fuckyeahphysica: A note on Nuclear Fission When an atom…

fuckyeahphysica:

A note on Nuclear Fission

When
an atom fissions, it releases a teeny tiny amount of energy ( The decay of one atom of uranium-235 releases about 200MeV or about 3*10-11J.). But atoms
are quite small. An atom does not make a big explosion when
it splits.

To get a big explosion, you need to split lots and lots and
lots and lots and lots and lots and lots and lots and lots of them—many,
many trillions of them.

Each one releases only a teeny amount of
energy, but when you add up the teeny amount of energy from trillions
and trillions and trillions of atoms, then you get a big explosion. (The explosion of 1kg of TNT releases 4MJ).