GCSE Physics - Radioactive Decay and Half Life #35

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 Biology Playlist:

GCSE Physics Playlist:

#9-1

[ellamcdougall]

this guy taught me more in 6 minutes than my physics teacher can in a week

[DT]

its gotten to a point where people need to specify which half life they're talking about

[isabellaaslam]

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 :) )

[shrividyatavanam]

Alright, this guy is too underrated!! Push him to the top please, he deserves it!

[Parky]

Where’s the funny screaming scientists and silly Star Wars lookin aliens?

[amnababar]

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 👍💞

[adventurelinetm.]

Gordon doesn’t need to hear all this. He’s a highly trained professional!

[CeNNteR]

Gordon doesn't need to hear all this, he's a highly trained professional

[fizastudies]

honestly these videos are a lifesaver. And thats the biggest understatement!! Love your channel

[RecklessRat]

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

[wumbr]

Rise and shine Mr. Freeman... Rise and shine...

[staceixan]

gordon freeman is a highly trained professional!

[daf_eed]

teaching myself chem bio and physics so thank you for explaining everything - I’ve recommended u to basically everyone Ik

[dec]

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

[lil_thiccpeach]

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<3

[jahnavi_]

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.

[heisenberg]

i see where the half life decay dlc got its name from

[Naeem-ur-RehmanNaqvi]

wait... this isnt half life 1 walkthrough (No commentry) :(

[alisonmurchie]

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!

[TheUltimateSpider_Man]

All i can image is a scientist escaping a facility called black mesa