IB DP Physics: SL复习笔记1.1.1 SI Units
SI Base Quantities International System (S.I.) Units There is a seemingly endless number of units in Physics These can all be reduced to seven base units from which every other unit can be derived ...
IB DP Chemistry: SL复习笔记11.2.6 Analysing Graphs
Analysing Graphs The?gradient?of a graph can be found by: In the case of a straight line graph: using a triangle and the equation for a straight line In the case of a curve: drawing a?tangent?to th...
IB DP Chemistry: SL复习笔记11.2.5 Drawing Graphs
Drawing Graphs General guidance on drawing graphs Graphs need to have: Clear title Labelled axes Units on the axes Appropriate linear scales without any jumps This means the plotted graph must occu...
IB DP Chemistry: SL复习笔记11.2.4 Percentage Error
Percentage Error Percentage error?is used to express the difference between a final calculated answer and an accepted or literature value It is calculated using the following formula You should be ...
IB DP Chemistry: SL复习笔记11.2.3 Reducing the Impact of Errors
Reducing Errors Random errors?can be reduced by repeated trials and measurements Multiple measurements when averaged will reduce the impact of a?random error?on the average The more readings you ha...
IB DP Chemistry: SL复习笔记11.2.2 Processing Errors
Types of Errors An error is the difference between a value or quantity obtained in an experiment and an accepted or literature value for an experiment There are two types of errors in experiments,?...
IB DP Chemistry: SL复习笔记11.2.1 Recording Data
Qualitative & Quantitative data When recording results of experiment, both?quantitative?and?qualitative?data should be obtained Quantitative data?is obtained from measurements whereas?qualitati...
IB DP Chemistry: SL复习笔记11.1.4 Infrared Spectroscopy
How IR Spectroscopy works All?covalent bonds?act rather like springs, as opposed to rigid bars Like springs, the bonds can vibrate in a number of different ways The frequency of vibration occurs in...
IB DP Chemistry: SL复习笔记11.1.3 Nuclear Magnetic Resonance Spectroscopy
How NMR works Nuclear Magnetic Resonance (NMR)?spectroscopy is used for analysing organic compounds Only atoms with?odd?mass numbers?show signals on?NMR?spectra and have the property of?nuclear?spi...
