Help!! A2 physics planning exercise!!!!!!! Is anyone doing the A2 OCR physics planning exercise? I have just finished the AS one that soooooo many people have been talking about (I am resitting it from last year!) but now have the A2 one to do. It is the one with the surface temperature of the glass envelope of a light bulb. Does anyone know how to cool the bulb down between experiments? Help would be much appreciated! before I start crying !!!!! I am using thermocouples if any one is stuck with the kind of thermometer to use!