2. Why is ice slippery?
Scientists thought that until recently, ice is slippery because the pressure created by stepping on it causes the top layer to melt. However, experiments have shown that this is not the case. So pressure isn’t the reason behind slippery ice.
Currently, the best explanation is that the layer that forms on top of ice is not actually a liquid, but a ‘super solid skin’. This means that the water molecules can stretch without breaking. However, not all scientists agree with this theory.
According to Phys.org, some researchers from Sorbonne University in France were able to demonstrate that the friction on ice generates a really thin layer of water. This water is as viscous as oil and that allows the ice to be slippery.
At temperatures that are below freezing, the watery layer is almost imperceptible for the human eye, because of how thin it is. The same researchers from the lab at the Sorbonne University, determined that the layer of water is thinner than a strand of hair.
3 thoughts on “10 Simple Questions We Have No Answer For”
Let nature take it’s course, natural human immunity is the best cure for it, so stop trying to fix what God has already perfected…
In order to HAVE time you need at least two objects that are not like each other in any manner. In the situation where that does exist movement of one relative to the other is time. We have that situation.
Time does NOT exist. It is a virtual concept created by man to measure how fast something changes. IE distance traveled per hour. And if you thing about time travel is absolutely ridiculous because to travel back in “time” you would have to move every atom in the universe back to its position at that time. Going forward in time is even more difficult because you would have to predict all the random events that would occur in the universe and then move all atoms in the universe to that position. Impossible to that. So time was created by man, a very useful concept but still doesn’t have “existence”.