Table of Contents
What does the prefix Exa mean?
Exa is a decimal unit prefix in the metric system denoting 1018 or 1000000000000000000. It was added as an SI prefix to the International System of Units (SI) in 1975, and has the unit symbol E. Exa comes from the ancient Greek ἕξ héx, used as a prefix ἑξά- hexá-, meaning six (like hexa-), because it is equal to 10006.
How many Exa are there?
The ascending prefixes tera (10004), peta (10005), exa (10006), zetta (10007), and yotta (10008) are based on the Greek-derived numeric prefixes tetra (4), penta (5), hexa (6), hepta (7), and octo (8).
What is the symbol for the prefix micro?
μ
Prefixes
| Purpose | Name | Symbol |
|---|---|---|
| smaller quantities or sub units | milli Example: milliliter | m |
| micro Example: microgram | μ | |
| nano Example: nanometer | n | |
| pico Example: picogram | p |
What is the prefix for 100000?
mega-
Metric Units of Measurement
| Prefix | Abbreviation | Factor (size) |
|---|---|---|
| mega- | M | 1,000,000 x or 106 |
| 100,000 x or 105 | ||
| 10,000 x or 104 | ||
| kilo- | k | 1,000 x or 103 |
What is the prefix for 10-12?
pico
The 20 SI Prefixes
| Multiple | Amount | Prefix |
|---|---|---|
| 10-9 | 1 thousandth of a millionth | nano |
| 10-12 | 1 millionth of a millionth | pico |
| 10-15 | 1 thousandth of a millionth of a millionth | femto |
| 10-18 | 1 millionth of a millionth of a millionth | atto |
What are some examples of numerical prefixes?
Numerical Prefixes Prefix Prefix meaning Sample words uni- 1 unicorn: mythical creature with one horn mono- 1 monorail: train that runs on one track bi- 2 bicycle: two-wheeled vehicle tri- 3 triceratops: three-horned dinosaur
What is the prefix for power of 10?
SI Prefixes and Symbols Used to Denote Powers of 10. Prefix Multiple Symbol yotta 10 24: Y zetta : 10 21: Z exa : 10 18: E peta : 10 15: P tera : 10 12: T giga : 10 9: G mega : 10 6: M kilo : 10 3: k hecto : 10 2: h deca : 10 : da deci : 10-1: d centi : 10-2: c
How many prefixes are there in the prefix mega?
1960 – Two prefixes were made obsolete (myria and myrio) and 6 were added, including 3 for forming multiples (mega, giga, tera) and 3 for forming submultiples (micro, nano, pico). Total Prefixes: 12.
What are the prefixes in a systematic name?
Systematic names use numerical prefixes derived from Greek, with one principal exception, nona-. They occur as prefixes to units of measure in the SI system. See SI prefix. They occur as prefixes to units of computer data. See binary prefixes.