Question: Two square plates are to be glued together by means of a radiant heat source, q", acting on one plate (Fig.). The glue becomes effective at a temperature Tm. The ambient temperature is T∞. It may be assumed that δ1 and δ2 are small, k1 and k2 are large, so that lumped conditions prevail. Find the time required to obtain a bond between the plates.
![1640_3P 1.png](https://secure.tutorsglobe.com/CMSImages/1640_3P 1.png)