Half Life: GCSE revision

[@mikeunleashed1]

How i study physics: 1) watch DrPhysicsA video on topic 2) briefly go over stuff in text book and some stuff which may have been missed out 3) do questions with ease 4) celebrate

[@yaaseenjaulim6240]

me too xD

[@thomaskruse-nilsen7049]

Hi Dr P Just wanted to thank you for taking the effort to publish all your short lectures online. Absolutely a wonderful aid for a fellow in his 50´s trying to help his 3 children through high-school. Clear and concise. Wish I had this, back when…. Sterling effort. Thomas

[@JETwardCentrella]

I hope you intend to continue these videos! You are one of the best, if not THE best guiding teacher I have found on the internet, and your explanations are always incredibly clear. I can't thank you enough for the great job you do. Thank you so much!!

[@wearelengend]

By far the best at explaining physics anyone can understand this guy he's just wonderful I'm going to start downloading these vids so I can listen to them on the train

[@naughteedesign]

really enjoying these, although i have shit to do but keep putting that off to return to the physics lessons i ignored as a kiddy... thank you DrPhysicsA (and youtube)

[@jennhack8043]

Thank you so much. I am an Aussie parent just trying to help my kid with his half life experiment. Great revision for me

[@Georgeavery1999]

Sounds like Bruce Forsyth

[@mairajay7187]

This video is so helpful. I was meant to finish p2 ages ago but my teacher is quite slow so I have to learn this whole topic myself then start revising again and doing past papers. Thank you, you have made life so much easier for me! :)

[@Naimaknows]

ThankYou so much for this video! I have been struggling with half life for a few weeks now, and I was going through KZbin, but most of the other tutorials were so complicated! However I understood this! Thanks again! :)

[@kate___lynch]

So clear!!! I’ve been struggling with this topic a lot, thank you so much!!! 🙏🏻🙏🏻🙏🏻

[@Serdar54321]

"Is called a Becquerel, after Henri Becquerel who was the physicist who gives his name to this particular measure" :D haha. I like all ur videos, they are clear. Good job. I just would like u to do some derivations that u didn't do before (not for this video). Like "cosx+i.sinx=e^(ix)" for the wave equation (maybe I missed that).

[@biglmaoski9109]

I ALWAYS THINK IT'S MYCROFT HOLMES TALKING FROM SHERLOCK!!!!!!

[@mahmoudm451]

Oh so this actually means that we can create other elements from a certain isotope of an element!

[@padmaisonaroll8613]

You made half life crystal clear! Thankyou so much!

[@tjbrou4840]

Such awesome videos, so engaging and energetic! Just a question, do you know what Ionisation and Penetration Power is? I'm completely puzzled. Thank you

[@mahmoudm451]

you need to check the A level playlist videos for that.

[@deadalus1991]

This could be a little silly question, but what if we have left with one single radioactive atom there. Could we say that is going to decay after the half-life? I mean if it is only statistical measure, can we be totally sure?

[@DrPhysicsA]

deadalus1991 The half life only works when you have a large number of atoms. But even one atom will have a probability of decay.

[@tonmoykhan9676]

DrPhysicsA : When any radioactive nucleus decay...only part of its mass decreases.. So why would the overall mass becomes half after every half life?? Anyways thanks for all your amazing videos.

[@DrPhysicsA]

+tonmoy khan There are two distinct issues here. First, if we have 1kg of radioactive material, then after one half life we will have only 0.5kg of that material left - but the other 0.5kg (roughly) will constitute the radioactive decay products. Second there will be a much smaller mass loss associated with the energy emitted during the decay.

[@mmartinu327]

Half Life³

[@Jordan-sx6bb]

Haf loif

[@jennhack8043]

We used to call bequerels backrolls...yeah we were nerds lol😂

[@chrisjohn7848]

The guy sounds like the teacher of willy wonka and the chocolate factory

[@smojj8023]

Honestly thank you so much im going to get an A on my gcse now. :))))))))))))))))) this is all i need for my gcse right????

[@DrPhysicsA]

+Smojj I hope so. But as the title implies - this is a revision course not a substitute for a proper course of study.

[@siriusa4905]

+DrPhysicsA aha your videos have covered and explained more than any of my teachers have. I really want to do A level physics, I want to study astrophysics/physics in university. These videos have helped an amazing amount. I've always had bad teachers throughout my school life and now, with only 2 months left till the exams, these are lifesavers.

[@vanessaf98]

THANK YOU SO SO SO MUCH!!

[@DrPhysicsA]

Thanks. I hope it was helpful. And if you're taking an exam, all good wishes.

[@valera2010_cool]

Only 4 views? Really?

[@tahmidshams6240]

thank u it was helpful fir my igcse exam

[@karelaubun6089]

Amazing!

[@von_gabi]

briliant

[@TheSlamMiles]

i love you