Cells are made up of a cell nucleus (where the DNA is found), an outside membrane called the cell wall, a fluid in side the membrane called the cytoplasm and things called organelles which float...
The fundamental base units are: Distance: A measure of length (the SI unit is the meter,m) Mass: A measure of matter (the SI unit is the kilogram, kg) Time: A measure of duration (the SI unit is the...
If the wave speed is measured in m/s, the wave length is measured in m, and the wave speed divided by the wave length = the frequency, then: m/s / m = 1/s thus the unit of frequency is 1/s or s^-1