IB Physics SL revision - Nuclear 5 - binding energy per nucleon

We're so excited to be able to share our exams with you!

Cheers, Mitch

[ibchemvids]

I gotta teach this tomorrow - cheers - I was struggling a bit!

[BobEnyartLive]

Thanks for tons of great science education. Please allow one correction though. At 7:20 you say that it's thought that heavy elements are made in supernova explosions. Science News explains that "simulations show that these explosions have an insufficient quantity of neutrons" (March 2013, p. 16-17). Previously, the National Academy of Sciences issued a 2003 report titled, Eleven Science Questions for the New Century, they included question #10, “How were the heavy elements from iron to uranium made?” Then the journal Nature reported that actually looking at a supernova explosion provides astronomers "no spectroscopic evidence that r-process [heavy] elements have truly been produced" (Rosswog, 2013, p. 536; see also Physics Reports, 2007; Astronomy & Astrophysics, 2011; and Physical Review Letters, 2013). (Studynova, I'd provide a link to my site where I link directly to all these sources, but I'm afraid I'd have the comment removed for spamming. :) Anyway, the supernova theory has been seen as deficient for years now and that has brought in a replacement, the merger of black holes with neutron stars or neutron/neutron star collisions. Of course, that theory also has the problem of the uneven distribution of uranium, thorium, etc., in Earth's crust and mantel, with radioactivity located primarily in the crust, and in the CONTINENTAL crust at that (as Lawrence Krauss admitted to me in an otherwise contentious interview), and its preferentially near granite. There are also the various unexpected isotope inconsistencies between the sun, moon, earth, etc.

[Jonathan-wjuh]

This is the first video of urs that I have watched and I love your style of teaching.

[THEPRINCESSAMAZING]

This was so great and you're such a brilliant teacher!

[swatir.]

THANK YOU SOO MUCH!!. i have a seminar tomorrow..and this was really

[rebecaklassen]

This clarified questions I had left after class. Thank you!

[naiefjobsen]

Hi Mitch!
In my physics course we are using the Cambridge university press, 6th edition book. Everything you have explained so far fits exactly the structure of the book. Except here in chapter 7 (Atomic, nuclear and particle physics) you explained the first 2 sections out of 3. 7.1 and 7.2 were perfectly discussed through your videos. Could you pleas do something about it. your videos really help and this section is quite tricky and contains plenty of material.

Cheers!

[pavanrai]

great video, and lots of help thanks!!!

[mhdadk]

This video helped a lot! Thank you again :-)

[TerenceYipMusic]

Thanks! Can you make a video on 7.3 The structure of matter? (New syllabus)

[HardikKundalwal]

Shouldn't it be Separation energy? because B.E is defined as "energy required to remove one nucleon from the nucleus". Just wondering

[amandugar]

Firstly, thank you
the video was really helpful.
though the question is what is so special about iron?why does it have the highest binding energy per nucleon?And isnt it Ni62 with the highest binding energy per nucleon?

[prajjwalsrivastav]

hi sir you have talked a little bit about formation of heavy elements through supernova
and i am interested in knowing the process behind that just out of curiosity.
So have you maded any videos about that?

[goutamsingh]

Should the peak point not be Nickel? Or am I mixing that up with something else? because I saw it in a graph in the physics book (KA Tsokos) where Nickel was the peak point

Update: I checked some sites and they stated that the peak point is Iron 56. Is the book incorrect? If so, can you please suggest a reliable book for Physics HL IBDP?

[wermsgalvan]

You Fuse before you Loose (binding energy per nucleon)

[charan]

you said products should have more binding energy but not BE per nucleon.. then how can u decide?

[stepbystepscience]

Good video, but it does not look like a whale. But it does look like Dorey from Finding Nemo.

[rajeshwarsingh]

wow. thanks man. have my exam tomorrow😂

[prasanthmeesala]

if you are saying that the stars burn H to He and so on then how come Earth which obviously have most of them without burning them . sorry to ask it . just a doubt . Thanks any way I was able to understand yet .

[axidpain]

*Gets Bothered By Writing With Left Hand On The Board And Chalk Banging Noise *