dimensional analysis, derived units and density

I learned some very interesting things using the CK modalities today. The first thing I learned was about derived units. Derived units is a unit that is the result of two SI base units. An example of this would be velocity where it is calculated in meters per second and density which is mass/volume.

Another thing I learned was about density which I just mentioned earlier. Density is the ratio of the mass of an object to the object's volume which is displayed by the image above on the left. The SI unit for density is kilograms per cubic meter. This is pretty large however and alot of solids and liquids can be measured using just gram per cubic centimeter.

The 3rd thing I learned about was dimensional analysis. That's when you use units of measurements to solve certain problems. Usually you would solve them using conversion factors, which are ratios of equivalent measurements. For example the SI units of length has a conversion factor of 10 as you can see below.

The ck12 modules were a good way for me to get visual representation of what I am learning and I thoroughly enjoyed them.