# Physics Reviewer Notes

Jun 17th, 2015
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PHYSICS- Science of measurement- Branch of science on the study of nature SYSTEM MEASUREMENT• Metric System – SI( International) • English System – British Engineering System

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PHYSICSScience of measurementBranch of science on the study of natureSYSTEM MEASUREMENTMetric System SI( International)English System British Engineering SystemSIEnglishLengthMeter (m)Foot (f)MassKilogram (kg)Slug (sl)TimeSecond (s)Second (s)PREFIXES FOR SI UNITSPrefixSymbolMultiplierGiga (9)G1,000,000,000 = 109Mega (6)M1,000,000 = 106Kilo (3)k1,000 = 103Centi (-2)c0.01 = 10-2Mili (-3)m0.001 = 10-3Micro (-6)0.00000 = 10-6Nano (-9)0.00000000 =10-9SIGNIFICANT FIGURESAll non-zero digits are significantZero may/may not be significantThose used to position the decimal point are not significantTo remove ambiguity use scientific notation*If even nos.2.25 -> 2.22.45 -> 2.4*If odd nos.2.35 ->2.4*If the numbers are greater than 52.45 -> 2.5Example:4 Significant Figure; Proper SI form1. 0.000002584 meterAns. 2.584 micrometer / 2.5842. 9,763,560 byteAns. 9.764 gigabyte / 9.764 GBCONVERSION OF UNITSLength1m = 100cm = 1000 mm = 3.28 ft = 39.37 in1cm = 10mm1in = 2.54cm1ft = 12in1mi = 5280 ft = 1.61kmTime1min = 60s1hr = 60min = 360sMass1kg = 1000g = 2.205lb1slug = 14.59kgVolume1L = 1000mL=1000cc(cm3, cubi

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