I'm not too good with these special relativity problems :/

The question is: A 20 kiloton bomb releases 8 x 10^13 joules. How much mass must be converted into other forms of energy?

You are already given Energy, would I still use the E=mc^2 formula??

E=(2.0*10^7 kg)(3*10^8 m/s)^2 ?

3 answers

unlessss....

I just solve for mass and the 20 kiloton is just extra useless information meant to throw people off and do this:

e=mc^2 m = E/c^2

m = 8*10^13 J / (3.0*10^8 m/s)^2

m= 8.89 * 10 ^-4 kg hmm
I agree with this:

e=mc^2 m = E/c^2

m = 8*10^13 J / (3.0*10^8 m/s)^2

m= 8.89 * 10 ^-4 kg hmm

A gram of mass is a lot of energy.
thank you! How would I know not to use the mass of 20 kilotons though? I wish they didn't put that in the question it really throws you off haha
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