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A do-it-yourself project like removing the rust from metal chairs, before the primer and paint stages, requires you to take precautions against inhaling the dust when grinding or sanding the metal. While limited exposure to rust dust is not harmful…
A pulley is a simple machine designed to increase lift strength using a tracked wheel and a cord, rope or chain. These useful devices are applied often in modern-day machinery, with numerous examples of pulleys found in your community. Look…
Sir Isaac Newton’s second law of motion states that the force exerted by a moving object is equal to its mass times its acceleration in the direction from which it is pushed, stated as the formula F=ma. Because force is…
Covalent bonds are chemical bonds in which two or more elements join together by sharing electrons, rather than transferring electrons, as is the case with ionic bonds. These bonds tend to occur with nonmetal elements of the periodic table. Water…
Math percentage problems can often be confusing since they can have many variations. Whether you need to find the percentage of a number or what percentage a number is of another, each type of problem fortunately follows a set formula…
When an electrical generator incurs losses, its efficiency drops from 100 percent. The efficiency of a generator is determined by the power of the load circuit and the total watts produced by the generator. It is expressed as a percentage…
Plants are amazing life forms. They create energy from sunlight, feed countless animals, and can grow and thrive under almost any conditions on earth. Certain plants have even evolved to live underwater, in the world’s oceans. Over millions of years,…
Found in locations ranging from the Carolinas to Alaska and all around the world, coniferous forests are much more desolate places than are temperate or tropical forests. Despite their relatively low productivity, or perhaps because of it, many animals have…
How fast a bullet is traveling when it leaves the end of a gun’s barrel, called the muzzle velocity, is of great interest to both those who work in the field of ballistics and physics students looking to cover a…
Horses have been raced competitively for centuries, and horse racing events remain a popular part of human culture. There are five main gaits, or ways in which a horse can move; these are called walking, trotting, cantering, galloping and backing.…
