What does u stand for in metric system?
unified atomic mass unit
u [1] the SI symbol for the unified atomic mass unit, as defined in 1960 and accepted by both chemists and physicists. u [2] a common replacement for the Greek letter µ as a symbol for the micron or micrometer. The correct symbol for this unit is µm.
What is the prefix for 10⁹?
The 20 SI Prefixes
| Multiple | Amount | Prefix |
|---|---|---|
| 109 | 1 thousand millions | giga |
| 106 | 1 million | mega |
| 103 | 1 thousand | kilo |
| 102 | 1 hundred | hecto |
What is the prefix for 10 7?
hebdo-
Other metric prefixes used historically include hebdo- (107) and micri- (10−14).
What unit is represented by u?
| Table 6. Units outside the SI that are accepted for use with the SI | ||
|---|---|---|
| Name | Symbol | Value in SI units |
| electronvolt (d) | eV | 1 eV = 1.602 18 x 10-19 J, approximately |
| unified atomic mass unit (e) | u | 1 u = 1.660 54 x 10-27 kg, approximately |
| astronomical unit (f) | au | 1 au = 149 597 870 700 m, exactly |
What is bigger than a kilogram?
To measure larger than kilograms, we use tonnes. 1 tonne = 1000 kg. To measure weights smaller than 1 gram, we can use milligrams (mg) and micrograms (µg).
What is after Pico?
We may write hW = 169 000 mm = 16 900 cm = 169 m = 0.169 km using the millimeter (SI prefix milli, symbol m), centimeter (SI prefix centi, symbol c), or kilometer (SI prefix kilo, symbol k)….Table 5. SI prefixes.
| Factor | Name | Symbol |
|---|---|---|
| 10-6 | micro | µ |
| 10-9 | nano | n |
| 10-12 | pico | p |
| 10-15 | femto | f |
What comes after Terra?
The prefix after tera- should be 10005, or peta-. Therefore, after terabyte comes petabyte. Next is exabyte, then zettabyte and yottabyte. When a hard drive says it has a capacity of 1 terabyte (TB), 10004, it might actually be 1 tebibyte (TiB), or 10244.
What is the prefix for 1 100?
centi-
| Prefix | Abbrev. | Multiply base unit by: |
|---|---|---|
| deci- | d | 1/10 = .1 = 10-1 |
| centi- | c | 1/100 = .01 = 10-2 |
| milli- | m | 1/1000 = .001 = 10-3 |
| micro- | μ (“mu”) | 1/million = 10-6 |
What is the symbol of Pico?
p
Table 5. SI prefixes
| Factor | Name | Symbol |
|---|---|---|
| 10-3 | milli | m |
| 10-6 | micro | µ |
| 10-9 | nano | n |
| 10-12 | pico | p |