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  1. W

    What is the kinetic energy of a 10-kg bicycle moving at 10 m/s?

    this is a fairly subtle question. if the bike was simply a 10kg object moving at 10m/s, then the KE would be KE = 0.5*m*v^2 = 0.5*(10kg)*(10m/s)^2 = 500 J but there is also rotational KE in the motion of the tires, which depends on their moment of inertia and radius. but as you didn't...
  2. W

    what does the "A" stand for in laser physics?

    Ångström a unit of distance equal to 10^(-10) m cheers
  3. W

    physics and consciousness.?

    "quantum theory and relativity both depend on "observers" " no - they don't. the rest of your post is philosophy/metaphysics... so, you should probably post those parts in the philosophy forum... good luck!
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