Post-grading feedback Lab 1

1. Following the 1st Feedback Blog Entry will help avoid many errors for the Lab1.
2. Memo writing was graded generously  but you must improve your memo writing. The blog entry Memo Writing for Lab Reports contains suggestions for writing a good Memo. We will not be so generous on future assignments.
3. In the US Customary Unit System a pound (lb) is used as a unit of both mass and force. Please use correct one when making your calculations.
4. If you need to convert mass into force, you cannot use g = 9.81 m/s². What value of g in the US Customary Units ft/s²? It was in the 10/9 lecture.
5. EXCEL -- starting Lab2 all exercise calculations must be done with Excel by entering formulas into cells for example =C31+D32 instead of =4+5
6. A common mistake was forgetting to multiply the pipe length by the number of stories.
7. When presenting two or more charts (as it was in Q6 Lab1), please format your graphs so they are both the same size.
8. Bridges charts – a legend was not needed since just one subject is featured. An appropriate title is sufficient. Conversion factors have to be taken with max or +2 extra sig figs than the data with max sig figs.
9. Please watch significant figures. An extra sig fig maybe excused in this class but still it simply is not needed. Correct number of sig figs will be increasingly enforced.
10. If  you used rounded intermediate calculations to arrive at a final answers there may have been a loss in precision. It’s best to put rounded values in a separate cell and use the cells with formulas when calculating your final answer. Then round the final answer.
11. In our comments s f = sig figs
12. ROUND for integers made easy with num_digits set as a negative integer. From Excel help: "If num_digits is less than 0, the number is rounded to the left of the decimal point"