Physics - Nuclear Physics (2 of 22) Energy Equivalent of Nuclear Matter

[@curtpiazza1688]

Wow! After all these years I finally understand how these conversions work! 😮 😊

[@MichelvanBiezen]

Great! Glad you found our videos. 🙂

[@Joel-ti2jp]

2:30 equasion does not match up on calculator? is x 10^19

[@Physics-Learner-fs8xd]

michel i have a question did you learn nuclear chemistry as well with nuclear physics?

[@MichelvanBiezen]

Fundamentally they are very closely related, and they differ mostly in their applications. But my field of study was primarily physics.

[@neypaz8054]

In my career, I only studied two subjects related to nuclear physics, and the second one was optional. I would have loved to see more. *sob*

[@anthonydelille100]

For an electron, you can't use E = mc², because it behaves like a wave. The energy of an electron depends on its speed. You should use E² = (mc²)² + (pc)²

[@MichelvanBiezen]

Anthony, The energy equivalent for the mass of all particles (including electrons) is mc^2. The total energy if the particle is moving at relativistic speeds is as you stated. An electron normally doesn't move at relativistic speeds (even though it has wavelike properties).

[@anthonydelille100]

Ok, thanx for the explanation. :-)

[@Ivonneselasi]

But Sir why is the energy of e in KeV instead of MeV

[@MichelvanBiezen]

The mass of an electron is far less that the mass of a proton. That is whey the mass-energy equivalent for an electron is usually expressed in terms of keV 512 keV = 0.512 MeV

[@jamshedsaeed9445]

sir what is the difference between E=mc`2 and E=hf.

[@MichelvanBiezen]

E = hf is the energy a single photon contains. E = mc^2 shows how mass can be converted to energy and energy can be converted to mass, it how much energy it takes to make mass.

[@jamshedsaeed9445]

Thank you sir .

[@Iandavidandrino]

941 eV *

[@MichelvanBiezen]

Ian, Not sure what you are commenting on. If you are wondering what the energy equivalent for the mass of a proton is, it is indeed about 940 MeV/c^2

[@Iandavidandrino]

Michel van Biezen Didn't you divide the value by 1.60x10^-19? I thought to convert Joules to MeV you would divide the value by 1.60*10^-13

[@MichelvanBiezen]

Ian Summerlin Ian, I understand your question now. I made the conversion. Check the answer and it will come out correctly,