FAP0015_Ch01_Measurement

# FAP0015_Ch01_Measurement - Chapter 1 Measurement Quantities...

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16/06/11 08:01 FAP0015 PHYSICS I 1 Chapter 1: Measurement Quantities Prefixes Errors & Accuracy

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16/06/11 08:01 FAP0015 PHYSICS I 2 At the end of the lesson, students should be able to: 1. state the meaning & give examples of physical quantities 2. distinguish between base quantities & derived quantities 3. state what the standards are measured against 4. write values in prefix or standard forms 5. apply dimensional analysis to solve equations 6. state the different types of errors 7. define the terms ‘ precision ’ and ‘ accuracy 8. determine the uncertainty or error of a measurement. Lesson Outcomes
16/06/11 08:01 FAP0015 PHYSICS I 3 A physical quantity is quantity with a numerical value and units. Physical Quantities Physical quantities are assigned to measurements taken . Physics is a quantitative science based on measurement.

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16/06/11 08:01 FAP0015 PHYSICS I 4 Base quantities are the ones that you can measure directly by using suitable instruments. Mass , length and time are examples of base quantities . There are so many physical quantities and they can be categorised as base and derived quantities . Base and Derived Quantities
16/06/11 08:01 FAP0015 PHYSICS I 5 The International System of Units or SI ( Système International ), is a name adopted by the Eleventh General Conference on Weights and Measures , held in Paris in 1960, for a universal , unified , self- consistent system of measurement units based on the mks ( meter-kilogram-second ) system *. * Microsoft® Encarta® Encyclopedia 2003. © 1993-2002 Microsoft Corporation.

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16/06/11 08:01 FAP0015 PHYSICS I 6    QUANTITY   NAME OF BASE SI UNIT SYMBO L Table 1. Base Quantities   Length meter m   Mass kilogram kg   Time second s   Electric current ampere A   Temperature Kelvin K   Amount of substance mole mol   Luminous intensity candela cd
16/06/11 08:01 FAP0015 PHYSICS I 7 Any physical quantity will comprise of certain base quantities . For example, if you combine length and time accordingly, you might find the speed , which is a derived quantity . If you combine two or more base quantities accordingly, you will get a derived quantity . Other derived quantities include area , acceleration, density, energy and power .

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16/06/11 08:01 FAP0015 PHYSICS I 8 Table 2 : Derived Quantities   QUANTITY NAME OF DERIVED Sl UNIT SYMBOL   Area square metre 3
16/06/11 08:01 FAP0015 PHYSICS I 9 Vector and Scalar Quantities A physical quantity is categorized either as a vector or scalar quantity. A

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FAP0015_Ch01_Measurement - Chapter 1 Measurement Quantities...

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