what is in dynomite that makes them blow with fire?

Question

i always wonder wht it is that makes that big kaboom

Answer 1

TNT
http://en.wikipedia.org/wiki/Trinitrotoluene

Answer 2

Dynamite is simply some sort of absorbent material (like sawdust) soaked in nitroglycerin. The absorbent material makes the nitroglycerin much more stable. You normally use a blasting cap to detonate dynamite -- a blasting cap creates a small explosion that triggers the larger explosion in the dynamite itself.
Kaboom!