km | - | kilometers |
mi | - | miles (statute) |
NM | - | Nautical Miles |
SPEED | ||
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1 m / s = | 1 / 0.3048 | ft / s |
3.6 | kph | |
1 / 0.44704 | mph | |
900 / 463 | knots | |
1 ft / s = | 0.3048 | m / s |
1.09728 | kph | |
15 / 22 | mph | |
274.32 / 463 | knots |
SPEED | ||
---|---|---|
1 kph = | 1 / 3.6 | m / s |
5 / 5.4864 | ft / s | |
1 / 1.609344 | mph | |
1 / 1.852 | knots | |
1 mph = | 0.44704 | m / s |
22 / 15 | ft / s | |
1.609344 | kph | |
402.336 / 463 | knots | |
1 knot = | 463 / 900 | m / s |
463 / 274.32 | ft / s | |
1.852 | kph | |
463 / 402.336 | mph |
ACCELERATION | ||||
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Exact | Approximate | |||
1 m / s2 = | 1 / 0.3048 | = | 3.2808 | ft / s2 |
9 / 2.5 | = | 3.6 | kph / s | |
1 / 0.44704 | = | 2.2369 | mph / s | |
900 / 463 | = | 1.9438 | knots / s | |
1 / 9.80665 | = | 0.1020 | g's | |
1 ft / s2 = | 0.3048 | = | 0.3048 | m / s2 |
15 / 22 | = | 0.6818 | mph / s | |
1.09728 | = | 1.0973 | kph / s | |
274.32 / 463 | = | 0.5925 | knots / s | |
0.3048 / 9.80665 | = | 0.0311 | g's | |
1 mph / s = | 22 / 15 | = | 1.4667 | ft / s2 |
0.44704 | = | 0.447 | m / s2 | |
1.609344 | = | 1.6093 | kph / s | |
402.336 / 463 | = | 0.8690 | knots / s | |
0.44704 / 9.80665 | = | 0.0456 | g's |
ACCELERATION | ||||
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Exact | Approximate | |||
1 kph / s = | 2.5 / 9 | = | 0.2778 | m / s2 |
5 / 5.4864 | = | 0.9113 | ft / s2 | |
1 / 1.609344 | = | 0.6214 | mph / s | |
1 / 1.852 | = | 0.54 | knots / s | |
2.5 / (9 * 9.80665) | = | 0.0283 | g's | |
1 knot / s = | 463 / 900 | = | 0.5144 | m / s2 |
463 / 274.32 | = | 1.6878 | ft / s2 | |
463 / 402.336 | = | 1.1508 | mph / s | |
1.852 | = | 1.852 | kph / s | |
463 / (900 * 9.80665) | = | 0.0525 | g's | |
1 g = | 9.80665 | = | 9.81 | m / s2 |
9.80665 / 0.3048 | = | 32.1740 | ft / s2 | |
9.80665 [ 3600 / (5280 * 0.3048)] | = | 21.9369 | mph / s | |
3.6 * 9.80665 | = | 35.3039 | kph / s | |
3600 * 9.80665 / 1852 | = | 19.0626 | knots / s |
Temperature |
°C | -- | Degrees Celsius (or Centigrade) Water freezes at 0°C and boils at 100°C |
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°F | -- | Degrees Fahrenheit Water freezes at 32°F and boils at 212°F |
°K | -- | Degrees Kelvin Thermodynamic temperature 0°K is absolute zero 0°K = -273.15°C = -459.67°F |
Temperature Conversions
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Decimal Multipliers |
Decimal Multiplier Prefixes > 1
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Decimal Multiplier Prefixes < 1
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In the U.S. sometimes g's or a grand refers to a thousand (1000).
OTA DTv
Constants and Conversions |