What Does "Weight x Density" Equal?

[Phrak]

If you took a mass M and converted it to energy, the amount of energy you would get is Mc^2.

Urm. E=mc^2 is not a conversion equation but an equivalence. If it where, it would be E+mc^2=0 though there are endless authors that do this...

 

[DaveC426913]

Urm. E=mc^2 is not a conversion equation but an equivalence. If it where, it would be E+mc^2=0 though there are endless authors that do this...

Can you elaborate?

 

[Phrak]

Can you elaborate?

Well, I'm not sure how to elaborate. In your first statement you say they are equivalent which is consistent with E=mc².

But I hear this statement about converting mass to energy often enough in various forms. This isn't consistent with E/m=c²=constant where m is the ponderable, inertial mass. So the energy and mass are there all along.

In an atomic reaction, the energy doesn't change to mass, but some of the binding energy that was there all along becomes kinetic.

Interesting factoids:
The exact statement "mass energy conversion" gets 401,000 google hits.
Searching strictly on site domains .edu obtains 24,000 hits.

There are a number from hits from Princeton, which is ironically apropos, abit most seem to be cosmologists.