A number in the form a × 10^b where 1 ≤ |a| < 10 and b is an integer.
Example: 3.45 × 10^8
Similar to scientific notation, but the exponent is a multiple of 3 (便于与SI单位前缀对应).
Example: 345 × 10^6
Common in computing: the "E" represents "× 10^".
Example: 3.45E+8
| Constant | Value | Scientific |
|---|---|---|
| Speed of Light (c) | 299,792,458 m/s | 2.99792 × 10^8 |
| Avogadro's Number (N_A) | 602,252,000,000,000,000,000,000 | 6.02252 × 10^23 |
| Planck's Constant (h) | 0.0000000000000000000000000000006626 | 6.626 × 10^-34 |
| Electron Mass (m_e) | 0.000000000000000000000000000000911 | 9.11 × 10^-31 |
| Elementary Charge (e) | 0.0000000000000000001602 | 1.602 × 10^-19 |
| Gravitational Constant (G) | 0.0000000000667 | 6.67 × 10^-11 |
| Prefix | Symbol | Power of 10 |
|---|---|---|
| Tera | T | 10^12 |
| Giga | G | 10^9 |
| Mega | M | 10^6 |
| Kilo | k | 10^3 |
| Milli | m | 10^-3 |
| Micro | μ | 10^-6 |
| Nano | n | 10^-9 |
| Pico | p | 10^-12 |