I'm well past the point in my life where I need to study this stuff, but I love geeking out to your videos just the same. Excellent work! Thanks

Thank you for all of your videos. I've never found anything that teaches how to science with math and interesting topics all in one video. You are a very kind person to share all of this with the world.

Love your work. No frills, honest physics & maths. Great presentation and cadence. And the line "let's call it 1.5 for cash" was the icing on the cake.

Thank you so much!!! I have been looking for the explanation to this query since so long :) Explained beautifully. Its amazing to see how activation energy affects a process so significantly.

The learning possible through these videos is tantamount to that of a real classroom

Brilliant work! You make it easy to understand and visualize. Great series!

Very well explained, thank you. Greetings from Germany

2 1/2 minutes in and I have subscribed. Excellent presentation of information so far.

just find out about this channel... it's a gold nugget!

This vid is amazing because even if you dont understand what the terms themselves do, you can easily understand how they cancel out

Still watching in 2020. So inspiring! Thank you!

Brilliant explanation!

Fascinating!

The whole way through I was like, what about fissile elements! Then zing! Cliffhanger! Can't wait for the next episode, thanks!

Perahps my favorite video on KZfaq!

wow - what an amazing video

Excellent stuff. It might be worth considering avoiding repeating things and make the video flow better.

Good work Dr ^_^

It is just a matter of time for Gold to go Iridium then Rhenium and so on. Of course neither you or me nor the whole human existence as we perceive it will ever notice such an event but anyway it will happen, particularly for Gold as it is monoisotopic and a odd-numbered element. Good video, though. You have a new follower.

9:30 you draw graph N vs Z and previously the curve of real stability was above the N=Z line so the point (Z/2, N/2) should be under the line you draw. Correct me if I'm wrong. PS. Thank you for those videos, they are great. You make physics easy and interesting :-)

Thank you so much for your lectures on KZfaq... Greetings from INDIA :)

wow great explanation

What's the criteria for stability? What's the criteria for instability?

Thank you :-)

Remember I have asked you this before? Ah! Now I understand. Thank you very much! Although, I still wonder why not all gold turned into iron, with so many high energy cosmic rays out there that could provide the AE....?

Wouldn't there exist any tunnel effect anyway? why?

Can anyone provide the link to one of his videos explainig binding energy and mass defect

Can anyone link this binding energy video he keeps referring to?

nature is beautiful.

where is the next video ?

thanks

What kind of pencil or marker is that ?

hey your voice sounds familiar, have you been on periodicvideos?

Is the final computation correct? I fear it is not, since the same result for the binding energies of the two daughter nuclei would have been obtained when the two being far apart. I think you missed the coulomb barrier between the two daughter nuclei, which is what I fear gives the actual activation energy.

How does a Neutron automatically gain a + charge?

So this rule basically works out like a mirror of surface tension? Interesting.

Who says we know they don't? It wasn't long ago we thought bismuth was stable.

where are you??

The nucleus with highest binding energy is Ni-62, not Fe-56.

Why iron? What's so special about iron that it has the highest binding energy per nucleon ?

Is there a reason as to why you cross your sevens and zeds? Is it a physics thing?

Well I don't know about iron, but everything I touch almost immediately turns to sh*t, so yeah... this effect surely exists.

The nuclei decays only if it is radioactive...

But can you spin straw into gold, Rumplestilskin?

Quantum tunneling will do that eventually to all nuclei heavier than Fe 56 but the timescales required for this to happen are ridiculously long, think of something like 10^1500 years.

you made a mistake the binding is not defined as the energy that holds the nucleons togehther.I use to think the same thing as it's intuitive but physicists define it instead as the amount of energy need to sperate the nucleans to infinty.

So due to the tunnel effect all elements heavier than Fe-56 will eventually decay into Fe-56. Good to know, I shall not buy large stocks in iron and then try sell in the future.

It's relativity...it's the outside forces that held a molecule together that has changed and not the energy of the molecules and that's the reason...no need for a 30min presentation

11:30

The increase in surface area is creation.