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jedishrfu's Recent Activity

  1. jedishrfu replied to the thread B Unusual question about video experiment on YouTube.

    Looks like a Leyden jar: https://www.wired.com/2017/01/the-physics-of-leyden-jars/ He's not showing you everything in the video like...

    Jan 19, 2018 at 11:15 PM
  2. jedishrfu replied to the thread I Can you reduce a vector triple product? i.e. (A x (uB x C)).

    Short answer is yes which you can see from the identity u x ( v x w ) = (u.w)v - (u.v)w https://en.wikipedia.org/wiki/Triple_product#Proof

    Jan 19, 2018 at 11:06 PM
  3. jedishrfu replied to the thread B Instant Runoff Voting and How Safe Movies Win.

    To expand on the fairness in voting, here's an article on redistricting:...

    Jan 19, 2018 at 10:58 PM
  4. jedishrfu posted a new thread.

    B The Hunt for Red October's Catepillar

    This article discusses the famed Caterpillar drive from the movie "The Hunt for Red October":...

    Forum: General Physics

    Jan 19, 2018 at 3:47 PM
  5. jedishrfu replied to the thread B Simple Question About Term(s) re: Fermat.

    I couldn't find a reference to the theorem you mentioned. I did find Fermat's Sum of Two Squares theorem:...

    Jan 19, 2018 at 3:28 PM
  6. jedishrfu replied to the thread B Reason for black gel pen refills leaking in winter.

    http://www.penturners.org/forum/f18/what-causes-ballpoint-leak-ink-122378/ One poster suggested that maybe the refills are broken when...

    Jan 19, 2018 at 3:22 PM
  7. jedishrfu replied to the thread B What makes the Navier Stokes equation so difficult?.

    In a related article on Navier Stokes, mathematicians find some extreme conditions where the equations appear to fail:...

    Jan 19, 2018 at 12:17 PM
  8. jedishrfu liked mfb's post in the thread B Instant Runoff Voting and How Safe Movies Win.

    The perfect voting system cannot exist - Arrow's impossibility theorem - at least not if you just ask for an order of preference. There...

    Jan 18, 2018 at 9:37 PM
  9. jedishrfu replied to the thread Programs Which subfield of physics should I choose?.

    I would check with your advisor and anyone knowledgeable at your school in these areas. They would likely have the most relevant info....

    Jan 18, 2018 at 6:11 PM
  10. jedishrfu replied to the thread Drone fails compilation... Beware of monkeys with sticks.

    I was thinking the same thing. In this case though the swimmers were quite far out. Maybe a drone boat or surfboard followup would...

    Jan 18, 2018 at 5:29 PM
  11. jedishrfu replied to the thread C/++/# Class, Interface, Abstract, Static, Partial, Sealed.

    Except the interface doesn't boil down to some memory. Interfaces are used as a datatype contract to say that the class that...

    Jan 18, 2018 at 3:25 PM
  12. jedishrfu replied to the thread Drone fails compilation... Beware of monkeys with sticks.

    Here's a Drone success story: http://www.newsweek.com/watch-drone-help-save-lives-australian-swimmers-historic-use-technology-beach-784587

    Jan 18, 2018 at 2:43 PM