Feynman why is ice slippery

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Its very useful if every one should follow this. Technically very well above you said. Post a Comment. January 29, Credit: author, Tamela Maciel Even without a layer of salt, you may have noticed that snow disappears from pavement long before it melts from the grass or leaves.

Why is this? The pavement is in direct contact with the earth, which, unless you've had a deep freeze for a long time, is probably much warmer than the air temperature. This is because the ground takes a long time to adjust to sudden changes in temperature.

The warmer ground continuously heats the roads and sidewalks through direct transfer of heat, or thermal conduction , and causes the snow to melt. But the grass, leaves, tree branches, and even bridges are separated from the ground by a layer of air. Air is an excellent insulator and prevents heat transfer from the ground. This keeps the grass and other elevated surfaces frozen and snowy for much longer, and creates a lovely winter wonderland long after the snow has stopped.

Labels Feynman ice salt water snow thermodynamics and heat weather winter. Labels: Feynman ice salt water snow thermodynamics and heat weather winter. Evita Kiley March 13, at AM. Unknown March 13, at AM. Sachin March 13, at AM. John Joeban March 13, at AM. Steve March 13, at AM. Gautham March 13, at AM. Jambari Juma March 13, at AM. George jakzin March 13, at AM. Mohamed alex March 13, at AM. Thirsha March 13, at AM. Zhara Timothy March 13, at AM. Mohamed March 13, at AM.

Jammy Ray March 13, at AM. Moha March 13, at AM. Aarthi arun March 13, at AM. Evita Kiley March 16, at AM. Interviewer: If you get hold of two magnets, and you push them, you can feel this pushing between them. Turn them around the other way, and they slam together. Now, what is it, the feeling between those two magnets? Listen to my question. Of course, you feel it. Now, what do you want to know? What does that mean, or why are they doing that, or how are they doing that?

But the problem, you see, when you ask why something happens, how does a person answer why something happens? For example, Aunt Minnie is in the hospital. Because she went out, slipped on the ice, and broke her hip.

That satisfies people. How do you get to the hospital when the hip is broken? Well, because her husband, seeing that her hip was broken, called the hospital up and sent somebody to get her. All that is understood by people. And when you explain a why, you have to be in some framework that you allow something to be true. Why did the husband call up the hospital? And you begin to get a very interesting understanding of the world and all its complications.

If you try to follow anything up, you go deeper and deeper in various directions. Everybody knows that, no problem.