Chapter 1 Physics
Terms
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- What is a unit?
- A unique name we assign to measures of a quantity.
- What is a standard?
- Something we compare a measure of each physical quantity in its own units.
- What is a base standard?
- The internationally agreed upon standards which all other physical measures are based upon.
- What is the International System of Units (SI)?
- Seven internationally agreed upon base quantities, thereby forming the basis of the International System of Units, abbreviated SI from its French name and popularly known as the metric system.
- What is a conversion factor?
- A ratio of units equal to 1.
- What is a meter?
- The meter is the length of the path traveled by light in a vacuum during a time interval of 1/299792458 of a second.
- What is a kilogram?
- A platinum–iridium cylinder kept at the International Bureau of Weights and Measures near Paris and assigned, by international agreement, a mass of 1 kilogram.
- What is an atomic mass unit?
- 1.6605402 x 10^-27 kg (the mass of one hydrogen atom.
- What are the three base units of SI?
-
1. length: m
2. mass: kg
3. time: s - What does the prefix "kilo-" mean?
- 10^3
- What does the prefix "mega-" mean?
- 10^6
- What does the prefix "centi-" mean?
- 10^-2
- What does the prefix "milli-" mean?
- 10^-3
- What does the prefix "micro-" mean?
- 10^-6
- What does the prefix "nano-" mean?
- 10^-9
- What does the prefix "pico-" mean?
- 10^-12