Gravity and Dark Energy physics

Discussion in 'Bad Dog Cafe' started by ASATKat, Aug 31, 2019.

  1. RodeoTex

    RodeoTex Poster Extraordinaire

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    Your neice is cool @Blue Bill .
    Don't understand half what she is saying, but she's cool.
    I hope she's a teacher.
     
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  2. Obsessed

    Obsessed Telefied Ad Free Member

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    Gravity and dark energy are two entirely different things. With regards to the oil/water issue. Water molecules are heavier than oil molecules, so the oil sits on top of the water.

    Dark energy is something throughout the universe, but we are not certain what it is, but only know that it occupies lots of volume.
     
    Last edited: Sep 1, 2019
  3. MrCairo46

    MrCairo46 Friend of Leo's

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    But what about dark energy and it’s impact on tone?
     
  4. PlainAllman

    PlainAllman Tele-Holic

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    I was a wildland firefighter and Engine Operator in California for many years. I attended the Engine Academy as part of my annual training and we had a class taught on pump theory. Part of the class addressed the theory behind how a pump was used to draft water from a source to utilize for firefighting. The theory was that the pump didn’t “suck” the water up like most people would view it. Rather the pump created a low pressure inside its center and therefore the outside air pressure “pushed” the water into the pump. I realize that isn’t necessarily related to dark matter but it demonstrates to me there are forces that work the opposite of, if not unlike gravity, that are not always so apparent.
     
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  5. Greggorios

    Greggorios Friend of Leo's

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    Cool niece! Must make family gatherings something to look forward to! I could listen to this stuff for days...fascinating. I LOVE hearing younger folks getting into this stuff...
     
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  6. RottenTheCat

    RottenTheCat Tele-Holic

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    Gentleman, it's Sunday morning. I had an interaction with dark energy already, resulting in the deposition of some dark matter. Happens every Sunday like clockwork!
     
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  7. raito

    raito Poster Extraordinaire

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    Physics Girl has been one of my 10 year old daughter's favorites for several years.
     
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  8. Blue Bill

    Blue Bill Poster Extraordinaire

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    She's great, we're so proud of her. She also plays concert level classical piano and sings like a bird.
     
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  9. JL_LI

    JL_LI Friend of Leo's

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    I hope this doesn't add to your confusion. Jamie Farnes is an Oxford theoretical physicist who has come up with the first theory to seamlessly integrate dark matter, dark energy, and gravity. This link takes you to a relatively straightforward science news article describing how negative mass interacts with normal mass.
    http://theconversation.com/bizarre-...the-universe-what-my-research-suggests-107922

    Anyone with a little physics under their belt may want to download the complete paper from
    https://arxiv.org/pdf/1712.07962.pdf
    This link takes you to the paper. It is exceptionally well written and pretty easy for a non-physicist to follow. Those unfamiliar with the math can ignore the equations and read past them. What they mean is clearly explained. And the math doesn't go beyond what most physics and engineering majors are exposed to until the appendix where it rises from my comfort zone.

    So far as your oil and water question, what you're seeing is two immiscible liquids of different densities. The density of water is 1g/ml. Oils are typically in the range of 0.8g/ml to 0.9g/ml. The less dense of two immiscible liquids will always float on top of the denser liquid in a container. There's no need to make it more complicated than it needs to be.
     
  10. doc w

    doc w Tele-Afflicted

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    Gravity is in the fingers.
     
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