Machine Technology Under
Quantum theory -
Documentary
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The 10 weirdest physics facts, from relativity to quantum physics
People who think science is dull are wrong. Here are 10 reasons why.
Physics is weird. There is no denying that. Particles that don’t exist except as probabilities; time that changes according to how fast you’re moving; cats that are both alive and dead until you open a box.
We’ve put together a collection of 10 of the strangest facts we can find, with the kind help of cosmologist and writer
Marcus Chown, author of We
Need To Talk About Kelvin, and an assortment of Twitter users.
The humanities-graduate writer of this piece would like to stress that this is his work, so any glaring factual errors he has included are his own as well. If you spot any, feel free to
point them out in the comment box below.
Equally, if you feel we’ve missed any of your favourite physics weirdnesses off the list, do tell us that as well
.
If the Sun were made of bananas, it would be just as hot
The Sun is hot, as the more astute of you will have noticed. It is hot because its enormous weight – about a billion billion billion tons – creates vast gravity, putting its core under colossal pressure. Just as a bicycle pump gets warm when you pump it, the pressure increases the temperature.
Enormous pressure leads to enormous temperature.
If, instead of hydrogen, you got a billion billion billion tons of bananas and hung it in space, it would create just as much pressure, and therefore just as high a temperature. So it would make very little
difference to the heat whether you made the Sun out of hydrogen, or bananas, or patio furniture.
Edit: this might be a little confusing. The heat caused by the internal pressure would be similar to that of our Sun. However, if it's not made of hydrogen, the fusion reaction that keeps it going wouldn't get under way: so a banana Sun would rapidly cool down from its initial heat rather than burning for billions of years.
Thanks to people who pointed this out.
All the matter that makes up the human race could fit in a sugar cube
Atoms are 99.9999999999999 per cent empty space. As
Tom Stoppard put it: "Make a fist, and if your fist is as big as the nucleus of an atom, then the atom is as big as
St Paul's, and if it happens to be a hydrogen atom, then it has a single electron flitting about like a moth in an empty cathedral, now by the dome, now by the altar."
If you forced all the atoms together, removing the space between them, crushing them down so the all those vast empty cathedrals were compressed into the first-sized nuclei, a single teaspoon or sugar cube of the resulting mass would weigh five billion tons; about ten times the weight of all
the humans who are currently alive.
Incidentally, that is exactly what has happened in a neutron star, the super-dense mass left over after a certain kind of supernova.
Read and watch out more on these sources:
Source:
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Source: https://youtu.be/CRAyrFtT0SI
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Machine Technology Under Quantum theory
Machine Technology Under Quantum theory
- published: 05 Aug 2015
- views: 718