8
votes
4answers
1k views

What happens when we cut objects?

What is the role of the molecular bonds in the process of cutting something? What the one of the Pauli exclusion principle, responsible for the "hardness" of matter? Moreover, is all the energy ...
5
votes
1answer
974 views

Hit a bottle of beer on the top with another causes the first to spit all the gas, why?

So, on the other day me and my colleges were discussing the following phenomena: Pick two open bottles of beer. With the bottom of the first, hit the second on the bottleneck, in the following way: ...
7
votes
2answers
1k views

How can rising bubbles shrink and disappear?

I was recently looking at a Wurlitzer juke box, and noticed something strange. It's decorated with liquid-filled tubes. Gas bubbles are injected at the bottoms of the tubes, and the bubbles naturally ...