Recent content by cfkorea

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    How Do We Calculate Outgoing Energy from Our Body Using Stefan-Boltzmann's Law?

    Using Stefan-Boltzmann's Law, Determine the quantity of outgoing energy per unit time from Our Body. The answer should be of form Watt(W). You must consider that our body not only radiate but also absorp energy. Can anyone answer this question, please? I don't need the exact answer...
  2. C

    Total Acceleration of a Ball Whirled in Inclined Vertical Circle

    hmm.. I have a question. If a ball is whirled in a vertical circle inclined from the horizontal axis at angle \theta. what is the total acceleration of the ball?
  3. C

    A difficult mechanic problem with spring

    I hope someone's help. If someone has some idea of following thing, please write your idea here. Problem: There is a spring(spring constant: k) fixed on the floor with massless board fixed upside of it. Peter put a box of m(kg) on the board and make spring in a state of equilibrium.Peter want...
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