3 ms·

> he showed that not even two teams of horses straining to rip apart the watermelon-size ball could overcome the suction of nothing. Um. It's not "suction of n

by zvrba 4y ago

> he showed that not even two teams of horses straining to rip apart the watermelon-size ball could overcome the suction of nothing. Um. It's not "suction of nothing", it's the pressure of the atmosphere. If the vacuum-"filled" ball were put into another vacuumed container, a small child would have no trouble separating the halves.

pixl97 4y ago
If the balls were made of very smoothly polished metal would that be true? https://en.wikipedia.org/wiki/Cold_welding https://en.wikipedia.org/wiki/Cold_welding
- sharpneli 4y ago
  It still wouldn’t be the suction of nothing. It would be the usual metallic bonds keeping them together.
- kurupt213 4y ago
  It would still be true. This isn’t pressure welding copper, and if it was, the horses could pull that apart
MisterTea 4y ago
> If the vacuum-"filled" ball were put into another vacuumed container, a small child would have no trouble separating the halves. Hell, they would likely come apart on their own due to a low pressure differential and gravity pulling at them.
- inphovore 4y ago
  Not true! Cold welding https://en.m.wikipedia.org/wiki/Cold_welding https://en.m.wikipedia.org/wiki/Cold_welding
  - MisterTea 4y ago
    At what point did anyone specify the surfaces are highly polished and clean?
treeman79 4y ago
A small child in a vacuum chamber is going to have larger concerns.
andrei_says_ 4y ago
Where can I see good explanations of these terms?