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SI Units and Prefixes. SI units (The International System of Units) are essentially the basic units from which all other units are derived. It is important to learn the common units for physical quantities, but you may also be asked what these units are in terms of their base units.
Prefixes. In Physics we have to deal with quantities from the very large to the very small. A prefix is something that goes in front of a unit and acts as a multiplier. This sheet will give you practice at converting figures between prefixes. (3)! Complete the table, below: (4)! Convert the figures into the prefixes required.
This tutorial will not only go over some of the most commonly used units in electronics but will also teach you the metric prefixes that help describe all of these base units in quantities ranging from the insanely large to the incredibly small.
SI Prefixes: When setting up a conversion factor to or from a base unit, use 1 for the prefixed unit and the power of 10 in front of the base unit. Example: 1 mg = 10-3 g; 1 kg = 103 g. Enter 103 in your calculator by typing 1 E 3 (using a button labeled E, EE, or EXP).
Worksheet and video links on the topic of SI units and their prefixes for A level physics, covering base units, derived units, prefixes, converting between prefixes.
1. Give the abbreviation for each of the SI base units below. a. kilogram b. Kelvin c. meter d. second kg K m s 2. State what quantities the following SI units are used to measure. a. kg - mass b. m - distance c. s - time d. K - temperature 3. Give the power of 10 that each of the following prefixes represents.
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