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Key Concepts of Physics
26/06/2019 Key Concepts of Physics 2016 EdExcel GCSE Physics Topic 1 W Richards The Weald School
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International System of Units
26/06/2019 There are six basic quantities we need to know about. Their units are called S.I. units: Base quantity Base unit Symbol Length metre m Mass kilogram kg Time second s Current ampere A Temperature Kelvin K Amount of substance mole mol
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Standard Form and prefixes
26/06/2019 Prefix Symbol Multiplier Giga G 109 Mega M 106 Kilo K 103 Centi c 10-2 Milli m 10-3 Micro μ 10-6 Nano n 10-9 Now try these conversions: What is 1 metre in mm? What is 1 metre in nanometres? What is 10mm in metres? What is 100 micrometres in metres? What is 100 micrometres in mm? What is 1mm in nanometres? 0.001m or 10-3m m or 10-9m 0.01m or 10-2m 0.0001m or 10-4m 0.1mm 1,000,000nm or 106nm
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Other conversions and significant figures
26/06/2019 Other conversions and significant figures Can you answer these questions? What is 1KW in watts? What is 1MW in watts? What is 1 minute in seconds? What is half an hour in seconds? What is 18,765 to 3 significant figures? What is in standard form and to 3 significant figures? What is milliamps in amps, to 3 significant figures? A physics lesson is one hour 20 mins long. What is this in seconds in standard form and to 3 significant figures? 1000W 106W 60s 1800s 18,800 5.48x10-3 1.54x10-4A 4.80x103s
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