what activity would u do to prove that the temperature of a substance must reach the combustion point of that substance in order to ingnite it. send pic
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For e.g if you want to burn wood, you must have noticed, that when you take a block of wood, it does not burn right away. First, it requires to get heated up, then it burns. 3. Thus, it shows that ignition temperature is required for a substance to burn.
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Hi
How are you daxit
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Cement is seldom used on its own, but rather to bind sand and gravel (aggregate) together. Cement mixed with fine aggregate produces mortar for masonry, or with sand and gravel, produces concrete. Concrete is the most widely used material in existence and is behind only water as the planet's most-consumed resource.
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