Question

What happens in the gray zone between solid and liquid? ​​

Answer 1

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• What happens in the gray zone between solid and liquid? 

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• Solids and liquids are well understood. But some materials act like both a liquid and a solid, making their behaviour hard to predict. Sand is one example. A grain of sand is as solid as a rock, but a million grains can flow through a funnel almost like water. And highway traffic can behave in a similar way, flowing freely until it becomes blocked at some bottleneck.

• So a better understanding of this “gray zone” might have important practical applications.

• “People have been asking, under what conditions does the entire system jam up or clog?” says Dr. Kerstin Nordstrom, a physicist at Mount Holyoke College. “What are the crucial parameters to avoid clogging?” Weirdly, an obstruction in the flow of traffic can, under certain conditions, actually reduce traffic jams. “It’s very counter intuitive,” she says.

Answer 2

Answer:

In the grey zone between solid and liquid.

Explanation:

This is based on ideal gas law PV=nRT.

Where P is pressure, V is volume, R is gas constant and T is temperature. Hence from liquid to solid or solid to liquid the transition has to cross the grey zone.

This grey zone transition is is very crucial which includes the inter molecular forces acting on the molecules and each atoms which makes the change in state from hot to cold and cold to hot.

The best example is ice crystal formation and water formation from ice crystal

Hence the inter molecular force of attraction happens to be involved with changes in grey zone.