why are bricks burnt in kilns

Question

they arnt burnt, they are baked, it increases the hardness and water resistasnce over just letting them sit and dry.

Bricks are ceramics. They have to get to a high temperature before the silica in the bricks melts and bonds together to make it strong

Thanks bob, the word cilica evaded my conciousness.

thanks ken and bob for your prompt answer

Light is incident on a plane mirror at an angle of 46 degrees relative to its surface. What i the angle of reflection?

gave me a sentences for abolitions?