Convert between units like meters, feet, inches, yards, kilometers and miles. The calculator below can be used to convert between length units:
In chemistry, concentration is the abundance of a constituent divided by the total volume of a mixture. Several types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes and solvents in solutions.
The definition of observational science is a field of science where controlled observations cannot be done in order to study causes and effects. Scientific studies are simply done through the observation of nature taking its course and recording the findings over time. Astronomy.