Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Thermodynamics question please help

  1. Apr 18, 2010 #1
    1. The problem statement, all variables and given/known data

    The rate of heat loss to the outside through a 10mm-thick glass roof of a green house is 120kW. The length and breadth of the glass material of the roof are 20m and 2m, respectively. Calculate the temperature of the outside if the temperature inside the green-house is 25 degrees C.

    Assume thermal conductivity of the glass material is 1.0W/m/degrees C.

    Please help as I don't know where to start.

    2. Relevant equations

    3. The attempt at a solution

    I'm not sure where to start unfortuanatly.

    Thanks in advance!
  2. jcsd
  3. Apr 18, 2010 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    There is an equation that relates heat conducted and temperature. It involves the thermal conductivity too.

    The fact that you have been assigned this problem means that this equation is somewhere in your textbook, lecture notes, or class handouts. Find this equation in your textbook, lecture notes, or class handouts -- that is where to start.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook