Recent content by mstrakl

  1. M

    How can I calculate the cooling time of a steel ball using thermal radiation?

    Oh of course... I have found the problem now... Thanks :)
  2. M

    How can I calculate the cooling time of a steel ball using thermal radiation?

    I did the algebra again, I hope photo sharp enough ... i get the same result, I checked twice. 51,14 seconds. The correct result should be 313 seconds :S
  3. M

    How can I calculate the cooling time of a steel ball using thermal radiation?

    Homework Statement Hi! I need some help by my phisycs homework at universty. Here is the problem: We have a steel ball, with density of 7800kg/m^3, with speficic heat capacity 460J/kgK. Temperature of the ball is 1700K. How much time does the ball need to cool down to half of it's temperature...