AS91521: 3.1 Carry out a practical investigation to test a physics theory relating two variables in a non-linear relationship (4 credits)
Carry out a practical investigation involves:
- collecting data relevant to the aim based on the manipulation of the independent variable over a reasonable range and number of values
- determining appropriate uncertainties in raw data
- using graphical analysis, including a consideration of uncertainties, from which the equation of the relationship / value of the physics quantity can be determined
- providing a conclusion that states the equation of the relationship / value of the physics quantity as determined from the graph and includes a comparison with the physics theory.
- describing the control of other variable(s) that could significantly affect the results
- using techniques to improve the accuracy of measurements
- determining uncertainties in one of the variables expressed in the graphical analysis
- graphical analysis which expresses the uncertainty in the relationship consistent with the uncertainty in the data
- providing a conclusion that makes a quantitative comparison between the physics theory and the relationship / quantity obtained from the experimental data which includes consideration of uncertainties.
- the other variable(s) that could have changed and significantly affected the results, and how they could have changed the results
- the limitations to the theory’s applicability both in the practical situation and/or at extreme values of the independent variable
- any unexpected outcomes of the processing of the results and a suggestion of how they could have been caused and the effect they had on the validity of the conclusion.
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2_graphing_with_uncertainties.pptx | |
File Size: | 269 kb |
File Type: | pptx |
3_discussion_pointers.ppt | |
File Size: | 160 kb |
File Type: | ppt |