Values that have very little spread around the mean value (though gives no indication of how close the results are to the true value)
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Define Repeatability
The original experiment can be repeated using the same method and equipment and getting the same results
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Define Reproducability
The experiment is repeated by another person, or using different equipment or techniques, and the same results are obtained
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Define Resolution
The smallest change in the quantity being measured of a measuring instrument that gives a perceptible change in the reading
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Define Accuracy
A measurement close to the true value
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Define Random Error
Causes readings to be spread about the true value, due to results varying in an unpredictable way from one measurement to the next
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Define Sytematic Error
Causes readings to differ from the true value by a consistent amount each time a measurement is made
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Define Amplitude
The maximum disturbance of a wave from its undisturbed position
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Define Frequency
The number of waves produced by a source each second
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Define Wavelength
The distance between a point on one wave and the same point on the next wave (usually measured crest to crest)
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Define Wave Speed
frequency x wavelength
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Define Phase
(tbc)
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Define Phase Difference
The distance between two waves at the same point
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Define Path Difference
The difference (in meters) between the lengths of two paths of two waves
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Define Coherence
A fixed relationship between the phase of waves in a beam of radiation of a single frequency. Two beams of light are coherent when the phase difference between their waves is constant
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Define Scalar
A quantity with magnitude but no direction
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Define Vector
A quantity with magnitude and direction
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Define a Moment
The turning effect of a force around a pivot
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Define Displacement
An overall change in an object's position
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Define Speed
The rate at which an object covers a distance
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Define Velocity
The rate at which the position of an object changes
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Define Acceleration
The rate at which an object changes its velocity
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Define Impulse
The change of momentum of an object when the object is acted upon by a force for an interval of time
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Define Hooke's Law
The force needed to extend or compress a spring a distance is proportional to that distance
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Define the Elastic Limit of a Material
The maximum extent to which a material may be stretched without permanent alteration of size or shape
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Define Tensile Stress
The force per unit area applied to a material
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Define Tensile Strain
The extension per unit length of a material
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Define Elastic Strain Energy
Up to the elastic limit of a material, all the work done in stretching it as stored potential energy
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Define Breaking Stress
The maximum stress a material can stand before it will break
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Define Resistance
voltage/current
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Define Terminal PD
The potential difference across a circuits terminals
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Define EMF
A potential difference that can induce current in a circuit
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Other cards in this set
Card 2
Front
Define Repeatability
Back
The original experiment can be repeated using the same method and equipment and getting the same results
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