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can we convert energy to mass

Can we convert energy To mass?
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Yes....by Einstein's mass energy equivalence i.e Energy is equal to product of mass and square of speed of light. ..
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Mass is never converted to energy. Mass is a measurement of energy. Please look up mass energy equivalence before babbling more wrong information.

For example, a photon does not have a rest mass value, but has a relativistic mass value. Both are mass but relativistic mass depends on relative velocity.

I guess we can convert mass to energy like converting cups to liters. E=mc^2 is a conversion factor for a conserved quantity. For example: when I wave my arms around, post links and yell, there is a mass value associated with my handwavings. Not very much, but a value. In fact, in most reference frames my handwaving has a rest mass value. This is no different than a rest mass in a particle or heavy rock.

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Energy can be converted to mass. For example, when you accelerate protons to high velocity ans smash them into a tungsten target, you produce anti-protons. They are in part from the energy of motion carried by the protons. This is the production of antimatter.
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Mass is a measurement of energy content of a system. It is a conserved quantity, and is always present no matter what form the energy is in.
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Opinions mean nothing. Let us look at facts. Mass of a proton: 1.67262178e-27kg. Mass of a neutron: 1.67492735e-27kg. Put them together and you get a deuteron. Mass of a deuteron: 3.343583396e-27kg. Guess what? It is LESS MASSIVE by 3.96577e-30 kg. In other words, I put 10 and 11 together and got 20. You know where the missing mass went? It became binding force. It is less massive. End of argument.
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