Recent comments in /f/explainlikeimfive

WeDriftEternal t1_jaafnxj wrote

It is the same time everywhere.

We just make up what time it is to make our lives easier. There is no particular reason that we need to use any specific time anywhere or all can't be on the same exact clock everywhere. We choose to do it because it can be useful.

Lets say we all agree that noon is when the sun is highest in the sky. No matter where you are, when the sun is highest, its noon. Of course noon in New York, is gonna be hours behind noon in London. This is how it works now, more or less.

But what if we didn't care where you were on earth?. What if noon was when the sun was highest in London, and everyone else used London time. For New York, the sun will be lower. But it would still be noon

Does any of it matter? Does it matter that the sun is lower in New York and its noon? Couldn't people in new york just say start their day at 1pm instead of 8am, then go to bed at like 3am?

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ToasterPops t1_jaafamc wrote

When the speed of communication was faster than the rotation of the earth.

But what really made time zones a thing was trains. Everyone basically used their own local "highnoon" as a time reference and it wasn't working for keeping trains on a schedule

https://www.history.com/this-day-in-history/railroads-create-the-first-time-zones

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Revenge_of_the_User t1_jaafa0m wrote

Its misworded; the issue is that when the agae dies, the decomposition process eats up the oxygen....and as stated somewhere above, causes more stuff to die, causing more decomposition, causing less oxygen and more death......its pretty concerning honestly. There are pockets of no oxygen moving around in the ocean that just suffocate things.

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a4mula t1_jaaeyr8 wrote

Time isn't different. Humans created labels that have been adhered to that's all.

If you left London and sailed to New York at 15 knots. It would take the same amount of time regardless of the standards in use.

That's not to say time is static, Einstein proved its relative, but that's a different consideration and one that has very little bearing on the conversation due to our relatively slow speeds.

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Revenge_of_the_User t1_jaaesjn wrote

The astronaut everyone loves, cant remember his name, demonstrated this not too long ago by being pretty deep below water level where the pressure is just...much greater than on a beach.

He shook a soda pretty vigorously, and then cracked it. Since the pressure was so high down there, the pop only slightly fizzed.

This is also why deep divers have to surface slowly, or spend time in a hyperbaric (pressure) chamber if the need to surface quickly. The nitrogen gas in their blood/tissue expands as they go up, and needs to be done slowly or you get "the bends". Think meat balloon on a cellular level. Can be fatal, or cause life long problems. One guys body swelled up like crazy after an emergency deep dive surfacing (lost his air hose) and survived; though the hyperbaric chamber didnt really help him like it can others - he stayed unfortunately very swollen. But at least he didnt die. The bends are very painful, im told.

All because of gasses in liquids at varying pressures.

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AndOfTheSevenSeass t1_jaacj83 wrote

Pretty inspirational how you didn’t address OP’s question at all but still wrote a 100 word comment that explains nothing about supply chains.

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thebiologyguy84 t1_jaac3z6 wrote

Ok, I teach this to my biology students: Algae are members of the protoctists (essentially organisms that don't quite fit the definition of animal, plant, or fungus). They grow rapidly in fertiliser causing light to be blocked from water plants. They die leaving behind a smorgasbord of food for bacteria and fungi and other decay-eating microorganisms. As they live, like us they need oxygen to perform respiration.....taking oxygen from the water, leading to larger organisms such as fish to die, leading to more bacteria etc etc etc finally causing anoxic water which smells and nothing larger than a cell is alive in it.

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