What Is a Detergent?
What Is a Detergent? A detergent is a substance which has a power to cleanse. This description applies to soap, as well as to shampoos and washing powders. A detergent...
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How Is a Sheet of Paper Made?
How Is a Sheet of Paper Made? A sheet of paper consists of vegetable fibres of different sizes, twisted and intertwined with each other and finally squeezed together to...
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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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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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What Is a Benthic Zone?
What Is a Benthic Zone? The benthic zone refers to freshwater, brackish, and saltwater environments. Depending on the water body, the benthic zone may include areas...
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