Missing: one big, yellow, fiery ball

124

Comments

  • whyamihere
    whyamihere Posts: 7,714
    Ah, no, different thing. Obviously the universe expands in all directions.

    The geometries I was describing are a way of visualising the way that the expansion will continue. For example, the closed universe, the sphere, can have an outer limit for expansion at the surface of the sphere.

    I feel like I'm messing this explanation up a bit, so I'll do it tomorrow when I'm rested. ;)
  • cjcp
    cjcp Posts: 13,345
    whyamihere wrote:
    I feel like I'm messing this explanation up a bit,

    You can sleep easy: there's only one person here who's messing this up. Go to 1:30 onwards - http://www.youtube.com/watch?v=SjxY9rZwNGU
    FCN 2-4.

    "What happens when the hammer goes down, kids?"
    "It stays down, Daddy."
    "Exactly."
  • redvee
    redvee Posts: 11,922
    Shock to the system when I got the milk and paper this morning :shock:
    I've added a signature to prove it is still possible.
  • biondino
    biondino Posts: 5,990
    I could swear boffins have managed to exceed the speed of light - using quantum tunnelling perhaps?

    I was always tickled in physics lessons by the fact that when you jump, not only do you move back towards the earth as gravity takes effect but the earth moves towards you as well. Made me feel very powerful, that.
    My Focus / My Bob Jackson
    Blog (incl. bikes)
  • always_tyred
    always_tyred Posts: 4,965
    biondino wrote:
    I could swear boffins have managed to exceed the speed of light - using quantum tunnelling perhaps?
    Yup. They've managed to send information a very short distance by tunneling, fast than the speed of light.
  • jonginge
    jonginge Posts: 5,945
    biondino wrote:
    I could swear boffins have managed to exceed the speed of light - using quantum tunnelling perhaps?
    There's a quantum coherence thing where information 'appears' to travel faster than light: Bell's theorem
    http://en.wikipedia.org/wiki/Bell%27s_Theorem
    FCN 2-4 "Shut up legs", Jens Voigt
    Planet-x Scott
    Rides
  • whyamihere
    whyamihere Posts: 7,714
    biondino wrote:
    I could swear boffins have managed to exceed the speed of light - using quantum tunnelling perhaps?

    I was always tickled in physics lessons by the fact that when you jump, not only do you move back towards the earth as gravity takes effect but the earth moves towards you as well. Made me feel very powerful, that.
    Not only that, but a tiny amount of what makes you move away from the ground when you jump is you pushing the Earth down.
  • shoulder_of_orion
    shoulder_of_orion Posts: 529
    whyamihere wrote:
    biondino wrote:
    I could swear boffins have managed to exceed the speed of light - using quantum tunnelling perhaps?

    I was always tickled in physics lessons by the fact that when you jump, not only do you move back towards the earth as gravity takes effect but the earth moves towards you as well. Made me feel very powerful, that.
    Not only that, but a tiny amount of what makes you move away from the ground when you jump is you pushing the Earth down.

    Is it true then that if all the Chinese jumped up simultaneously that there would be a cataclysm i.e earthquakes, tsunami etc ending life as we know it??
  • Sewinman
    Sewinman Posts: 2,131
    Woooosh! :oops:

    I love lamp, I love desk.
  • roger_merriman
    roger_merriman Posts: 6,165
    one of the lovely things is gravity is remarkably weak yet seem to be one of the most imporant forces.
  • always_tyred
    always_tyred Posts: 4,965
    roger merriman wrote:
    one of the lovely things is gravity is remarkably weak yet seem to be one of the most imporant forces.
    Things would be seriously odd if we dispensed with any one of them.

    With the possible exception of the police.
  • il_principe
    il_principe Posts: 9,155
    cjcp wrote:
    Greg66 wrote:
    fecal relatively

    His what? :P

    Yeah, his what?
  • Beeblebrox
    Beeblebrox Posts: 145
    If we're on the subject of scientific correctness, the Sun ain't firey.
  • jonginge
    jonginge Posts: 5,945
    Spooky:
    http://news.bbc.co.uk/1/hi/sci/tech/8081058.stm
    FCN 2-4 "Shut up legs", Jens Voigt
    Planet-x Scott
    Rides
  • Big Wib
    Big Wib Posts: 363
    whyamihere wrote:

    There are 3 possibilities for the geometry of the universe: Closed, open and flat. In terms of the curvature of space time, the closed universe resembles a sphere, the open one resembles a horse riding saddle and the flat one is, well, flat.

    i preferred that brief period when the universe was being described as Pringle shaped before it became saddle shaped.
  • always_tyred
    always_tyred Posts: 4,965
    Beeblebrox wrote:
    If we're on the subject of scientific correctness, the Sun ain't firey.
    How do you you figure?
    I would draw your attention to the copious volumes of plasma associated with the sun.
    If you are talking about the newspaper, I would recommend solving the problem by setting fire to it.
  • lost_in_thought
    lost_in_thought Posts: 10,563
    Sewinman wrote:
    Woooosh! :oops:

    I love lamp, I love desk.

    I killed a guy with a trident.
    FCN 7/1
    Viner Maxima, Tifosi CK7, Giant Bowery, Old commuter.
  • cjcp
    cjcp Posts: 13,345
    It's back. Oh yeah, baby. 8)
    FCN 2-4.

    "What happens when the hammer goes down, kids?"
    "It stays down, Daddy."
    "Exactly."
  • DonDaddyD
    DonDaddyD Posts: 12,689
    I'm torn between liking it and hating it.

    Sure its lovely to have hot weather but there is something unnatural about heat, the hot weather, in England. Its a swealtering - beat you down in the ground - drain your energy and will to live - type of heat.

    Don't get me wrong I love hot weather, I really do, but there is a distinct difference to the hot weather in a tropical country, Carribean or some such exotic place and the heat experienced in England (well London).

    I think its got to do with the humidity or composition of the air i.e. pollution. Hell I think I'd enjoy Sunday more if i was outside of London instead of stuck in the City....
    Food Chain number = 4

    A true scalp is not only overtaking someone but leaving them stopped at a set of lights. As you, who have clearly beaten the lights, pummels nothing but the open air ahead. ~ 'DondaddyD'. Player of the Unspoken Game
  • roger_merriman
    roger_merriman Posts: 6,165
    DonDaddyD wrote:
    I'm torn between liking it and hating it.

    Sure its lovely to have hot weather but there is something unnatural about heat, the hot weather, in England. Its a swealtering - beat you down in the ground - drain your energy and will to live - type of heat.

    Don't get me wrong I love hot weather, I really do, but there is a distinct difference to the hot weather in a tropical country, Carribean or some such exotic place and the heat experienced in England (well London).

    I think its got to do with the humidity or composition of the air i.e. pollution. Hell I think I'd enjoy Sunday more if i was outside of London instead of stuck in the City....

    it's a lot more bearable on the coast or well out of london, heat in cities is horrid. it's a lot fresher around my folks places, really lovely in my folks place as those big stone walls stay nice and cool...
  • greg66_tri_v2.0
    greg66_tri_v2.0 Posts: 7,172
    In the city, I suspect the unpleasantness is amplified by @ssholes like me, who use a machine that takes hot air, and splits it into cold dry air (which gets pumped around my room ) and hot wet air (which gets pumped outside).

    I remember being in NYC one summer and walking past a succession of shops and buildings with their a/c going full blast. It was like being hit with a jetstream from a sauna, on a hot day.
    Swim. Bike. Run. Yeah. That's what I used to do.

    Bike 1
    Bike 2-A
  • lost_in_thought
    lost_in_thought Posts: 10,563
    DonDaddyD wrote:
    I'm torn between liking it and hating it.

    Sure its lovely to have hot weather but there is something unnatural about heat, the hot weather, in England. Its a swealtering - beat you down in the ground - drain your energy and will to live - type of heat.

    Don't get me wrong I love hot weather, I really do, but there is a distinct difference to the hot weather in a tropical country, Carribean or some such exotic place and the heat experienced in England (well London).

    I think its got to do with the humidity or composition of the air i.e. pollution. Hell I think I'd enjoy Sunday more if i was outside of London instead of stuck in the City....

    I reckon it has a lot to do with work.

    I don't like my job at the best of times, but this is made all the worse by glorious weather. That's one reason why heat in cities is worse.

    Another one is the distance from water. On a hot day, I reckon the best place to be is near or in water. The air's nicer, it's cooler (possibly psychomological) and if it's clean and appropriate, you can swim in it and cool off. There's not enough water in cities.

    Oh, but I am going rowing this evening. :D
    FCN 7/1
    Viner Maxima, Tifosi CK7, Giant Bowery, Old commuter.
  • roger_merriman
    roger_merriman Posts: 6,165
    lost_in_thought wrote:
    DonDaddyD wrote:
    I'm torn between liking it and hating it.

    Sure its lovely to have hot weather but there is something unnatural about heat, the hot weather, in England. Its a swealtering - beat you down in the ground - drain your energy and will to live - type of heat.

    Don't get me wrong I love hot weather, I really do, but there is a distinct difference to the hot weather in a tropical country, Carribean or some such exotic place and the heat experienced in England (well London).

    I think its got to do with the humidity or composition of the air i.e. pollution. Hell I think I'd enjoy Sunday more if i was outside of London instead of stuck in the City....

    I reckon it has a lot to do with work.

    I don't like my job at the best of times, but this is made all the worse by glorious weather. That's one reason why heat in cities is worse.

    Another one is the distance from water. On a hot day, I reckon the best place to be is near or in water. The air's nicer, it's cooler (possibly psychomological) and if it's clean and appropriate, you can swim in it and cool off. There's not enough water in cities.

    Oh, but I am going rowing this evening. :D

    there is ruddy great river mind you ;-)
  • lost_in_thought
    lost_in_thought Posts: 10,563
    roger merriman wrote:
    lost_in_thought wrote:
    DonDaddyD wrote:
    I'm torn between liking it and hating it.

    Sure its lovely to have hot weather but there is something unnatural about heat, the hot weather, in England. Its a swealtering - beat you down in the ground - drain your energy and will to live - type of heat.

    Don't get me wrong I love hot weather, I really do, but there is a distinct difference to the hot weather in a tropical country, Carribean or some such exotic place and the heat experienced in England (well London).

    I think its got to do with the humidity or composition of the air i.e. pollution. Hell I think I'd enjoy Sunday more if i was outside of London instead of stuck in the City....

    I reckon it has a lot to do with work.

    I don't like my job at the best of times, but this is made all the worse by glorious weather. That's one reason why heat in cities is worse.

    Another one is the distance from water. On a hot day, I reckon the best place to be is near or in water. The air's nicer, it's cooler (possibly psychomological) and if it's clean and appropriate, you can swim in it and cool off. There's not enough water in cities.

    Oh, but I am going rowing this evening. :D

    there is ruddy great river mind you ;-)

    I had spotted that. It's hard to row without one.
    FCN 7/1
    Viner Maxima, Tifosi CK7, Giant Bowery, Old commuter.
  • jedster
    jedster Posts: 1,717
    too true on the aircon front

    Also, all the stone, brick, tarmac, concrete acts as a big heat store - heats up in the day and gives it all back in the night keeping conditions uncomfortably warm at night.

    BTW - wasn't it warm this morning? I was wearing bibshorts, baggies and a merino t shirt* and I was hot before I got on the bloody bike. When I got to the station I must have looked like I'd just been swimming.

    * yes, I realise that there are cooler fabrics than merino but I haven't found one that won't hum unpleasantly on the train on the way home...
  • DonDaddyD
    DonDaddyD Posts: 12,689
    lost_in_thought wrote:
    Another one is the distance from water. On a hot day, I reckon the best place to be is near or in water The air's nicer, it's cooler (possibly psychomological) .

    Presumably the evaporating/evaporated water molecules make the air fresher/easier to breath.

    I don't understand the complete science of it... I'm only a fizzycist... but I'm sure science is invovled in this somewhere....
    Food Chain number = 4

    A true scalp is not only overtaking someone but leaving them stopped at a set of lights. As you, who have clearly beaten the lights, pummels nothing but the open air ahead. ~ 'DondaddyD'. Player of the Unspoken Game
  • Cafewanda
    Cafewanda Posts: 2,788
    I'll take the sun/heat any way I can get it in London, coz it doesn't last long enough for me 8) .

    Must remember to drink plenty of fluids for the homeward journey.
  • jedster
    jedster Posts: 1,717
    On a hot day, I reckon the best place to be is near or in water. The air's nicer, it's cooler (possibly psychomological) and if it's clean and appropriate, you can swim in it and cool off.

    Ah but it's also generally more humid. And in my experince it's the humidity that really gets obnoxious (one of the reasons that 30C feels hotter in UK than in some other places).

    I dd a few months work in Saudi a few years ago. Riyadh (middle of the desert) got up to 50C but zero humidity - you basically got dessicated walking anywhere outdoors. However the 42c and high humidity on the Red Sea coast was much more difficult to deal with.

    Close to water is great provided you can strip off and go for a swim. Not so much help when you're supposed to be working...

    I reckon the best place to be when it's hot is the hills. But then I generally think that's the best place to be regardless.

    J

    J
  • lost_in_thought
    lost_in_thought Posts: 10,563
    DonDaddyD wrote:
    lost_in_thought wrote:
    Another one is the distance from water. On a hot day, I reckon the best place to be is near or in water The air's nicer, it's cooler (possibly psychomological) .

    Presumably the evaporating/evaporated water molecules make the air fresher/easier to breath.

    I don't understand the complete science of it... I'm only a fizzycist... but I'm sure science is invovled in this somewhere....

    I HAVE A DEGREE IN PHYSICS. I GOT IT FROM GOOGLE. :lol:
    FCN 7/1
    Viner Maxima, Tifosi CK7, Giant Bowery, Old commuter.
  • gert_lush
    gert_lush Posts: 634
    It was absolutely hooning it down with rain here on the commure this morning, there were 3ft wide rivers going down the side of the road! it also reminded me how useless my brakes are downhill in the wet and how much i really should change the pads soon!:shock: :shock: :shock: seems to have cleared the air a bit though which is good :D
    FCN 8 mainly
    FCN 4 sometimes

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