physics notes 'N'

Rebekah’sPhysicsNotes CONTENTPAGE:1.formulaesheet-------------------------------------------------------------------------2-3 2.physicalquantities,unitsandmeasurements-----------------------------------4-9 3.kinematics----------------------------------------------------------------------------10-13 4.forceandpressure-----------------------------------------------------------------14-18 5.dynamics-----------------------------------------------------------------------------19-23 6.energy---------------------------------------------------------------------------------24-29 7.kineticparticlemodelofmatter-------------------------------------------------30-34 8.thermalprocesses-----------------------------------------------------------------35-41 9.generalwaveproperties----------------------------------------------------------42-44 10.electromagneticspectrum------------------------------------------------------45-47 11.electricchargeandcurrentofelectricity------------------------------------48-52 12.DCcircuits--------------------------------------------------------------------------53-54 13.practicalelectricity----------------------------------------------------------------55-60 14.radioactivity------------------------------------------------------------------------61-68 1

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CHAPTER1:PHYSICALQUANTITIES,UNITSANDMEASUREMENTSPrefixes:-Prefixesaremultiples/decimalsof10toconvenientlyexpressphysicalquantitiesthataretoobigortoosmallFactor Prefix symbolMultiple 10¹² Tera TMultiple 10 ⁹ Giga GMultiple 10 ⁶ Mega MMultiple 10³ Kilo kSubmultiple 10 ⁻ ¹ Deci dSubmultiple 10 ⁻ ² Centi cSubmultiple 10 ⁻ ³ Milli mSubmultiple 10 ⁻⁶ Micro µSubmultiple 10 ⁻⁹ Nano n Physicalquantities-physicalquantitiesisaquantitywhichcanbemeasuredwithameasuringinstrumentBasequantities SIunit UnitsymbolMass Kilogram KgTemperature Kelvin KLength Metre MCurrent Ampere ATime Second s 4

Measuringphysicalquantities:-lengthcanbemeasuredusingameterrulerandameasuringtapeDigital calipers-isusedtomeasuretheinternalandexternaldiameters,depthofanobjectaccurately.(0to15cm) Part FunctionInternaljaw MeasuringinternallengthofanobjectExternaljaw MeasuringexternallengthofanobjectTail MeasuringthedepthofanobjectLockingscrew ToensurethatthejawsdonotmoveapartDigitaldisplay Toshownumericvalue Digital Micrometer ScrewGauge-Usedtomeasureobjectsthataretoosmalltobemeasureusingthedigitalcaliper(0to2.5cm) 5

Parts FunctionAnvilandspindle UsedtomeasurethediameterofanobjectZerobutton UsedtoresetthedisplayedlengthbacktozeroDigitaldisplay UsedtoshowthenumericvalueRatchet ToadjustthespindlesothatitisincontactwiththeobjectMeasurestofollowtoensureaccuratereading:-ensurethatratchetisturneduntilspindleisincontactwithobject-objectisplacedinbetweenanvilandspindle-ensurethatobjectisheldtightlyinbetweenanvilandspindle-butnottootightasthismaycausedamagetotheobjectPrecisionofaninstrument:-thesmallestunitofaninstrumentcanmeasureisknownasitsprecisionInstrument MeasuringrangeMeasuringtape 0toseveralmetersMeterruler 0to1mDigital