SI units: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
SI units are now the general fundamental units for scientific work. The main basic units with which you will be concerned are the meter (m), the gram (g) and the second (s). Other non-SI units, notably minute (min), hour (h), degree Celsius (°C) and litre (l) are still commonly used in science, and will be used in this manual frequently. When using abbreviations, never add the letter "s" in an attempt to signify plurals. Below are some of the common symbols: | SI units are now the general fundamental units for scientific work. The main basic units with which you will be concerned are the meter (m), the gram (g) and the second (s). Other non-SI units, notably [[minute|minute]] (min), hour (h), degree [[Celsius|Celsius]] (°C) and [[litre|litre]] (l) are still commonly used in science, and will be used in this manual frequently. When using abbreviations, never add the letter "s" in an attempt to signify plurals. Below are some of the common symbols: | ||
{| width="200" border="1" align="center" cellpadding="1" cellspacing="1" | {| width="200" border="1" align="center" cellpadding="1" cellspacing="1" | ||
| Line 30: | Line 30: | ||
<br> | <br> | ||
(1 l = 10<sup>3</sup> ml = 10<sup>6</sup> μl, 1g = 10<sup>3</sup> mg = 10<sup>6</sup> μg) | (1 l = 10<sup>3</sup> ml = 10<sup>6</sup> μl, 1g = 10<sup>3</sup> mg = 10<sup>6</sup> μg) | ||
<br>The units of amount of substance, [[Mole|mole]] (mol), and concentration of substance [[Molarity|molar]] (M) are also frequently used.<br> | <br>The units of amount of substance, [[Mole|mole]] (mol), and concentration of substance [[Molarity|molar]] (M) are also frequently used.<br> | ||
Revision as of 22:09, 27 July 2010
SI units are now the general fundamental units for scientific work. The main basic units with which you will be concerned are the meter (m), the gram (g) and the second (s). Other non-SI units, notably minute (min), hour (h), degree Celsius (°C) and litre (l) are still commonly used in science, and will be used in this manual frequently. When using abbreviations, never add the letter "s" in an attempt to signify plurals. Below are some of the common symbols:
| Symbol | Prefix | Factor |
| c | centi | 10-2 |
| m | milli | 10-3 |
| μ | micro | 10-6 |
| n | nano | 10-9 |
| p | pico | 10-12 |
(1 l = 103 ml = 106 μl, 1g = 103 mg = 106 μg)
The units of amount of substance, mole (mol), and concentration of substance molar (M) are also frequently used.