physics 11 ch 1 summary 0.0 / 5 ? PhysicsmeasurementsA2/A-levelAll boards Created by: UchaCreated on: 31-12-19 12:56 physics is a study of entire physical world 1 of 12 length,mass and time are the most basic quantities that can be used to describe the physical world 2 of 12 derived quantities can be described on the basis of combination of the base quantities 3 of 12 international system of units SI units 4 of 12 SI units internationally adopted system of units used by all scientists and almost all the countries of the world. 5 of 12 systematic errors errors that occur due to incorrect design or calibrations of measuring instrument. 6 of 12 random errors are due to an unknown cause 7 of 12 accuracy accuracy of a measurement is the extent to which systematic error make measured value different from its true value. 8 of 12 how can be accuracy indicated? it can be indicated by the number of significant figures or by a stated uncertainty. 9 of 12 dimension each basic physical quantity represented by a specific symbol written within square brackets is called a dimension 10 of 12 equations must be dimentionaly consistent 11 of 12 two terms can only be added when they have the same dimensions 12 of 12
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