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# BCIT Department of Physics MGO-03 – WorksheetVersion: Jan-23 – 1 – © Dr. M. HarderMGO-03: Graphical Analysis – WorksheetMaximum Score: 18 1. [4]

BCIT Department of Physics MGO-03 – Worksheet

Version: Jan-23 – 1 – © Dr. M. Harder

MGO-03: Graphical Analysis – Worksheet

Maximum Score: 18

1. [4] Include the following four GraphIt outputs (plot and fit results) with your submission:

(1) Data Set 1 fit with Model 1.1
(2) Data Set 1 fit with Model 1.2
(3) Data Set 2 fit with Model 2.1
(4) Data Set 2 fit with Model 2.2

Ensure that: (i) Your axes are properly labelled, including units; (ii) Your graph has an
appropriate title; (iii) You follow the formatting requirements of Sec. 2 in the
introduction.

From now on all of these conditions must be met as a default when submitting any
plot.

2. [1] For Data Set 1, write out the relationship between Model 1.1 and the hypothesis.

The answer for this question is:

𝒚 = 𝑽; 𝒙 = 𝑰; 𝑨 = 𝑽𝟎; 𝑩 = 𝑹

You can simply write out this answer on your worksheet. The reason I am writing it
here is so you know what I mean when I ask for “the relationship between the model
and hypothesis equations, and you can now perform this same analysis for the other
hypotheses and models in this experiment.

3. [1] Write out your fit equation for Data Set 1, using Model 1.1. Ensure: (i) That you use
the appropriate variables and that all fit coefficients: (ii) Include uncertainties; (iii) Are
properly rounded; and (iv) Include appropriate units.

From now on all of these conditions must be met as a default when writing out any fit
equation, in any experiment we do.

4. [1] Based on your fit, is 𝐴 consistent with zero? In other words, does 𝐴 overlap with zero

within experimental uncertainty?

5. [1] For Data Set 1, write out the relationship between Model 1.2 and the hypothesis.

6. [1] Write out your fit equation for Data Set 1, using Model 1.2.

MGO-03 – Worksheet BCIT Physics Department

– 2 – © Dr. M. Harder

7. [1] Based on your answer to question 3 and the conditions for selecting an appropriate
model equation (see p. 2 of the MGO-03 lab description), should you use Model 1.1 or
Model 1.2 to fit Data Set 1?

8. [1] For Data Set 2, write out the relationship between Model 2.1 and the hypothesis.

9. [1] Write out your fit equation for Data Set 2, using Model 2.1.

10. [1] For Data Set 2, write out the relationship between Model 2.2 and the hypothesis.

11. [1] Write out your fit equation for Data Set 2, using Model 2.2.

12. [2] Show your calculation of ρ and Δρ using Data Set 2 and your Model 2.2 fit.

13. [1] State your final result for ρ ± Δρ. Make sure to properly round your result, and