Homework

 

If you could turn every one of the atoms in a paper clip into pure energy—leaving no mass whatsoever—the paper clip would yield 18 kilotons of TNT. 

That's roughly the size of the bomb that destroyed Hiroshima in 1945. 

On Earth, however, there is no practical way to convert a paper clip or any other object entirely to energy. 

It would require temperatures and pressures greater than those at the core of our sun.   

here

 

E=MC^2

It is a simple equation and it is easy to understand.

 It says that energy and mass are the same thing. 

Of course, we don't really know what energy is—despite the ability to calculate it in any number of ways. 

We do know that in a closed system if we calculate the energy, that value will be the same forever. 

Mass is the quantity of inertia, the ability for an object to avoid being accelerated. So an object possesses energy just by existing.

here 

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