TellMeWhy

A wonderful and marvelous collection of answers to intriguing questions everyone ask about the world covering almost every subject, from science and history to art, language, mathematics, technology, and homeschooling

July 12, 2017

Hard water is water that contains certain dissolved chemical that act on soap to form a scum. If water comes from limestone areas, some rock

July 11, 2017

Fire extinguishers stop flames either by dousing them in water or by excluding the oxygen which a fire needs in order to burn. There are thr

July 10, 2017

Some metals are chromium-plated to make them look attractive and to prevent them from corroding or rusting. Chromium is a silver-white, hard

July 8, 2017

How far the human eye can see depends on how many particles of light, or photons, a distant object emits. The farthest object visible with t

July 7, 2017

Radar, or radiolocation, as it was called in the early days, is the use of radio waves to find the whereabouts of aircraft or ships. Electro