![]() ![]() So the second time they asked me, I looked for ways to make my job easier. A gallon of tap water at that temperature was a lot for me to carry. I was a kid back then and weighed only 70 pounds. Then they asked me to return home, get a gallon of water and bring it to them to quench their thirst. It was a hot summer day, and they went up this nearby hill to bury their collection of bottle caps. There was a time in my life when I could use this concept of water density to get back at my older brother and his friends for always picking on me. ![]() One example that can be made for this is molten silica. This phenomenon is usually referred to as ‘negative thermal expansion’ and applies to those bonded with intermolecular forces and other chemical composition factors.
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