Pkolo: Stephen Cribb. 



TRANSFORMATION OF ENERGY 



An illustration of Energy. The chemical energy brought into existence by firing the explosive manifesting itself as mechanical energy, 



sufficient to impart violent motion to tons of water. 



Pkolo: Underwood (r Underwood. 



"BOILING" A KETTLE ON ICE 



When a kettle containing liquid air is placed on ice it " boils " because the ice is 

 intensely hot when compared with the very low temperature of the liquid air. 



