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11 Cards in this Set
- Front
- Back
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Accuracy |
FD: How close a measurement or an experimental result is to the literature/commonly accepted value |
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Precision |
FD: How close a set of measurements is compared to each other/the number of sig fig for a single measurement/the standard deviation for a set of measurements |
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Systematic error |
An error that results in all measurements deviating from the true value by the same amount
FD: Usually leads to low accuracy |
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Random error |
Random deviation of measurements from the true values
FD: Usually leads to low precision. Random errors can be reduced by taking repeated readings |
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Order of magnitude |
FD: The power of 10 in the standard form-expression of a figure |
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Fundamental units |
kg (mass) m (length) s (time) mole (amount of matter) Kelvin (temperature) Ampere (current) |
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Derived units |
Units derived from fundamental units |
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Absolute uncertainty, fraction uncertainty, percentage uncertainty |
When two quantities are multiplied/divided, uncertainty = addition of percentage uncertainties
When a quantity is to the power of something, uncertainty = percentage uncertainty multiplied by the power
When two quantities are added/subtracted, uncertainty = addition of absolute uncertainties |
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Vector |
A quantity that has both a magnitude (value) and a direction in space
FD: Examples include velocity, force, field |
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Scalar |
A quantity that has only a magnitude but no direction
FD: Examples include temperature, pressure, speed, distance |
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Resolving vectors |
FD: Using trigonometry to express a vector, which is diagonal with respect to two chosen, perpendicular axes as a sum of two vectors along each chosen axis |
