Mind boggling facts that make you go..

Orionaut said:
What happens in the present affects the past. :confused:

https://iheartintelligence.com/quantum-experiment-present-past/
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That article gave me a nosebleed. I just don't have the mindset to be able to understand quantum physics. It amazes me that scientists can study something so obtuse and yet still manage to integrate into society, if I ever suddenly began to understand the theory I fear some kind of metaphysical disassociation leaving me the world's most enlightened root vegetable.
 
FortuitousFluke said:
That article gave me a nosebleed. I just don't have the mindset to be able to understand quantum physics. It amazes me that scientists can study something so obtuse and yet still manage to integrate into society, if I ever suddenly began to understand the theory I fear some kind of metaphysical disassociation leaving me the world's most enlightened root vegetable.
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It's simple. Just spend decades studying it. Understand completely how the present can effect the past. Then help yourself to learn it in the past and you wont ever have to bother with all that studying and you can live your life as normal.
 
Devrij said:
If you could convert your 500g bag of sugar into energy (e=mc^2) you'd get 12,500,000 Mwh of electricity.

For context, you could power 1,136,363 average households for an entire year with that. Or you could power the city of London (all in, not just houses) for about 4 months.

Technically any 500g mass contains that potential energy if you were able to convert it with no loss. Multiply that by double your weight in kilos to find out how much energy you are made of. London could run on me for about 40 years.

So yeah, that one little formula can make for some fun maths that will blow your mind. I chose 500g because it made the maths easier and because it fits with a nice household object, but you can choose and mass and it's generally equally fun. How much energy is contained in the mass of your *******? You do the maths!
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Then they don’t need so many people to run the Matrix. :p
 
Merlin5 said:
There are 10 times more stars in the night sky than grains of sand in all the world's deserts and beaches.
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Actually the sky at night we see is only a narrow viewport and we see several thousand "stars" on a clear night. It's the galaxy itself that contains more stars than granules of sand!
 
the_chicco said:
If you could fold a piece of paper in half exactly 103 times, it would be thicker than the entire observable universe (93 billion light years).

https://www.google.co.uk/amp/s/gizm...lf-103-times-it-will-be-as-thi-1607632639/amp
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I worked it out to 1,014,120,480,182,580,000,000,000,000.0000 Meters or 107,192,619,335.4430 Light years on the 103rd fold. :D

I think they messed up the 90 fold figure, I only got 13,085,036 Light years not 130.8. :) (If I've worked it out correctly)
 
Sasahara said:
I think they messed up the 90 fold figure, I only got 13,085,036 Light years not 130.8. :) (If I've worked it out correctly)
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Your maths is good but your reading is bad.
They said "130.8 million light years" which is the same as your calculation.

edit: actually, it's my reading that's bad! :p I agree with you. Should be 13.08 million?
 
FortuitousFluke said:
That article gave me a nosebleed. I just don't have the mindset to be able to understand quantum physics. It amazes me that scientists can study something so obtuse and yet still manage to integrate into society, if I ever suddenly began to understand the theory I fear some kind of metaphysical disassociation leaving me the world's most enlightened root vegetable.
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Often attributed to Richard Feynman

"If you think you understand quantum mechanics, you don't understand quantum mechanics."
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Sometimes I think I have got it but unfortunately it is only when I am pouring out the last glass of Brandy from the bottle and in the morning I cant remember what it was!

:D
 
aardvark said:
I am :)

And that article is nonsense and written by someone who doesn't understand the original research.

you're welcome ;)
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I have actually seen this refereed to in othermore comprehensiver articles but could not find a quick link.

It does give the idea though.

Particularly with reference to the possibility that the distant galaxy/gravitational lensing experiment might become possible to perform in the not too distant future.
 
aardvark said:
all the air molecules around you are travelling at around 1000mph, and are constantly hitting you at that speed.
Thats why air appears to rush out of an airlock so fast - it doesn't know the door has been opened, its simply the random paths of the air moving out of the room at their usual speed.
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The 2nd part of this is rubbish. Air rushes out of an airlock due to differential pressure.
1st part is questionable also, as molecular air movement is wholly dependent on temperature.
 
Orionaut said:
I have actually seen this refereed to in othermore comprehensiver articles but could not find a quick link.

It does give the idea though.

Particularly with reference to the possibility that the distant galaxy/gravitational lensing experiment might become possible to perform in the not too distant future.
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i guess my main problem is that the cosmic example is surely impossible. You cannot 'peak' at the photon and then let it continue on its journey - to observe (measure) a photon it must be destroyed.

Happy to be proven wrong though!
 
Trappi$t said:
The 2nd part of this is rubbish. Air rushes out of an airlock due to differential pressure.
1st part is questionable also, as molecular air movement is wholly dependent on temperature.
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the movement of the air molecules (and collisions) IS air pressure - what else do you think is causing it?
I was talking about standard room temperature and the 1000mph is approximate.
 
Devrij said:
If you could convert your 500g bag of sugar into energy (e=mc^2) you'd get 12,500,000 Mwh of electricity.

For context, you could power 1,136,363 average households for an entire year with that. Or you could power the city of London (all in, not just houses) for about 4 months.

Technically any 500g mass contains that potential energy if you were able to convert it with no loss. Multiply that by double your weight in kilos to find out how much energy you are made of. London could run on me for about 40 years.

So yeah, that one little formula can make for some fun maths that will blow your mind. I chose 500g because it made the maths easier and because it fits with a nice household object, but you can choose and mass and it's generally equally fun. How much energy is contained in the mass of your *******? You do the maths!
Click to expand...

Well, sugar is about 16 kJ/gram.

500 * 16 kJ = 8 MJ

3600 MJ = 1 MWh

8 MJ/3600 MJ = 0.00222 MWh, therefore it looks like the above is several orders of magnitude out...
 
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