Dates

- Friday, January 13th

Lab Recap A – How many digits?

- Beaker (50-mL)
- Beaker (1000-mL)
- Graduated Cylinder (25-mL)
- Graduated Cylinder (100-mL)
- Graduated Cylinder (1000-mL)
- Flask (250-mL)
- Buret (50-mL)
- Glass Thermometer
- Digital Thermometer
- Top-Loading Balance (400-g)
- Analytical Balance

Uncertainty of Each Device

- Determine the absolute uncertainty in each device
- Determine the relative uncertainty in each device assuming a measurement that is the maximum for the device
- Determine the relative uncertainty in each device assuming a measurement that is half of the maximum for the device
- Patterns?
- How can I use this to determine the best device for the job?

“Trigger Words” in Lab – Why?

- right / wrong
- good / bad
- error
- precise
- accurate

~~Organizing Information~~

~~Data Tables~~~~Units~~~~Goals of Data Presentation~~

~~Sig Figs~~

~~How many sig figs in a measurment?~~~~Examples~~~~Is there such thing as an “exact” measurment?~~

Homework

- Review Sci Notation (Ch. 2)
- Ch 2 (5 – 12)
- SPREAD OUT WORK
- Note: even though we didn’t get to this in class the way I wished, go ahead and do your best after reviewing the textbook.

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