Challenge Definition and 905 Threads

  1. E

    Did Einstein's Work Affect All Areas of Physics?

    I challenge you to name at least one area of physics that the work of Einstein did not somehow affect. If you take this challenge, you, like your pathetic parents, are destined for failure. eNtRopY
  2. U

    Experimenting with a Frog: A Fun Challenge?

    I wonder if you could scale this experiment up with a human it could be fun, mind you I am not convinced that the pioneering little frog was alive for very long, if you watch the movie it also seems that only one side of its body works but maybe its just confused or enjoying itself :/ see...
  3. Tyger

    Graduate Solve the Challenge: Prime Pair Sum Always Divisible by 12

    Who will be the first to prove that (with one exception) the sum of any Prime Pair is always divisible by twelve?
  4. M

    Graduate Challenge - A problem in astronomy

    Given - 1) Twin earth-sized planets rotate about each other in a solar system. 2) The plane of their mutual orbit is the same plane in which they rotate about their star 3) Their star provides (on average) the same amount of energy as our sun Questions - 1) What is the size and nature of...
  5. W

    Graduate Challenge: two electromagnetic problems

    (a) When there is a phase-to-neutral fault on a transmission line, will the existence of the neutral wire increase or decrease the magnetic field under the transmission line? Why? (b) Assuming that the whole space consists of an upper half space with soil resistivity r1 and a lower half...