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1、C1.1 Measurements in physicsl Fundamental/base quantities：Fundamental/base quantitiessymbolLengthMassmTimetElectric currentITemperatureTAmount of substancenLuminous intensity (not required in DP)l Derived quantities：Volume, density, speed, acceleration, forcel Fundamental SI units:Fundamental/base q
2、uantitiesFundamental SI unitsLengthMeter (m)MassKilogram (kg)TimeSecond (s)Electric currentAmpere (A)TemperatureKelvin (K)Amount of substanceMole (mol)Luminous intensity (not required in DP)NOS: reading p2l Derived SI units:TOK: HW: 100-words essay on p3l Significant figures:Exa.1: 345 34.50.03450.3
3、450345.003450034500.0l Scientific notation/standard form:Exa.2: C=299792458ms-1 (round to one significant figures/ three significant figures)l Calculation:In multiplication or division, the result must have as many significant figures as the least precisely known number entering the calculation.Exa.
4、3: 23578=1329413000 6.2441.25=4.99525.00In adding and subtracting, the number of decimal digits in the answer must be equal to the least number of decimal places in the numbers added or subtracted.Exa.4: 3.21+4.1=7.32 7.3 12.367-3.15=9.217 9.22l Metric multipliers/prefix:Exa.5: workbook P3Q11l Order
5、s of magnitude:-A number rounded to the nearest power of 10. Exa.6：Estimate orders of magnitude of an adult human massExa.7: Evaluate the following calculations:a. 1.40106+3.5105b. 3.71052.1108c. 3.71052.110-8d. 4.81053.1102e. (3.6107)3Exa.8: Estimate how many grains of sand are required to fill the volume of the Earth.(The radius of the Earth is about 6x106m)Exa.9: Estimate the speed with which human hair grows.HW: workbook 1.1