Unit Analysis

This class we learned about dimensional analysis.

Here are the steps:
1. Identify the units that you want to end up with
2. Find a conversion factor
3. Place units in a correct place
4. canceling units

So you want to convert grams into pounds, when you set up your equation you want to cancel out the grams so you must place them opposite, so at the denominator. It takes 1000 grams to make one kilogram. Now changing it again into pounds, the kilogram needs to canceled out so place the unit in the denominator again. It takes 2.2 pounds to make a kilogram. Now you multiply across, then divide from the bottom. That's how you get your answer.

Measurements

We reviewed the common SI prefixes in the Metric system. The important prefixes we have to know are mega-, kilo-, centi-, milli-, micro-, and nano-.

We also learned what a meniscus is.

Three reasons how an error might occur in an experiment:
1) Physical errors in measuring device
2) "Sloppy" measuring
3) Changing ambient conditions

Absolute Error = measured - accepted
+ means over accepted
- means under accepted