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31 Cards in this Set
- Front
- Back
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Absolute Error
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The difference between an experimental value and the accepted value of a measured quantity.
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Accepted Value
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The most probable value for a measured quantity, which is usually published in reference books.
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Accurate
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Describes a measurement that is the same or very close to the accepted value.
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Constant Proportion
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The relationship that exists between two quantities when an increase in one causes no change in the other.
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Dependent Variable
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The quantity that changes in an experiment as a result of changes made by the experimenter.
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Derived Unit
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A combination of two or more fundamental units used to simplify notation.
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Direct Squared Proportion
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The relationship that exist between two quantities in which an increase in one causes a square increase in the other.
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Directly Proportional
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Applied to the relationship between two quantities in which an increase in one quantities in which an increase in the other or a decrease in one quantity causes a decrease in the other.
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Experimental Value
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Measurement made during laboratory work which may stand alone or be incorporated into one or more formulas to yield a value for a physical quantity.
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Extrapolation
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The Extenstion of a graphed line beyond the region in which data was taken.
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Force
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A push or pull on a mass;
A vector quantity. |
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Fundamental Unit
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One of a set of units in which all quantities measured by physicists can be expressed.
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Independent Variable
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The quantity that the experimenter changes in an experiment.
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Indirect Squared Proportional
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The relationship that exists between two quantities in which an increase in one causes a squared decrease in the other.
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Inversely Proportional
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Applies to the relationship between two quantities in which an increase in one quantity causes a decrease in the other or a decrease in one quantity causes an increase in the other.
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Line of Best Fit
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A straight or curved line on a graph which approximates the relationship among a set of data points.
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Mass
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The amount of matter contained in an object.
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Mean
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The average, x, of a set n measurements, where x, is the individual measurement and f(i) is the frequency of measurements.
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Percent Error
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A measure of the reliabity of an experimental result calculated be dividing the absolute error by the accepted value and multipling the quotient by 100.
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Precise
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Describes several measurements taken ok the same event that are nearly identical.
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Range
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The horizontal distance traveled by a projectile.
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Scalar
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A quantity that has magnitude only, with no direction specified.
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Scientific Notation
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A way of expressing quantities which consists of a number equal to or greater than one and less than ten followed by a multiplication sign and the base ten raised to some intergral power.
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SI Prefix
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A prefix combined with an SI base unit form a new unit that is larger or smaller than the base formed by a multiple or submultiple of 10.
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SI System
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Provides standardized units for scientific measurements.
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Significant Figures
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The digits in a measured quantity that are known with certainty plus the one digit whose value has been estimated.
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Slope
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The inclination of a graphed line, determined as the ratio (change of y/change of x) for any two points on the same time.
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Standard Deviation
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The square root of the variance of a set of data.
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Unit
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A standard quantity with which other similar quantities can be compared.
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Variance
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The sum of the squares of the differences if the measurements in a set of data from the mean of the set, divided by the number of measurements.
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Vector
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A quantity that has both magnitude and direction, often shown graphically as an arrow with definite length and direction.
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