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Vectors and scalars 131 distinguish between vector and scalar quantities, and give examples of each when expressing a quantity we give it a number and a unit (for example, 12 kg), this expresses the magnitude of the quantity. Average spring constant and uncertainty of the batch Â use the same person to take measurements each time error due to gravity was not a factor. There are two types of error which occur in measurements: 1 random errors random errors or uncertainties cause repeat measurements to vary.
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