Recent content by valleysheep

  1. V

    Graduate Power Density of the Sun's Core.

    Ahhhh awesome, thanks for the final explanation astronuc and for the links. Thanks to Bill_K and mfb as well. Problem solved :P.
  2. V

    Graduate Power Density of the Sun's Core.

    How exactly does the plasma differ from that plasma within the star ? I am guessing as you've stated the density would be different. Also why wouldn't the 100million K temperature not just destroy the surroundings ? (I suppose i should look up a more in depth layout of the reactor to see the...
  3. V

    Graduate Power Density of the Sun's Core.

    Right ok. What temperatures would a reactor reach such as the JET project ? Can't seem to find this anywhere.
  4. V

    Graduate Power Density of the Sun's Core.

    Hi guys, I've recently stumbled on an interesting article highlighting a point by james jean that a pinhead of 1mm (I took this to mean that it was a box of 1mm sides so 1E-9m3 volume) heated to 15 million kelvin, sun's core, could kill a person 84 miles away. I tried working this out using...
  5. V

    Undergrad What happens to the angular momentum?

    Oh wow, makes sense now XD. Feel like a fool now for missing something so obvious :P. Thank you for helping.
  6. V

    Undergrad Newton's third law and surface area of paddles

    Adding my two cents to this :P The main point is that you are pushing against water. If you were to push against a solid the area would not matter. 50N applied to the Oar will give a 50N force against the solid. In the case of water having saying a thin oar, the water will pass around the oar...
  7. V

    Undergrad What happens to the angular momentum?

    Hi, Apologies in advance if this is in the wrong section or if i have violated a particular rule. (First post). I don't have a great grasp of classical mechanics, and so some of the simple aspects are lost to me :P. So to the question. Taking an ice skater as an example (or any other...