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Fun fact: There's about 200 Hiroshima atomic bombs worth of energy in a banana.

And there was vastly more energy potential in the Hiroshima bomb than was actually released - of the 64 kilograms of uranium in the bomb, less than one kilogram underwent fission, and the entire energy of the explosion came from just over half a gram of matter that was converted to energy.

By the above banana logic; How many Hiroshima atomic bombs worth of energy were in the Hiroshima bomb?

By the logic of banana energy potential, you have to go for all of the energy in the entire bomb, not just energy that could be easily released through fission. That's about 4*10^20 Joules vs the 6*10^13 Joules released over Hiroshima.

which, by Cave Johnson logic, gives you about 6.5 million more bombs per bomb!

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