Dates

- Period A: Tuesday, January 12th
- Period B: Tuesday, January 12th
- Period F: Wednesday, January 13th

Sig Fig Math

- Review Homework
- Questions? Examples?

Units

- measurements have quantity and units
- measurements incomplete without units
- we treat units with respect

Example

- J = Pa m
^{3} - Pa = N/m
^{2} - N = kg(m/s
^{2}) - using this information express J using only kg, m, s

Dimensional Analysis

- conversions = goal is cancelling units
- ex: m –> km
- more complex examples
- density is an example of unit conversion

Practice

- Ch. 1 (39, 44)

Homework

- Finish Practice Problems

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