Energy-Mass Equivalence

089 - Energy-Mass Equivalence

In this video Paul Andersen explains how the law of conservation of energy applies to both energy and mass. Einstein showed that mass and energy are equivalent and that the amount of energy contained within matter can be calculated using the famous equation E=mc^2. The fission of Uranium-235 is given as an example of matter becoming energy in a system.

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Music Attribution
Title: String Theory
Artist: Herman Jolly

All of the images are licensed under creative commons and public domain licensing:

[sciencetutorialu]

This is not an easy topic but you explained it so well. Great teaching!

[lyzh]

I found many explanations of this equation on YouTube, and THIS video, by far, is the best explanation yet. Thank you so much!

[johnsonjohn]

Dear Einstein, your predicted theory after challenging Niels Bohr is coming up. Sorry, it would slightly alter your super famous equation E=mc2. But don't worry. You are the winner after all! The New Space Concept, which comply with the Upanishads, that challenges sensual perception, and analysis and deduction of mind, is there with me. John Kolyav, Peruva, Kottayam, Kerala, India

[quixotic]

This was extremely helpful, thank you. I finally understood the mass-energy equivalence

[shinmalphur]

(Puts on sunglasses) We’ve been expecting you mister Anderson!

[zia-thelightofeducation]

i was searching it in so many videos and your video helped me to explain this in few minutes. now i can explain it to my students thanks sir.

[Rugbystu]

I understand the theory behind it but I really struggle with the maths. It might not seem complicated but because I was always bad in maths I now find it hard to even do a fairly simple calculation... I'm now trying to teach myself maths again using youtube tutorials and apps. Funny how things turn around when you get a bit older.

[aryalawamanuaba]

Thank you for the knowledge. I appreciate it very much.

[diwitdharpatitripathi]

Otto hohn. The German nuclear physicist and chemist and Fermi

[diegowhittembury]

great video! i would've like you to explain what does the speed of light has to do with this though!

[ImSpun]

Man this went over my head at the speed of light.

[trum]

So is it possible if you were to electric Megan magnet magnetically feel a neutron could you possibly equal c.

[blueties]

At 1:00 you say "so those neutrons flying around have a huge amount of energy".  Perhaps so, but it is the kinetic energy of the daughter nuclides that carry the great majority of the energy and produce the heat in a reactor.  On average it is about 169 MeV carried by these nuclides compared to about 4.8 MeV carried by the neutrons.  Also, if you had used more precise amu component values you would have achieved a more accurate mass defect.  I calculated 0.186 034 u rather than 0.189 u.

[BouBoow]

Mr. Andersen is my savior! You're the best!!

[zw]

Great video! Just one question, near the end of the video, when finding out how much energy was gained through the mass loss, using the equation, E=mc^2, how did you get from,
(3.14 * 10^-28kg)(3.0 * 10^8 m/s)^2 to 2.83 * 10^-11 J? Thanks again for the great video! 😁

[shashankchandra]

In Nuclear fission When the neutron hits the nucleus of u-235 some particle's(either one of proton's or neutron's mass in u-235 nucleus is bieng converted to energy right??)But the question is is it one of proton in u-235 nucleus or one of neutron in u-235 nucleus???

[dylanevans]

Is the left over 0.116u the energy of the gluon field?

[ericklopes]

Very well explained, overly simplified but perfectly understood, I though only geniuses could understand that. But it doesn't mean that physicists aren't geniuses anymore lol Thank you very much, love your videos.

[firstlast]

Great video. I have one question however: How come Uranium-236 fissions so instantaneously with ease but Uranium-235 doesn't? How does that one added neutron make such a difference? Thank you.

[khj]

So when people talk about mass being converted into energy, they actually mean just the atomic binding mass, which is only a small fraction of the total mass, is converted into energy? Is there a way to convert ALL the mass into energy? So in addition to the binding mass, we also get rid of the electrons, protons and neutrons and thus can get a whole lot more energy out?