Seeing other people comment saying that their exams are also tomorrow is so heartwarming. I can't thank you enough for helping me, especially in prepping for my final IB exams tomorrow. Insanely grateful! These videos are awesome
our exams are tomorrow and prolly wont come back to these videos, just wanted to say i really appreciate these very very much and have helped me a bunch
I have my final exams tomorrow. Thank you for being the teacher I could only wish to have at my school, you've been a lifesaver for every test these past 2 years.
Hi, it's about 3AM here and my exam's at 1PM. I've almost finished binging your videos, and I must thank you. I was blatantly memorizing definitions for this paper which I realized was wrong. I was stressing a lot. But the way you explained this was amazing. Thank you so so much! I'll probably never do physics in my life again once these exams are over. Just wanted to let you know this isn't the first time you've helped me. Thank you so much again and I wish you the best of luck!
My exam begins in 5 hours and I've learned more in the past 5 days watching your videos then I have in the past 2 years of ib. I really cant thank you enough. Feels weird knowing I wont have to come back here again. farewell:(
My last year teacher did not teach us Optics very well, and i was sick and missed Topic C in class. Having nowhere to go, I found your videos and astrophysics really sounded interesting, so with a leap of Faith, I chose to do Astrophysics and your videos have made it SOOO EASY, I learned everything within a Day! Thank you so much you saved my paper 3.
Thank you for everything. I will not be choosing a physics-related path for my career at University (go economics!), but your videos in physics, and math really helped me in the last push of my DP program. I really thank you.
Thank you so much for everything, you have helped me a lot with your videos and your explanations. Tomorrow I am taking the test! And by the way I love your memes, they always make me laugh. You are a lifesaver!
this is the most interesting topic in this course so far. you have done a great job explaining the concept in a way that is engaging for the viewer. you have helped a lottt
i feel like how you described change of wavelength after 2:00 wasn't done so well, it didn't clear up much of my confusion But correct me if im wrong, the change in wave length is like if : you have a hydrogen source on earth, and that emits wavelegnth of light of light that is spread on a spectral linie with wavelength W. you detect more light waves from other hydrogen sources far away (which are main sequence stars), and it has different wavelength compared to the one on earth. The different between these two is the change in wavelength in the numerator yes? and the denominator is the wavelength of hydrogen source on earth
Do you know how to find the constant H0? I have been researching for a long time and I can't figure out how, because i cant find the distance to the galaxies (velocity is easy because I do have the redshift)
We can find H0 in a few ways. One is to just find the gradient of the graph of recession speed v, versus distance. That's one of the main ways. science.nasa.gov/missions/hubble/new-hubble-constant-measurement-adds-to-mystery-of-universes-expansion-rate/
Z is just called the 'redshift' - it's used for many things, including telling you about how the universe is expanding. So far as I know, the object with the highest redshift z is GN-z11, is a high-redshift galaxy found in the direction of the constellation Ursa Major (the Great Bear). GN-z11 is currently the oldest and most distant known galaxy in the observable universe, with a redshift of z = 11.09. That redshift corresponds to a distance of 13.4 billion light-years. So we see this object as it existed 13.4 billion years ago, just 400 million years after the Big Bang.
![HL - Nucleosynthesis 1 [IB Physics HL]](http://i.ytimg.com/vi/ZXh4WYwkp60/mqdefault.jpg)
![HL – Nucleosynthesis 1 [IB Physics HL]](/img/tr.png)
![Stellar evolution 1 [IB Physics SL/HL]](http://i.ytimg.com/vi/222JprAo7K8/mqdefault.jpg)
![HL - Rotation curves of galaxies [IB Physics HL]](http://i.ytimg.com/vi/vqGhG190Flk/mqdefault.jpg)
![Big Bang Evidence [IB Physics SL/HL]](/img/1.gif)
Seeing other people comment saying that their exams are also tomorrow is so heartwarming. I can't thank you enough for helping me, especially in prepping for my final IB exams tomorrow. Insanely grateful! These videos are awesome
I'm so glad you like the videos and support. Good luck on the exams. You've got this!
our exams are tomorrow and prolly wont come back to these videos, just wanted to say i really appreciate these very very much and have helped me a bunch
I'm so glad you enjoyed the videos and found them useful. Good luck with your exam - you've got this!
I have my final exams tomorrow. Thank you for being the teacher I could only wish to have at my school, you've been a lifesaver for every test these past 2 years.
So happy to help! Good luck on the exams :)
Hi, it's about 3AM here and my exam's at 1PM. I've almost finished binging your videos, and I must thank you. I was blatantly memorizing definitions for this paper which I realized was wrong. I was stressing a lot. But the way you explained this was amazing. Thank you so so much! I'll probably never do physics in my life again once these exams are over. Just wanted to let you know this isn't the first time you've helped me. Thank you so much again and I wish you the best of luck!
Thank you so much for the kind words, I hope that exams went well!
My exam begins in 5 hours and I've learned more in the past 5 days watching your videos then I have in the past 2 years of ib. I really cant thank you enough. Feels weird knowing I wont have to come back here again. farewell:(
So happy I could help you!
My last year teacher did not teach us Optics very well, and i was sick and missed Topic C in class. Having nowhere to go, I found your videos and astrophysics really sounded interesting, so with a leap of Faith, I chose to do Astrophysics and your videos have made it SOOO EASY, I learned everything within a Day! Thank you so much you saved my paper 3.
I'm so glad I could help!
Thank you for everything. I will not be choosing a physics-related path for my career at University (go economics!), but your videos in physics, and math really helped me in the last push of my DP program. I really thank you.
You are most welcome! Good luck with your exams! Cheers, Mitch
I have my paper 3 tomorrow, i cant describe how much this has helped me, Thank you for the amazing explanations!
You're so welcome!
Best resource I have seen in the DP. Thank you for everything sir.
You are very welcome!
@@OSC1990 Do you have any recommendations with which resources we can best apply our knowledge in test-yourself questions?
BALLOONS are an excellent analogy (If they can be called that, they more like a model)! very well done Sir!
Thank you so much :)
HL physics is not complete without you. ❤
Thank you so much!
Your videos have been so helpful in revising for the finals! You’ve saved my physics grade
I'm so glad to be able to help you. Go kick butt on your exams! :)
on god i really want to express my gratitude for this, taught me so much, first time i have actually understood physics on god
That makes me so happy! I'm glad that you can benefit from the videos. Cheers, Mitch
Thank you so much for everything, you have helped me a lot with your videos and your explanations. Tomorrow I am taking the test! And by the way I love your memes, they always make me laugh. You are a lifesaver!
So happy to help you out, in any way I could :)
this is the most interesting topic in this course so far. you have done a great job explaining the concept in a way that is engaging for the viewer. you have helped a lottt
Glad you enjoyed it!
i feel like how you described change of wavelength after 2:00 wasn't done so well, it didn't clear up much of my confusion
But correct me if im wrong, the change in wave length is like if :
you have a hydrogen source on earth, and that emits wavelegnth of light of light that is spread on a spectral linie with wavelength W.
you detect more light waves from other hydrogen sources far away (which are main sequence stars), and it has different wavelength compared to the one on earth.
The different between these two is the change in wavelength in the numerator yes? and the denominator is the wavelength of hydrogen source on earth
Thanks, your videos helped me out a lot today. Answered all but one question from the Astrophysics section, this is an interesting topic tbh
Well done!
a few hours till paper 1 and 3. I am so cooked
Really enjoyed watching your videos 😊
I'm so glad you enjoy them! Cheers, Mitch
ty
You're most welcome! :)
Did you have anything to do with writing the astrophysics syllabus?
I did collaborate with the IBO many years ago to design the astrophysics option, yes.
hey can we please have a revision session a day before our physics exam?
Unfortunately I'm travelling but I hope these videos serve as a good resource for you. Good luck on the exams - you've got this! -Mitch
Do you know how to find the constant H0? I have been researching for a long time and I can't figure out how, because i cant find the distance to the galaxies (velocity is easy because I do have the redshift)
We can find H0 in a few ways. One is to just find the gradient of the graph of recession speed v, versus distance. That's one of the main ways.
science.nasa.gov/missions/hubble/new-hubble-constant-measurement-adds-to-mystery-of-universes-expansion-rate/
I'm still a little confused with z and what z does, what do we know from calculating z?
Z is just called the 'redshift' - it's used for many things, including telling you about how the universe is expanding. So far as I know, the object with the highest redshift z is GN-z11, is a high-redshift galaxy found in the direction of the constellation Ursa Major (the Great Bear). GN-z11 is currently the oldest and most distant known galaxy in the observable universe, with a redshift of z = 11.09. That redshift corresponds to a distance of 13.4 billion light-years. So we see this object as it existed 13.4 billion years ago, just 400 million years after the Big Bang.
Exam in 2 days 😬
Good luck - you show those exams who's boss! :)
how did it go
@@User-0192-c8d got the diploma 😎😎😎
@@triston3377 how did u do in physics out of 7
@@User-0192-c8d 5
To anyone who reads this, goodluck tomorrow 🫡
Good luck to you as well! -Mitch
My exam is in 10 mins. Thank you so much. I’ve been watching the past week.