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November Forum theme: "Energy"

Discussion in 'Forum Competitions and Themes' started by miked, Nov 1, 2016.

  1. Trannifan

    Trannifan Well-Known Member

    APĀ²001081.jpg

    OK, this is from the depths of the archives (Stuttgart 1985!), but there's a fair bit of energy here, I think.

    Lynn
     
  2. Geren

    Geren Well-Known Member

    16-11-03-thebody-001a.jpg

    No Energy. Someone stayed up all night to watch baseball. Someone was supposed to be an engaged nude model for me the next day. Someone fell asleep on the job.
     
  3. Geren

    Geren Well-Known Member

    I think perhaps I'd better do the updates to my computer because I'm missing a lot of images on here today.

    O Level physics was a long time ago, and while I'm happy to confuse energy/power/potential etc for photographic purposes, would someone mind giving me a quick recap?
     
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  4. Catriona

    Catriona Well-Known Member

    Best precis I've found is: Power is energy per unit of time https://cleantechnica.com/2015/02/02/power-vs-energy-explanation/
    So your sleeping partner (I like that! hehe) is a bundle of energy. He has the capacity for work. When put to that work, he displays power!
     
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  5. Trannifan

    Trannifan Well-Known Member

    Applied/practical energy saving?

    Lynn
     
  6. Geren

    Geren Well-Known Member

    16-11-05-helensburgh-001a.jpg
    Spent energy? Or a waste of energy?
     
  7. Geren

    Geren Well-Known Member

    16-11-05-helensburgh-005a.jpg 16-11-05-helensburgh-006a.jpg
    Bonfire Night Energy
     
    Last edited: Nov 6, 2016
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  8. Catriona

    Catriona Well-Known Member

  9. Petrochemist

    Petrochemist Well-Known Member

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  10. Craig20264

    Craig20264 Well-Known Member

    More wind........oooh err. Not me, the image o_O
    Saxtead-Mill-2-LR.jpg
     
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  11. PI Photography

    PI Photography Well-Known Member

  12. Andrew Flannigan

    Andrew Flannigan Well-Known Member

    Energy in the palm of your hand...

    [​IMG]
     
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  13. MJB

    MJB Well-Known Member

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  14. MJB

    MJB Well-Known Member

  15. Andrew Flannigan

    Andrew Flannigan Well-Known Member

    The absorbtion of energy...

    [​IMG]
     
  16. miked

    miked Well-Known Member

    Just back from a week in the sun. Here's one I brought home with me: (Named in honour of the Bill Evans' composition from the Kind of Blue jazz album, which radiated visceral musical energy.)
    "Blue in Green"

    blueingreen.jpg
     
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  17. Craig20264

    Craig20264 Well-Known Member

    The result of 96 images stacked. Taken on New Years Day morning. Those comets have a fair bit of energy. (It's the green blob in case you're wondering). No specialist gear involved. Nikon D5100, ISO 3200, 35mm prime @f1.8. 7.5 second exposures. Obviously a tripod. Thought I'd better get a shot as this one ain't coming back our way...ever!

    Acturus-LR.jpg
     
    Last edited: Nov 15, 2016
  18. RogerMac

    RogerMac Well-Known Member

    Energy talks........................................but mine just says goodbye

    Meter1.JPG
     
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  19. Craig20264

    Craig20264 Well-Known Member

     
  20. RogerMac

    RogerMac Well-Known Member

    To elaborate a little on Kate's excellent post

    Energy is a total amount and comes in many forms but the total energy of a system always stays the same and can be changed into different forms One example is a spinning flywheel, which contains a lot of energy but is using very little power (air resistance, heat loss in bearings etc.) The energy can be released from the flywheel at a rate that will last for a set length of time . Typically the energy might be written as Kilowatt hours.or horse power (550 foot pounds per second)

    Power is the rate at which energy is used up and typically Kilowatts.

    Energy can appear in many different forms - potential, heat light, sound , chemical as so on - one example is the potential energy stored in a clock
    Clock.JPG


    As shown there is a lot of potential energy in the weights and 1/6,910,200 of this will be released every second (that's the number of seconds in eight days) some will appear as noise (Tick-Tock) and the rest will be used to to drive all those bearings in the clock. Finally all the various energy uses will degrade to heat and (in a tiny way) heat my hall.
     
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