When Was the Hydrofoil Invented?
When Was the Hydrofoil Invented? The hydrofoil, a boat supported clear of the water by underwater wings called hydrofoils, was invented by an Italian, Enrico...
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Who Invented the Jet Engine?
Who Invented the Jet Engine? The first flight by a jet-propelled aircraft was made in Germany on august 27, 1939. Its engine was designed by Hans-Joachim von Ohain, who...
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Where Was Morse Code First Used?
Where Was Morse Code First Used? The first message in Morse code was tapped out in the United States over a telegraph line from Baltimore to Washington by Samuel F. B....
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What Are Gamma Rays?
What Are Gamma Rays? Gamma rays are streams of electromagnetic waves. They are given off from elements such as radium, when they undergo a process known as radioactive...
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Why Is Pollution a Problem?
Why Is Pollution a Problem? Pollution is a problem because man, in an increasingly populated and industrialized world, is upsetting the environment in which he lives....
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When Does an Atom Split?
When Does an Atom Split? An atom splits when it is struck by a neutron. The nucleus of the atom then breaks into two roughly equal parts and, at the same time, shoots...
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What Is Hard Water and How Can It Be Treated?
What Is Hard Water and How Can It Be Treated? Hard water is water that contains certain dissolved chemical that act on soap to form a scum. If water comes from...
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How Do Fire Extinguishers Work?
How Do Fire Extinguishers Work? 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...
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Why Are Some Metals Chromium Plated?
Why Are Some Metals Chromium Plated? Some metals are chromium-plated to make them look attractive and to prevent them from corroding or rusting. Chromium is a...
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How Far Can You See?
How Far Can You See? 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 the...
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