How Does a Refrigerator Work?
How Does a Refrigerator Work? Earlier food was preserved by traditional methods like salting and pickling which were not always practical. Nowadays refrigerators are...
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Where Does Natural Gas Come From?
Natural gas is believed to be formed from the remains of ancient plants that lived in the shallow seas that once covered much of the earth. Many layers of the decayed...
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How Does a Fire Extinguisher Work?
How Does a Fire Extinguisher Work? Most fire extinguishers smother a fire by shutting off the supply of air with certain chemicals. The carbon dioxide extinguisher...
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Why Do Drops of Moisture Form on a Cold Glass?
Why Do Drops of Moisture Form on a Cold Glass? The beads of moisture that form on a glass of ice-cold water on a warm day have nothing to do with the liquid inside the...
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What Is Humidity?
Humidity is the amount of moisture, or water vapor (water in the form of a gas) in the air around us. There is always some water vapor in the air. It evaporates from...
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