Radioactivity, Half-Life & Inverse Square Law - GCSE & A-level Physics (full version)

[@ericsonofjohn9384]

If you’re not doing maths a level but are doing physics, you have my sympathies

[@abood8858]

:(

[@CubicleComa369]

Abdallah Al Shacker y tho

[@patrickduke2826]

Eric Jeffrey thanks

[@artificialintelligence8328]

I'm not going to lie to you about your chances, but...

[@tunnelvision7906]

Yeah people who done as are gonna be in for a surprise for yr 2 content

[@AndrewThomas2000]

your probably single handedly the reason why i'm not failing physics btw

[@taladiv3415]

Your mathematic explanation about deriving the decay formula was clear and helpful. Thank you.

[@dulapiip]

Today is the 6th of Jan, 1am. My A levels are this month, first exam ph4 is on 7th and ph5 on 16th(with other exams in between). I didn't finish ph4 particle physics & capacitors even two days before, but watching your vids i finished them all and am prepared for the exam tomorrow. watching Ph5 now because that's in shit shape as well but im fixing things up and your vids are 60% of the reason why i can. Man, bless you and thank you. You're saving lives here.

[@izzashahid6427]

how did it go

[@user-ji8br3dl9s]

@@izzashahid6427 good

[@R1hham]

@@user-ji8br3dl9s lmao

[@FaraisWorld]

These Videos are literally saving my A level. Thank you very much!!!!!!

[@olly_evans]

A-Level 8:15

[@alihamas1841]

Thanks bruv

[@Yeneney]

This was actually ridiculously helpful THANKS SO MUCH!

[@lordnishant]

And bob's your uncle.

[@AB_3001]

Glad I'm not the only one who heard that lol

[@afrokaioty]

Thanks for making great videos , you’re the reason I got a grade 1 in Unit 1 CAPE, unit 2 exams are coming up!

[@amanamin3685]

I take maths and the maths in physics was always troubling me , mainly cuz we have alot of non math students in our class and it makes sense we don't study derivation of many equations, thx alot for this video, cleared up alot of things

[@Szat1]

👍👍 markscheme notes on point 👍👍

[@Szat1]

Respect for your videos 🙌🙌

[@rafathchowdury1968]

What you mean

[@mussaratjabeen4991]

Thank you so much. You are so good. Thank you for saving my life

[@nomadactual2484]

6:38 HALF LIFE 3 CONFIRMED!!!!!!!!!!!!!!!!!

[@zekion.]

Thanks a lot dude, this saved my O levels!!

[@hanalee2893]

3 days. 3 topics.

[@joshwheel2105]

hana lee good luck to us all

[@waleedmuhammad1484]

rookie numbers

[@robinghoshal6771]

it doesn't sound so bad when you put it like that lol

[@blackham7]

This comment aged fast now its 24 hours. 3 topics. Lmao

[@JuicyYoshiMemes]

9 hours 4 topics lmao

[@gecko2023]

Thanks mate, needed the equations that aren’t on the equation sheet

[@ferenczhucker4561]

PCN level 2 radiography exam, brings back some memories, also the headaches, 😂 😂 😂

[@shahmirmohammad]

You helped alot but I got sleeping watching this

[@hadiatariq1457]

thankyou they r very helpful but the sound of sharpi rubbing on paper is VERY itchy please change the pen if possible

[@asifirfan5232]

what is the difference between activity and count rate?

[@quantumfellow9587]

the only thing I can think of to add is in the definition of a half life is its the mean time taken for activity of an isotope to halve, right?

[@f1ibraaa]

your videos are the best but what about nuclear radius and nuclear density?

[@dilprotiva2992]

Take all my love and respect🥰🥰❤

[@Ben-wm3cm]

every time he says source, i hear sauce so i just imagine eating alpha and beta radiation sauce 😂

[@krelcic]

7:33 someone is hungry :)

[@wiktorblaszczynski7270]

Good video very helpful but didn't cover everything we did in y12 such as carbon dating or % calculations can you do one on that aswell?

[@ashwinprabaharan5532]

if you took away the back ground count surely u have to add it back on to the 7.5 to find the activity counted

[@xenoclops756]

no because u wanna find the activity of the sample after 4 half lives, so when youre given the background activity + sample activity initially you just want to find the initial sample activity. thats why its 145-25= 120Bq

[@eddieestcourt215]

How do u work out the radius of a nuclei? isnt it in the exam

[@animal_lore00]

can you provide some practise questions

[@Seby438]

At 8:02 would you not add the background radiation at the end?

[@adamali1165]

No Bcos it asks for the activity of the isotope not the total count

[@kran3591]

at about 16:00 why is the area of the curcle 4Pir^2? I feel stupid snd thst it should be obvious but its really annoying me and I can't figure it out

[@ScienceShorts]

Surface area of a sphere, not circle.

[@cleomorris9725]

At 15:55 why is the area of the whole circle 4 pi squared? Thank you so much for the videos they're absolutely amazing :)

[@ScienceShorts]

Area of a *sphere*

[@faizanhaider1737]

R these videos for AS level aswell?

[@lewisholmes2809]

Do you drag race?

[@Cardifyz]

For AQA do we need to know the derivations?

[@ScienceShorts]

+Cardifyz Nope!

[@Cardifyz]

Okay thanks, not that it's a problem , I find them fun to derive :D

[@rostedchikeenn]

for ocr do you need to know the derivation?

[@jordanvanderkris7386]

moist yute

[@Aeryix]

yoist mute

[@rushvi1611]

thank you, but intensity similar/same to activity?

[@ScienceShorts]

Not activity, but measured count rate, yes.

[@rushvi1611]

@@ScienceShorts ah thank you, but aren't both activity and count rate measured in bq. In my text book it uses the intensity equation k/x^2 with figuring out the the change in bq (like the radiusx2 thus the bq/4) that's why i am a bit confused with them. thank you for replying so quickly

[@erdiasilioglu]

1-How many atoms and grams of 90Y are in secular equilibrium with 50 mCi of 90Sr? 2-How many MBq of 132I (T1/2 = 2.3 hours) should be ordered so that the sample activity will be 500 MBq when it arrives 24 hours later?

[@raneemhanif3993]

Idk bro you tell me

[@kishan4524]

at 8:05 dont you have to add 25 again

[@joshwheel2105]

Kishan45 no because that’s not to do with the activity given out by the rock itself, which is what you’re calculating

[@kishan4524]

@@joshwheel2105 ok

[@Safxcu]

3/6/24, p2 exam is 6/6/24, wish me luck. I didn't revise enough for this icl. If someone replies back to this in like a year I'll reply with my results

[@jamie_robertson3114]

Pov your a GCSE student that watched through all the alevel stuff just to get confused

[@Ireadabook]

I wonder are captions on KZbin done by a person or a computer

[@Maria-pl7zx]

Hello❤️ Is it possible to get your email for classes?

[@aceleraupmimster]

did anyone else hear the dog at 2:10

[@lyaeusv3828]

Half life 3 confirmed

[@isabellecrabbe9992]

Fab!!

[@h027s]

13:55

[@sofiatrojanovich4413]

i'm in US, what does A-level mean?

[@ScienceShorts]

For you, AP.

[@Imaginose]

If something has a halflife is 5 days how is there any left?.

[@dedhed1017]

Ey yo what does that game half life have to do with radiation..?

[@dedhed1017]

*this is a joke*

[@outindifferent]

@@dedhed1017 thanks for explanation dedhed1017

[@Benjamin-nr8mj]

who is bob? and why is he my uncle?

[@R0Z3MVRY]

"Half" was initially spelt correctly, sir. "Halve" is written with an "s" at the end to indicate the plural form of half.

[@ScienceShorts]

You are wrong. Source: I speak English.

[@R0Z3MVRY]

@@ScienceShortsuhm. . that's a first.. Will check it out

[@ScienceShorts]

It's the verb innit.

[@R0Z3MVRY]

@@ScienceShorts thanks for the correction

[@leonardowilhelmdicaprio999]

Halve (Verb)-To create two parts of equal size. Half (Noun), Halves (Plural) - Either of two equal or corresponding parts into which something is or can be divided.

[@scenzonhain3815]

Is this his real voice??

[@ScienceShorts]

Why wouldn't it be 😂

[@scenzonhain3815]

@@ScienceShorts cuz...well you have a Deep voice amazing

[@masonfuller7848]

2022 a levels anyone?

[@thomaskeig_]

HELLO! cramming for tomorrow?

[@masonfuller7848]

@@thomaskeig_ always

[@h3adsh0t2]

Bob is not my uncle

[@b0ls.]

Sounds so Ill wtf

[@Tea-uw9dv]

Maybe try to write more neatly ???!!

[@ScienceShorts]

Begone