Science stories of the week

Discussion in 'General Science & Technology' started by wegs, Jan 31, 2021.

  1. Michael 345 New year. PRESENT is 72 years oldl Valued Senior Member

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    Funny ha ha although it infrequently happened when I was nursing

    Apparently in today's addicted to "a pill for everything people" doctors are wary about giving out sleeping medication

    This is me in my after shower relaxing position

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    I put the pillows at foot of bed
    Bring head of bed almost vertical and lay back

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    Freaks nurses out

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    Last edited: Jun 25, 2022
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  3. wegs Matter and Pixie Dust Valued Senior Member

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    Last edited: Jun 25, 2022
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  5. Michael 345 New year. PRESENT is 72 years oldl Valued Senior Member

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  7. Michael 345 New year. PRESENT is 72 years oldl Valued Senior Member

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    Last nights weird dream

    Was in a dilapidated house seemingly paying rent to share a room with 3 other males

    In the room we were assigned were 4 mattresses with sheets and blankets

    Nothing else. I did check another room

    Nothing in the room except a unusual feature built into a wall. About knee high was a recessed male urinal. I had passed a toilet on the way to this other room so only guessing this was for a person who was to lazy to use the toilet in the hallway

    The other part involved another character and myself after another character

    We boxed in his car, one other side in our cars, all cars res, but he accelerated and left long scratches in all 3 cars

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  8. Michael 345 New year. PRESENT is 72 years oldl Valued Senior Member

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    Dream of the moment was a afternoon dream

    I was piloting one of those back pack helicopters. There was a whole fleet of fixed wing overhead

    In the water were a few craft making their way to a person floating vertical due to the life vest he was wearing

    I went down to water surface level came up behind the floater put my feet under his armpits and lifted him a little higher in the water and towed him to the nearest boat

    Not very exciting but I wonder where it came from

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  9. wegs Matter and Pixie Dust Valued Senior Member

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    My outside a/c unit was in need of repair this summer. I noticed that when it was shut down for a few hours, the temp in the house increased five degrees in a short amount of time, like maybe less than two hours? When the a/c was repaired, it took three hours to bring the temp on the digital panel back down five degrees.

    https://www.wired.com/story/temperature-is-weirder-than-you-think/

    What’s kind of weird, if you think about it, is that going one way is much harder than going the other way. Making stuff warm isn’t a problem. Just about anything you do will cause something to increase in temperature, even if you don’t want it to. But making stuff cold is trickier.

    I should know this, but when your a/c is malfunctioning, you lose all common sense.

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  10. Seattle Valued Senior Member

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    When you live in Florida. When you live in Seattle...it's just another day.

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    Regarding your house, the sun is heating up your house and the a/c is cooling it off. Which is more powerful, the sun or your a/c?

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    I think the energy required to cool something off is less than the energy required to heat something. If I'm wrong, I'm sure that will soon be pointed out...

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  11. wegs Matter and Pixie Dust Valued Senior Member

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    If you live in a colder climate trying to heat your home during the dead of winter (as compared to cooling your home during the summer), that would be true but if you live in a warm climate, it takes less time for the inside of your home to heat up (the a/c simply being off on a 90 degree F day), as opposed to the time it takes to cool it back down. The article explains.

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  12. Michael 345 New year. PRESENT is 72 years oldl Valued Senior Member

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    Think it would be incorrect

    Insert something about the conservation of energy here

    The air-conditioning is only cooling, (mainly the air in the room) when it starts up

    Gradually the inner walls cool but fighting against the inner walls cooling are the already heated outer walls

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  13. Seattle Valued Senior Member

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    Entropy results in cooling naturally doesn't it?
     
    Last edited: Jul 4, 2022
  14. DaveC426913 Valued Senior Member

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    Keep a few things in mind:
    1] any heating or cooling measurements are relative to ambient air temp.
    2] the sun heats by radiation, which does not depend on ambient air temp.
     
  15. Michael 345 New year. PRESENT is 72 years oldl Valued Senior Member

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    We are not talking just entropy though

    In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time

    Wikipedia

    The Universe is a isolated system with pockets of high and low energy but within its isolated state no energy can be added or removed - just temporarily moved around ie we cook the room down we must heat up another part of the Universe by an equivalent amount

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  16. exchemist Valued Senior Member

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    Increase in entropy involves the spreading out of heat energy, which implies cooling of hotter parts and warming of cooler ones.

    What an AC unit or a fridge does is to oppose this tendency by pumping heat, artificially, against the temperature gradient. This requires the input of mechanical work, usually supplied electrically.

    The heat output from the hot side is the sum of the heat extracted from the cold side plus the input mechanical work energy.
     
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  17. geordief Valued Senior Member

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    Back to the dreams,I assume that every character in the dream is myself.

    Is that a commonly held idea ,or just me?

    (So you would also be the person in the water ,even if less -or perhaps more consequentially.The dream doesn't make narrative sense for that ,amongst other reasons)
     
  18. DaveC426913 Valued Senior Member

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    That is a theory proposed by some dream psychologists, yes. I think it may have some validity.
     
  19. wegs Matter and Pixie Dust Valued Senior Member

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    Yea, I believe that’s common as well as “seeing” familiar people you know, family or friends, etc…but in my dreams, they’re either attractive or unattractive “versions” of people I know. Apparently, I’m quite shallow in my dreams. ~ lol
     
  20. Michael 345 New year. PRESENT is 72 years oldl Valued Senior Member

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    Back later
     
  21. geordief Valued Senior Member

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    I wonder if it is a related question as to whether we can be considered, to a degree as the "author" of the depictions in our dreams or whether the dreams are merely some kind of a chaotic regurgitating of our conscious thought processes over the preceding periods.

    If our sense of self has any kind of input into the dreams then it might insert itself into any one of the salient depictions that crop up.

    Actually ,I think I carry that idea over into my waking consciousness and imagine I imbue all the people I have close or distant dealings with with a little of my own identity

    I colonize their psychic space ,as ut were.
     
  22. wegs Matter and Pixie Dust Valued Senior Member

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    When my a/c was shut off for several hours, the house temp increased much quicker (five degrees in less than two hours) and when it was repaired and began working properly again, it took three+ hours to cool it down five degrees. So, it takes longer to cool something, than to heat something up. It would take far less time to boil one cup of water than to freeze it, for example. I don’t know why I find this so strange.
     
  23. geordief Valued Senior Member

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    Did you write that wrong?
    You didn't mean to write "Didn't seem like I was anyone else but the back pack helicopter pilot" did you?

    Maybe we can only be one character at a time but this could shift around during the same dream.

    I wonder if we have different levels of consciousness in dreams.


    You know,can dreams have their own unconscious?(like Russian dolls)

    Best dreams I had was coming round from general anaesthetic (have forgotten them of course)
     

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