Learn what a derived unit is in chemistry and physics, get examples, see a list of metric or SI derived units of measurement.| Science Notes and Projects
A mole is a SI base unit of measurement. This is a definition of unit, its value, and example problems using the mole in chemistry.| Science Notes and Projects
The ladder method is an easy way of converting metric units using simple conversion factors. Here's how it works.| Science Notes and Projects
Learn what an exact number is in chemistry, physics, and math. Get the definition and examples of exact numbers.| Science Notes and Projects
Get the definition of STP in chemistry and learn the values of standard temperature and pressure and when you use them.| Science Notes and Projects
Learn what Planck's constant is and why it is important in quantum mechanics. Get the definition and value of h.| Science Notes and Projects
Learn about momentum in physics. Get its definition, units, formula, and worked example problems. See how it relates to Newton's laws.| Science Notes and Projects
Learn about the astronomical unit (au or AU) in astronomy. Get the definition, example distances, history, and worked problems.| Science Notes and Projects
Get the viscosity definition and examples. Learn about the viscosity of water and how it's calculated in science.| Science Notes and Projects
Get the mass definition in science. Learn what mass is, how it differs from weight, and how it applies to scientific laws and formulas.| Science Notes and Projects
Get the definition of a light year in astronomy. See examples of distances in light years and how the unit compares with parsecs and AU.| Science Notes and Projects