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All oscillating motions – the movement of a guitar string, a rod vibrating after being struck, or the bouncing of a weight on a spring – have a natural frequency. The basic situation for calculation involves a mass on a…
Deserts are some of the most inhospitable places on earth. They are very dry, have very poor soil, and can experience wildly varying temperature extremes. The Atacama desert in the Andes mountains of South America is so dry it experiences…
Molarity and density are different ways of expressing essentially the same thing. Whereas density is the mass of a solid, liquid or gas divided by its volume, molarity is the number of moles of solute per liter of solution. A…
Calculating the average age of a group tells you what age most of the people fall closest to. This statistic has applications for several different fields. For example, you could calculate the average age of a team to see if…
Backyard birdwatching entertains an estimated 65 million people in the U.S. With more than 900 confirmed species in North America north of Mexico, there are plenty of birds to watch. Some experts estimate there actually may be more than 2,200…
Calcium chloride is a water-soluble ionic compound; its chemical formula is CaCl2. It’s highly hygroscopic, meaning that it readily absorbs moisture from its environment, so it’s sometimes used as a desiccant or drying agent. Its leading use, however, is as…
Engineers make solenoids – electromagnets – by twisting lengths of metal in a spiral fashion around a cylindrical template. You can determine the magnitude of that force by plugging the dimensions and other properties of the magnet based into a…
Atomic mass units (AMU) and moles are two ways of measuring an atom or other particle. AMU is essentially a measurement of the weight of a single proton or neutron. A mole, on the other hand, is a very specific…
For builders, architects and engineers, length and width conversion is critical to doing a good job. A mistake in one of these fields can lead to serious injury. Students must have a firm understanding of them as well. In particular,…
Isopropyl alcohol, also known as isopropanol, is a colorless, flammable organic compound with the molecular formula C3H8O. This liquid substance has a characteristic alcohol-like odor and mixes well with most solvents, including water. Isopropyl alcohol is relatively nontoxic and is…
