fermtometer | 1 fm | 2 fm | 3 fm | 4 fm | 5 fm | 6 fm | 7 fm | 8 fm | 9 fm | 10 fm | 11 fm | 12 fm | 13 fm | 14 fm | 15 fm | 16 fm | 17 fm | 18 fm | 19 fm | 20 fm | 21 fm | 22 fm | 23 fm | 24 fm | 25 fm | 26 fm | 27 fm | 28 fm | 29 fm | 30 fm | 31 fm | 32 fm | 33 fm | 34 fm | 35 fm | 36 fm | 37 fm | 38 fm | 39 fm | 40 fm | 41 fm | 42 fm | 43 fm | 44 fm | 45 fm | 46 fm | 47 fm | 48 fm | 49 fm | 50 fm | 51 fm | 52 fm | 53 fm | 54 fm | 55 fm | 56 fm | 57 fm | 58 fm | 59 fm | 60 fm | 61 fm | 62 fm | 63 fm | 64 fm | 65 fm | 66 fm | 67 fm | 68 fm | 69 fm | 70 fm | 71 fm | 72 fm | 73 fm | 74 fm | 75 fm | 76 fm | 77 fm | 78 fm | 79 fm | 80 fm | 81 fm | 82 fm | 83 fm | 84 fm | 85 fm | 86 fm | 87 fm | 88 fm | 89 fm | 90 fm | 91 fm | 92 fm | 93 fm | 94 fm | 95 fm | 96 fm | 97 fm | 98 fm | 99 fm | 100 fm |
cable length (International) | 5.3995680345572 × 10-18 cable length (International) | 1.0799136069114 × 10-17 cable length (International) | 1.6198704103672 × 10-17 cable length (International) | 2.1598272138229 × 10-17 cable length (International) | 2.6997840172786 × 10-17 cable length (International) | 3.2397408207343 × 10-17 cable length (International) | 3.7796976241901 × 10-17 cable length (International) | 4.3196544276458 × 10-17 cable length (International) | 4.8596112311015 × 10-17 cable length (International) | 5.3995680345572 × 10-17 cable length (International) | 5.939524838013 × 10-17 cable length (International) | 6.4794816414687 × 10-17 cable length (International) | 7.0194384449244 × 10-17 cable length (International) | 7.5593952483801 × 10-17 cable length (International) | 8.0993520518359 × 10-17 cable length (International) | 8.6393088552916 × 10-17 cable length (International) | 9.1792656587473 × 10-17 cable length (International) | 9.719222462203 × 10-17 cable length (International) | 1.0259179265659 × 10-16 cable length (International) | 1.0799136069114 × 10-16 cable length (International) | 1.133909287257 × 10-16 cable length (International) | 1.1879049676026 × 10-16 cable length (International) | 1.2419006479482 × 10-16 cable length (International) | 1.2958963282937 × 10-16 cable length (International) | 1.3498920086393 × 10-16 cable length (International) | 1.4038876889849 × 10-16 cable length (International) | 1.4578833693305 × 10-16 cable length (International) | 1.511879049676 × 10-16 cable length (International) | 1.5658747300216 × 10-16 cable length (International) | 1.6198704103672 × 10-16 cable length (International) | 1.6738660907127 × 10-16 cable length (International) | 1.7278617710583 × 10-16 cable length (International) | 1.7818574514039 × 10-16 cable length (International) | 1.8358531317495 × 10-16 cable length (International) | 1.889848812095 × 10-16 cable length (International) | 1.9438444924406 × 10-16 cable length (International) | 1.9978401727862 × 10-16 cable length (International) | 2.0518358531317 × 10-16 cable length (International) | 2.1058315334773 × 10-16 cable length (International) | 2.1598272138229 × 10-16 cable length (International) | 2.2138228941685 × 10-16 cable length (International) | 2.267818574514 × 10-16 cable length (International) | 2.3218142548596 × 10-16 cable length (International) | 2.3758099352052 × 10-16 cable length (International) | 2.4298056155508 × 10-16 cable length (International) | 2.4838012958963 × 10-16 cable length (International) | 2.5377969762419 × 10-16 cable length (International) | 2.5917926565875 × 10-16 cable length (International) | 2.645788336933 × 10-16 cable length (International) | 2.6997840172786 × 10-16 cable length (International) | 2.7537796976242 × 10-16 cable length (International) | 2.8077753779698 × 10-16 cable length (International) | 2.8617710583153 × 10-16 cable length (International) | 2.9157667386609 × 10-16 cable length (International) | 2.9697624190065 × 10-16 cable length (International) | 3.0237580993521 × 10-16 cable length (International) | 3.0777537796976 × 10-16 cable length (International) | 3.1317494600432 × 10-16 cable length (International) | 3.1857451403888 × 10-16 cable length (International) | 3.2397408207343 × 10-16 cable length (International) | 3.2937365010799 × 10-16 cable length (International) | 3.3477321814255 × 10-16 cable length (International) | 3.4017278617711 × 10-16 cable length (International) | 3.4557235421166 × 10-16 cable length (International) | 3.5097192224622 × 10-16 cable length (International) | 3.5637149028078 × 10-16 cable length (International) | 3.6177105831533 × 10-16 cable length (International) | 3.6717062634989 × 10-16 cable length (International) | 3.7257019438445 × 10-16 cable length (International) | 3.7796976241901 × 10-16 cable length (International) | 3.8336933045356 × 10-16 cable length (International) | 3.8876889848812 × 10-16 cable length (International) | 3.9416846652268 × 10-16 cable length (International) | 3.9956803455724 × 10-16 cable length (International) | 4.0496760259179 × 10-16 cable length (International) | 4.1036717062635 × 10-16 cable length (International) | 4.1576673866091 × 10-16 cable length (International) | 4.2116630669546 × 10-16 cable length (International) | 4.2656587473002 × 10-16 cable length (International) | 4.3196544276458 × 10-16 cable length (International) | 4.3736501079914 × 10-16 cable length (International) | 4.4276457883369 × 10-16 cable length (International) | 4.4816414686825 × 10-16 cable length (International) | 4.5356371490281 × 10-16 cable length (International) | 4.5896328293737 × 10-16 cable length (International) | 4.6436285097192 × 10-16 cable length (International) | 4.6976241900648 × 10-16 cable length (International) | 4.7516198704104 × 10-16 cable length (International) | 4.8056155507559 × 10-16 cable length (International) | 4.8596112311015 × 10-16 cable length (International) | 4.9136069114471 × 10-16 cable length (International) | 4.9676025917927 × 10-16 cable length (International) | 5.0215982721382 × 10-16 cable length (International) | 5.0755939524838 × 10-16 cable length (International) | 5.1295896328294 × 10-16 cable length (International) | 5.1835853131749 × 10-16 cable length (International) | 5.2375809935205 × 10-16 cable length (International) | 5.2915766738661 × 10-16 cable length (International) | 5.3455723542117 × 10-16 cable length (International) | 5.3995680345572 × 10-16 cable length (International) |
The femtometre (American spelling femtometer, symbol fm derived from the Danish and Norwegian word femten, "fifteen"+Ancient Greek: μέτρον, metrοn, "unit of measurement") is an SI unit of length equal to 10−15 metres, which means a quadrillionth of one. This distance can also be called a fermi and was so named in honour of physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fermtometer | fm | 1000 attometres = 1 femtometre = 1 fermi = 0.001 picometre = 1×10−15 metres 1000000 femtometres = 10 ångström = 1 nanometre. | ≡ 1×10-15 m | Metric system SI |
fermtometers | cable length (International) | fermtometers | cable length (International) |
---|---|---|---|
1 | ≡ 5.3995680345572E-18 | 4 | ≡ 2.1598272138229E-17 |
1.5 | ≡ 8.0993520518359E-18 | 4.5 | ≡ 2.4298056155508E-17 |
2 | ≡ 1.0799136069114E-17 | 5 | ≡ 2.6997840172786E-17 |
2.5 | ≡ 1.3498920086393E-17 | 5.5 | ≡ 2.9697624190065E-17 |
3 | ≡ 1.6198704103672E-17 | 6 | ≡ 3.2397408207343E-17 |
A cable length or length of cable is a nautical unit of measure equal to one tenth of a nautical mile or approximately 100 fathoms. The unit is named after the length of a ship's anchor cable in the Age of Sail. The definition varies:
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
cable length (International) | ≡ 1⁄10 nmi | ≡ 185.2 m | Imperial/US |
cable length (International) | fermtometers | cable length (International) | fermtometers |
---|---|---|---|
1 | ≡ 1.852E+17 | 4 | ≡ 7.408E+17 |
1.5 | ≡ 2.778E+17 | 4.5 | ≡ 8.334E+17 |
2 | ≡ 3.704E+17 | 5 | ≡ 9.26E+17 |
2.5 | ≡ 4.63E+17 | 5.5 | ≡ 1.0186E+18 |
3 | ≡ 5.556E+17 | 6 | ≡ 1.1112E+18 |
fermtometers | cable length (International) |
---|---|
1 | ≡ 5.3995680345572 × 10-18 |
1.852 × 1017 | ≡ 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |