decare | 1 Da | 2 Da | 3 Da | 4 Da | 5 Da | 6 Da | 7 Da | 8 Da | 9 Da | 10 Da | 11 Da | 12 Da | 13 Da | 14 Da | 15 Da | 16 Da | 17 Da | 18 Da | 19 Da | 20 Da | 21 Da | 22 Da | 23 Da | 24 Da | 25 Da | 26 Da | 27 Da | 28 Da | 29 Da | 30 Da | 31 Da | 32 Da | 33 Da | 34 Da | 35 Da | 36 Da | 37 Da | 38 Da | 39 Da | 40 Da | 41 Da | 42 Da | 43 Da | 44 Da | 45 Da | 46 Da | 47 Da | 48 Da | 49 Da | 50 Da | 51 Da | 52 Da | 53 Da | 54 Da | 55 Da | 56 Da | 57 Da | 58 Da | 59 Da | 60 Da | 61 Da | 62 Da | 63 Da | 64 Da | 65 Da | 66 Da | 67 Da | 68 Da | 69 Da | 70 Da | 71 Da | 72 Da | 73 Da | 74 Da | 75 Da | 76 Da | 77 Da | 78 Da | 79 Da | 80 Da | 81 Da | 82 Da | 83 Da | 84 Da | 85 Da | 86 Da | 87 Da | 88 Da | 89 Da | 90 Da | 91 Da | 92 Da | 93 Da | 94 Da | 95 Da | 96 Da | 97 Da | 98 Da | 99 Da | 100 Da |
barn | 1.0 × 1031 b | 2.0 × 1031 b | 3.0 × 1031 b | 4.0 × 1031 b | 5.0 × 1031 b | 6.0 × 1031 b | 7.0 × 1031 b | 8.0 × 1031 b | 9.0 × 1031 b | 1.0 × 1032 b | 1.1 × 1032 b | 1.2 × 1032 b | 1.3 × 1032 b | 1.4 × 1032 b | 1.5 × 1032 b | 1.6 × 1032 b | 1.7 × 1032 b | 1.8 × 1032 b | 1.9 × 1032 b | 2.0 × 1032 b | 2.1 × 1032 b | 2.2 × 1032 b | 2.3 × 1032 b | 2.4 × 1032 b | 2.5 × 1032 b | 2.6 × 1032 b | 2.7 × 1032 b | 2.8 × 1032 b | 2.9 × 1032 b | 3.0 × 1032 b | 3.1 × 1032 b | 3.2 × 1032 b | 3.3 × 1032 b | 3.4 × 1032 b | 3.5 × 1032 b | 3.6 × 1032 b | 3.7 × 1032 b | 3.8 × 1032 b | 3.9 × 1032 b | 4.0 × 1032 b | 4.1 × 1032 b | 4.2 × 1032 b | 4.3 × 1032 b | 4.4 × 1032 b | 4.5 × 1032 b | 4.6 × 1032 b | 4.7 × 1032 b | 4.8 × 1032 b | 4.9 × 1032 b | 5.0 × 1032 b | 5.1 × 1032 b | 5.2 × 1032 b | 5.3 × 1032 b | 5.4 × 1032 b | 5.5 × 1032 b | 5.6 × 1032 b | 5.7 × 1032 b | 5.8 × 1032 b | 5.9 × 1032 b | 6.0 × 1032 b | 6.1 × 1032 b | 6.2 × 1032 b | 6.3 × 1032 b | 6.4 × 1032 b | 6.5 × 1032 b | 6.6 × 1032 b | 6.7 × 1032 b | 6.8 × 1032 b | 6.9 × 1032 b | 7.0 × 1032 b | 7.1 × 1032 b | 7.2 × 1032 b | 7.3 × 1032 b | 7.4 × 1032 b | 7.5 × 1032 b | 7.6 × 1032 b | 7.7 × 1032 b | 7.8 × 1032 b | 7.9 × 1032 b | 8.0 × 1032 b | 8.1 × 1032 b | 8.2 × 1032 b | 8.3 × 1032 b | 8.4 × 1032 b | 8.5 × 1032 b | 8.6 × 1032 b | 8.7 × 1032 b | 8.8 × 1032 b | 8.9 × 1032 b | 9.0 × 1032 b | 9.1 × 1032 b | 9.2 × 1032 b | 9.3 × 1032 b | 9.4 × 1032 b | 9.5 × 1032 b | 9.6 × 1032 b | 9.7 × 1032 b | 9.8 × 1032 b | 9.9 × 1032 b | 1.0 × 1033 b |
The decare (/ˈdɛkɑːr/ or /ˈdɛkɛər/) is derived from deca and are, and is equal to 10 ares or 1000 square metres. It is used in Norway and in the former Ottoman areas of the Middle East and the Balkans (Bulgaria) as a measure of land area. Instead of the name "decare", the names of traditional land measures are usually used, redefined as one decare:
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
decare | Da | ≡ 1000 m2 | ≡ 1000 m2 | Metric system SI |
decares | barns | decares | barns |
---|---|---|---|
1 | ≡ 1.0E+31 | 6 | ≡ 6.0E+31 |
2 | ≡ 2.0E+31 | 7 | ≡ 7.0E+31 |
3 | ≡ 3.0E+31 | 8 | ≡ 8.0E+31 |
4 | ≡ 4.0E+31 | 9 | ≡ 9.0E+31 |
5 | ≡ 5.0E+31 | 10 | ≡ 1.0E+32 |
A barn (symbol: b) is a unit of area equal to 10−28 m2 (100 fm2). Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is also used in all fields of high-energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
barn | b | ≡ 10−28 m2 | ≡ 10−28 m2 | Nuclear Physics |
barns | decares | barns | decares |
---|---|---|---|
1 | ≡ 1.0E-31 | 6 | ≡ 6.0E-31 |
2 | ≡ 2.0E-31 | 7 | ≡ 7.0E-31 |
3 | ≡ 3.0E-31 | 8 | ≡ 8.0E-31 |
4 | ≡ 4.0E-31 | 9 | ≡ 9.0E-31 |
5 | ≡ 5.0E-31 | 10 | ≡ 1.0E-30 |
decares | barns |
---|---|
1 | ≡ 1.0 × 1031 |
1.0 × 10-31 | ≡ 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 …) |