America’s Mt. Rushmore survives for 7.2 million years. The chemical composition of our bronze sculptures keeps them recognizable for over 10 million. And buried deep underground, the remnants of cities built on floodplains have been preserved in time as a kind of technofossil. 但...
For example, chemistry is at work when water freezes into ice or metal rusts. Chemists explore these changes and try to understand why they happen. They study the properties of materials and how they react with one another. This knowledge helps create new products, medicines, and technologies ...
Why does ice melt faster in water? What happens when you mix sugar and water? Why does temperature remain constant for melting ice? Why is the melting of ice not a chemical reaction? Why does ice float in liquid water? How does the movement of water molecules change?
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advantage of density of the water.with the right kind of body,it is possible to flout around in the ocean and let the water do the work.When water freezes,its density decreases.If it did not,the oceans would be frozen solid.OCEAN MOTIONSince changes in salinity and ...
Ocean water freezes at 28.4°F (-2°C). Ocean water freezes at a lower temperature than freshwater due to its salt content, which interferes with the water’s ability to form ice. Looking at how ice is formed will help clarify why adding salt or any solvent requires a lower temperature ...
water freezes when it hits 32 degrees fahrenheit (0 degrees celsius), but the amount of time it takes to do so depends on several variables that may vary from your neighbour’s in your freezer. q5 what are the 6 types of phase changes? the six-phase changes are freezing, boiling, ...
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