GCSE Physics - Radioactive Decay and Half Life #35
Вставка
- Опубліковано 7 чер 2024
- This video covers:
- How radioactive decay works
- What activity means
- The two definitions of half-life
- How to show radioactive decay on a graph
- How we can find the count rate with a Geiger-Müller tube
- Example calculation for radioactive decay
General info:
- Suitable for all GCSE and IGCSE courses
- See below for whether it is higher or foundation tier for your exam board
- See below for whether it is triple or combined for your exam board
Exam board specific info:
AQA - Everything is relevant to your course!
IGCSE Edexcel - Separate science and higher tier only
Edexcel - Everything is relevant to your course!
OCR 21st Century - Everything is relevant to your course!
OCR Gateway - Measuring half-life using graphs and calculating involving half-lives are only for higher tier
Related videos/topics:
GCSE Chemistry playlist:
• GCSE Chemistry - Atoms...
GCSE Biology Playlist:
• Video
GCSE Physics Playlist:
• Video
#9-1
this guy taught me more in 6 minutes than my physics teacher can in a week
*ever
@@AS-rq6tr aha tru :))
My physics teacher is shit
im sure you didnt learn how to make gravity gun from ur physic teacher
fr fr ;)
its gotten to a point where people need to specify which half life they're talking about
@@dauzlee2827 YES HAHAHA!!!! WHICH ONE IS HE TALKING ABOUT!!!!???????
Like the game
That’s a good thing
Noice one
@R_of_L Productions frrrr
Gordon doesn’t need to hear all this. He’s a highly trained professional!
Alright, this guy is too underrated!! Push him to the top please, he deserves it!
yeaaa
If you’d like to practise what's covered in this video, check out the lesson on the Cognito platform - cognitoedu.org/coursesubtopic/p2-gcse-aqa-h-t_8.05. The platform’s totally free, and has been built to make learning and revision as easy as possible. The main features are:
- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.
Amadeus & Tom
Where’s the funny screaming scientists and silly Star Wars lookin aliens?
just learnt this today in class, was super confused but now it’s all clear thanks to you🙏👏
Edit: so it’s been 3 years lmao and i dunno why I’m updating this but I just wanted to thank this channel cuz I got A* in all my sciences:) I’m in uni now and yea thx for helping us out
Aha thanks Lily - really happy it made sense to you!
@@Cognitoedu agree
Same here
@@lil_thiccpeach9067 what major are you doing
i’m so proud of you!!!
i'm sorry but this guy is better then free science lessons. I learn so well from cognito like fully he is so easy to understand. He might actually save my GCSE grade!! I hope this video does me well for Wednesday's mock.
(update: he did save my gcse and now i am in the sixth form i wanted to go to :) )
hope it went okay! i have mine in the afternoon 🥴🥴
@@freyaa1200 i did terribly on physics because it was all the waves topic which was the one topic i didn't revise but it's okay i'll make up for it in biology and chemistry i hope. good luck for the paper you probably just sat :)
@@isabellaaslam9372 omg ahhh unlucky! mine was on all of the equations that we had to learn involving kWh, forces, solar panels efficiency and radiation but i didn't enjoy it at alllll hah it wasn't terrible but it was the stuff i revised the least :( thanks tho!
i'm sure your chem and bio will be great! - i defo prefer these hha
i've got maths non calc and spanish tomorrow, good luck on yours and i hope you have a lovely weekend :) x
@@freyaa1200 thank you! good luck and have a lovely weekend too :)
@@isabellaaslam9372 tyyyy xx
Personally, I prefer the game.
Ye
Which one
I knew someone would say this 😂
i kept thinking this during physics lmao
Half-life Alyx on top 🔥🔥
Gordon doesn't need to hear all this, he's a highly trained professional
I have end of years exams around these topics and you were a great help to help me revise . I don’t know where I would be in revision without this channel , you just earned another subscriber
i was looking for a physics analysis from the *game* "Half-Life", but science is cool
Rise and shine, Mr Freeman.
Not that I wish to imply you have been sleeping on the job
@@seowyy No one is more deserving of a rest... and all the effort in the world would have gone to waste until... well, let's just say your hour has... come again.
@@electroblastz The right man in the wrong place can make all the difference … in the world. So, wake up, Mister Freeman. Wake up and … smell the ashes.
@@MD-dw5eeI didn't see you get on
This guy is much more talented than my physics teacher..If I hadn't watched it on the first place,maybe it would take me a week to understand this concept...mister your knowledge is appreciated 👍💞
Thank you, I was really struggling with understanding half- lives and watched many videos to try help me with it but they didn't help. Now I understand, thanks!
honestly these videos are a lifesaver. And thats the biggest understatement!! Love your channel
gordon freeman is a highly trained professional!
He doesn't need to hear all this!
a bit disappointed this isn't a half life play through
You and me both
Rise and shine Mr. Freeman... Rise and shine...
This video legit saved my life. I learnt this about 2-3 weeks ago in class and never understood, here I am today one night before my test and I get everything. Bro you're gonna save my GCSEs.
Great video thank you I like to watch your videos one at a time every so often. Rounds my knowledge so that hopefully I’ll have good overall knowledge when it comes to my mocks and GCSEs
Hey, thank you for taking the time to leave us a comment! We really appreciate it! That’s a great strategy - little and often will get you well prepared! Good luck with all your work! 🤙
i see where the half life decay dlc got its name from
teaching myself chem bio and physics so thank you for explaining everything - I’ve recommended u to basically everyone Ik
Ah thank you! Glad you've found the channel helpful
Youre videos are SOO helpful, i have no idea how u're not on a million subs yet. Keep up the good work 😉
Gordon doesn’t need to hear all of this, he’s a highly trained professional - half life game scientist
Who's Gordon?
@@meenakshibhat6713 he’s from a video game called half life
Oh
"where headcrab?" - some kid
All i can image is a scientist escaping a facility called black mesa
Thanks !!!!!! I liked the explanation and graphs :)
How does the gravity gun work
where’s gordon freeman
someone get this King his crown
Broooo why do u explain everything so well? First, I was like I don't get it, but especially when you go do the exercises on your page and look back on the video, everything makes so much sense. Applying your knowledge really helps things stick better I find
THankss
Glad it's helping Rorie!
@@Cognitoedu weird name isn't it
Seriously helpful, thank you
wow, you explain things incredibly well! I came to your video because I was super confused in class but now you have made my mind so much more clearer!
Thank you so much! Really helped to understand :))
I am new immigrants to UK,just join year 11,as my English not really good,I try very hard to listen to English,and work hard in science,thanks a lot,I learn many from this channel,but if there have subtitle,that will be perfect
good luck i wish you all the best!
Very helpful and easy to learn!
Thank you very much for the excellent explanation.
thanks for the video, i was really confused about the n=t/t1/2 formula i had before but this vid explained it at the end so thanks!
As a bio student, thank you for saving me. I literally hate the fact that my textbook often doesn't explain these concepts even if its nuclear physics.
My bro this is physics
@@sheehhdjejddj2730 its also bio if your doing medicine i think
"Silly Valve, It's not 'One, two, Alyx.' it's one, two, thirty-five!"
Ha! Funny
What an awesome video
With perfect explanation
Thank you.
you explain everything in such a clear way. this is the 3rd video i have watched about this subject and this is the first video that has actually helped me understand it thank you!!!
I always hear half life and I have no clue what it meant, this actually helps, Thank you so much! :D
People are probably referring to the game
wait... this isnt half life 1 walkthrough (No commentry) :(
You're literally the best teacher I have. Love your videos :)
Thanks Noah, really appreciate it 😊
BRO THE THING I COULDNT LEARN FOR MONTHS THIS GUY JUST TAUGHT ME THIS IN 5 MINS
I finally understand how to calculate half line on a graph ,thank you
thank you very much :) helped a lot
Thank you , super clear
is this how it feels like to finally understand something?? my physics mock is tomorrow and i keep forgetting the half life concept for some reason .... tysm wish me luck!
This really helped man god bless you fr
You’re welcome, good luck with all your work :)
this video just made half life surprisingly uncomplicated for me
bro wow i have an test tomorrow on this so thanks a lot
Thank you for the clear explanation. How do we calculate when the decay constant is given?
great videos! you presented everything in such a digestible way. thanks alot
Great video! I actually calculated the answer correctly at the end to my surprise. I ❤️ science!
same!
@@chloex971 I randomly wanted to learn about radioactive decay because of the Chernobyl series and also because of Fukishima and this video was really helpful.
sheesh this is very helpful thank you
Thank you so much 👏
Thanks for the vid :)
You are amazing, I finally understand this properly now.
Aha that’s greats to hear! Thanks for your support and good luck with all your work!
Omg thank you. You explained it much better than my physics teacher. Life saver!
GOOD LUCK FOR 2023 EXAMSSS
This is the only channel that I've actually turned on the notifications of!! Just understood this topic after my physics lesson this week!
Where's the 3 half life coming from in the question??
5 days x 24 hours =120 hours
40 hrs=1 half-life
number of half-lifes= 120/40= 3 half-lifes
this videos are so brilliant and clear - so easy to understand! deserve so many more subscribers, these videos are such a help.
Hey thanks for such a kind comment! Really happy to hear you’re finding them useful 🙌
OMG IVE BEEN STRUGGLING WITH THIS TOPIC FOR AGES IT JUST DIDNT MAKE SENSE AND THIS GUY JUST PRASED IT IN A WAY I JUST GOT IN 10 SECONDS I LOVE THIS MAN
Thank you SOO MUCH
Nice work😎
رحم الله والديك
How do i bhop?
I really hope all this knowledge I gain here helps me get a grade 8 in physics chemistry and biology and I'm able to do physics in a level as I want.
So helpful
thank you this is interesting
🤝thank you my friend
He is amazing brahh!!
rise and shine, mr freeman, rise and shine....
if it weren't for this video my GCSE score would've resulted in unforeseen consequences
would've been an anomalous material tbh
ut = Unit of time (e.g. days, weeks, etc) specified in question
uh = unit in hours (e.g. day = 24 hrs)
ut
__
uh
= how many half lives
p = how many half lives
3,000,00 ÷ 2^p
I'm a little late but what do I do if the amount of half lives are a decimal?
Thanks
easy to understand videos
So, if I had 1kg of a radioactive substance, and its activity was, say, 30Bq. If I had 20kg of it, would the activity be the same, or would it multiply by 20?
for the last question u can just do 3,000,000 divide by 40 multiplied by 5 for a shorter method
tysm 🙏
Could you make videos on astrophysics , electricity &waves (physics igcse)
thank youuu
3:09 those isotopes are REALLY distracting, it held my focus for a long time.
Great video though, helped alot :D
I never thought i would use cognito for things other than... you know... (nope you naughty naughty) eductaional purpose. Thank you Cognito so much.
clearly explained. Thank you
doctor freeeeemaaaan
Watch out for headcrabs guys, they can hide in very small places
But,instead of dividng the no. of nuclei by the no. of half-lives, we can just take the no. of half-lives as an index of 2, rght?
plz prepare the lesson for tunelling of alpha particle bcz i have a problem in this topic
I love you cognito man
How do you calculate a half life? Also thanks this video was very helpful!!
Becky Hiskyas Just look at the graph and find the time taken for half the nuclei to decay.
In the question at the end, I did (5/40) x 3,000,000
Which equalled the same answer, 375,000.
I don't know how my brain saw this as logic or how I did that but is this method also correct??
If my half live is a decimal number, is it okay to just divide the # of substance to the # of half lives directly?
Like if my half lives is 18.67
Are you trying to carbon date?
consider this video enjoyed.
who else came to see if it's a video about the half life game?