Today was another density/sig fig day. We began going over homework, taking notes about how density is calculated. Density = mass/volume, with the units of g/ml for liquids and g/cc for solids. Water's density is 1.0 g/ml. You can find out if an object is less dense or more dense than water by placing the object into water. If it floats, it is less dense. If it sinks, it is more dense. We dropped bouncy balls and homies into the water and watched the magic.
Next we moved on to calculating with sig figs. When you add or subtract, you round the answer to the same place value of whichever of your numbers has less places. When you multiply or divide, you round to the sig figs of whichever number has the fewest. Watch this video to help you better understand, and also to blow your mind.
Sweet justice.
