Thermal conductivity of glass

  1. Uhmm.. i faced some problem with my experiment of finding the thermal conductivity of glass..i hope that someone can help me.
    May i know the extimation of the thermal conductivity of a boiling tube??
    isit the same as the thermal conductivity of pyrex glass??
    when i want to find the radius of the boiling tube, should i take the reading of the external diameter divided by 2 or the internal diameter divided by 2??
    and about the thickness of the boiling tube, its the external diameter deduct the internal diameter then divided by 2 isit??:confused:
    i will really appreciate your help..
  2. jcsd
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