Science

Discussion in 'General Off-Topic Chat' started by zuron7, Dec 9, 2009.

Dec 9, 2009

Science by zuron7 at 3:54 PM (1,277 Views / 0 Likes) 18 replies

  1. zuron7
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    Member zuron7 RBYG

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    Guys I've got this science exhibition in school on 15th

    So I just need a few ideas on what to do.
    They should be working models.
    I've got a few ideas but to see if i get better ones.
     
  2. zuron7
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    Member zuron7 RBYG

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    Help please
     
  3. Crystal the Glaceon

    Member Crystal the Glaceon GBAtemp Inkling™ Squishies~

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    You could make a little robot
     
  4. Hop2089

    Member Hop2089 Cute>Hot

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    ^this

    other science fair ideas

    Volcano, makeshift battery, and rocket (if outside)
     
  5. Veho

    Global Moderator Veho The man who cried "Ni".

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    Illustrate the Coriolis effect.


    Take a large circle cut out of cardboard. Put it on a turntable, so that it rotates. Take a marble dipped in ink. Either start it rolling yourself, or put a tiny guttered ramp on the board (say, one quarter of the radius from the centre) and place the marble on top. Secure it with a peg with a length of string attached. Spin the board, pull on the string to remove the peg, the marble will roll down the ramp and outward. This will show that the marble was rotating along with the board, and that it started off in a straight line towards the edge. Viewed from the outside, the marble will apear to move in a straight line, but the trail it leaves curves. Seen from the point of view of someone on the board (you can put a camera on the board and record the experiment from the rotating reference frame, that's sure to impress), it's as if some weird force is making the marble's trajectory curve to one side.

    Now imagine the board is the Earth viewed from the North Pole, the marble is a cannon ball, an airplane or the wind, and the "force" making their trajectory curve is the Coriolis effect or Coriolis force.

    Remember to mention the "draining sink" myth, and the fact it's only a myth.
     
  6. FAST6191

    Reporter FAST6191 Techromancer

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    Most of my experiments are too dangerous for such an occasion (and you know when I am saying things are too dangerous....).

    I suppose the main thing I wanted to say though was any fool can do a "Volcano, makeshift battery and a rocket" so if you must go with a "classic" then at least try and improve it or show methods by which to improve things).

    On the flip side how about something that I have been playing with for years; find a bunch of household devices (DVD player, music machine, consoles, laptop.......) that run on 240VAC but then pull them apart and show how more than a few run on 12V DC or less (car battery or two in parallel if you want should provide more than enough amps to the damage) when it all comes down to it.
    Add in some nice equations detailing transformer losses (hint: they are nearly all horribly inefficient) and with all the whale hugging going on at the moment you have got yourself an in, you could probably spin a rural areas/power cut sob story in there as well if you wanted.

    Circuit boards with wires connected to them looks impressive apparently and it is easy enough to do (it is probably no more difficult than figuring out which way a battery goes in).

    Bonus marks if you do something like:
    http://web2.murraystate.edu/andy.batts/ps/powersupply.htm
     
  7. Veho

    Global Moderator Veho The man who cried "Ni".

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    That's an interesting idea. And if you could measure and compare the wattage in both cases (if you can get a hold of enough multimeters), you could show the difference in power consumption. I bet it's larger than "turning off instead of leaving on 'standby'".
     
  8. ProtoKun7

    Global Moderator ProtoKun7 GBAtemp Time Lord Regenerations: 3

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    I'm assuming a lemon-powered clock won't get much applause in this exhibition? [​IMG]
     
  9. dinofan01

    Member dinofan01 Misses the old days...

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    Anyone else open this expecting it to be a topic on a temper that will go nameless for now. [​IMG]
     
  10. ProtoKun7

    Global Moderator ProtoKun7 GBAtemp Time Lord Regenerations: 3

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    Nope. But you just lost the game.


    Warning: Spoilers inside!
     
  11. zuron7
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    Member zuron7 RBYG

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    Thanks for all your help guys but I was discussing it with my partner and we are doing an oil skimmer.
    I can still change though got time till friday 8:30 am IST
     
  12. Raika

    Member Raika uguu

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    [​IMG]

    Make a nuclear weapon. A+++ [​IMG]
     
  13. Linkiboy

    Member Linkiboy GBAtemp Testing Area

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    I did. And it isn't, therefore I am disappointed.
     
  14. dinofan01

    Member dinofan01 Misses the old days...

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    I think we all were. [​IMG]
     
  15. PettingZoo

    Member PettingZoo yesss

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    Hover your mouse over the name to gain little insight :3
     
  16. dinofan01

    Member dinofan01 Misses the old days...

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    what name?
     
  17. House Spider

    Banned House Spider In the GBAtemp attic.

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    Give them a "Disney's Action Game featuring Hercules" disk.
     
  18. Veho

    Global Moderator Veho The man who cried "Ni".

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  19. ProtoKun7

    Global Moderator ProtoKun7 GBAtemp Time Lord Regenerations: 3

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    Immediately recognised as XKCD work [​IMG]

    I want there to be a lot more quickly, I've read all of them [​IMG]
     

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