Half-Life Calculations: Radioactive Decay
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- čas přidán 11. 09. 2024
- MATH VIDEO. How to calculate how much of a substance remains after a certain amount of time.
ALSO: How to figure out how LONG it takes to decay to a certain amount (use logarithms!)
Check me out: www.chemistnate...
I love when i go online and find a tutor thats high as fuck and teachs like a boss.
Lmaoo
Fr
did this man sneeze because bless this man for helping me.
I know your 6 years late but bro its 2020 cant make those jokes nomo
😂😂😂
Bars
that happened ?! 😂
Funny
... and just like that, in 3 minutes, you did better than pages and hours of my chemistry book and lecture. Thank you!!!!
Finals tomorrow anyone?
Yup
even 2 years after
@@zayedalkulaib9678 Finals today lol
even 3 years later
yeah
Your explanations are great because you don't mention what the equations mean, you actually label them. Complete boss.
Very enthusiastic.
Enjoyable.
Concise.
I learned.
Nice Madotsuki pfp
"Dont be a fool!" lol
dat intro
man I so wish you were my lecture. you just make things seem so easy and understandable.
Thank you so much. Why can't my teacher just say this?
Because teachers also have nice degrees, and they want to feel good about their fancy degrees.
Because they don't truly understand the concept well enough to simplify it.
***** highly agree!
This guy is a legend
Your the man, You explain better than a million teachers with their videos
I watched several videos on this topic and this is by far the most clear and concise explanation I was given! Thank you so much for making this video!
I love watching 11 year old tutorials that still work and teach me chem simple
someone still watching in 2024 👀 same
This man just single-handedly saved me for my chemistry test today
you're killing me XD "yo just guess..I'm a math wiz fyi"
Please help. For the first problem. How come that
(.5^24.82758621=0.0000336?)
it's like the textbooks make it hard on purpose or something
I love how you point to the words and numbers. Great video. Very helpful
So glad I can go online and find a great explanation from 11 years ago
This guy is really goofy, but I like that, makes things interesting
He's so excited its so cute
This video helped me sooo much and I really like the way you teach definitely subscribing!
"use bedmas DONT BE A FOOL!!!"
hhaahahah made me laff (im sad)
Cheer Up! It's chemistry!
rise and shine mr freeman
Finished AP chem exam, still goes back to chemistnate for precalc help
your still saving lives 10 years later
Taught me half life calcs before my mid year exam, legend!!
After watching numerous videos, I was still lost! This is The Best and easiest way to calculate Half life problems!!! I finally got it, thank you!!
Maaaannn thank you so much i was finding easy way to teach my students and here i met you. Excited to go to class now. Thanks alot.
Even just the formula has saved my life, especially with the teacher never teaching this and proceeding to put it on the quiz :))))))))))))
God bless you Nate, had a test in 4 hours, and didn't know how to solve for exponents.
as for "don't be a fool.." and "I don't care" :v :v :v I enjoyed this tutorial
This man just saved my semester, I appreciate you
this saved my life 🙏🏻 chem test cram
Thank you so much for the formula, really appreciate that and I liked and shared it too. Only 8 days left for IGCSE physics exam,soooo.
whos ready for finals this week?
you are the greatest teacher i have ever seen. Im not even exaggerating.
This guy teaches so much better than my actual school teacher
chemistNATE, thank you so so much! I figured this out now, my teacher doesn't teach properly, but you solved my problem. Thanks again!
Wow, corny and bland jokes. But, literally the best explanation of half-life calculation I have seen... Great job Nate...
This is the best video on the topic. It uses the best formula and shows how to solve for the exponent with logs. Thank you so much.
"Use BODMAS. Don't be a fool"
I felt called out lmao
When i enter 1440 divided by 58 i get the answer 24.82758621. When you do it you don't seem to get he decimal point after 24. Also the later calculation you get the correct amount of zeros before the numbers start whilst on my CASIO fx-85GT calculator i get 3.358550105x10-8. I know what 10-8 means i just wondered if you could tell me how i get my calculator to give the answers in the same form as you get?
Mine is doing that too
The real antidote of radioactivity calculation. Thanks alot sir.
chemistNATE absolute baller
Takes one to know one
Got a question saying " The activity of a sample falls to 0.60 of its original value after 100s. Find the decay constant." What formula should i use? How would you answer that?
You da man!
------
Struggled for eternity on understanding this from my professors and teachers.
Learned it here in a little more than 8 minutes.
One like for this vid.
Thank you so much. I just watched this and am amazed about how my physics test is going to be made easier. May God bless you for me.
But how do you pinpoint the amount of primordial daughter and father isotopes?? Halflife per se is WORTHLESS!!
Isn't it easier to use the 0.693/k = (half-life), solve for K and then use the first-order rate law ln(At/Ao)= --kt ? Substituting k in Ao = initial amount and At = amount remaining. I used these for each problem and got the same answers. Maybe it's just me, but this way seems much faster and easier to solve. Anyone else prefer this method?
+Rachel Manno.I wud but i didn't really get what you said, can you do video on that?
+Rachel Manno All roads lead to rome, I prefer using logarithm just because I use it allot but I guess your method also works well.
+TheOomen2012 I understand and hope I didn't offend. I was just taught a different way and wanted to offer it up in case anyone else was struggling like me. I find that seeing alternatives sometimes helps me learn better. Thank you
@@rae7305 Sorry Rae.. His way is soooo much easier especially for those whom are a little weaker in the Math Department
Hi ChemistNATE and everyone,
Could you please help me with this following question
Radioactive materials are considered to be relatively safe when their activity has fallen below 0.1% of their initial value.
(a) How much half-lives does this take? (Answer = 10 half-lives)
(b) Plutonium-239 is a by product of nuclear reactors. Its half-life is 24 000 years. How long does the plutonium-239 have to be stored as nuclear waste before it is considered safe to handle? (Answer - 240 000 years)
I love you, thanks for telling us to work it backwards!!! Greetings from Houston, Texas..
Wow did not expect the last part.
This man just single handedly saved my semester.😭🔥
I need to find out the radioactivity of a certain isotope using the half-life and the mass. How in the heck do I do this? Nothing on the internet is helping me, and neither is this video.
Truly a one of a kind wizard, thank you wise stranger...
damn ! my physics teacher couldnt explain this to his class in two weeks, and u did it in 7 mins ! thanks!
I love this guys attitude
stg, this dude is gonna be getting me through my bioengineering degree
THANK YOU SO MUCH!!!! My teacher just handed these problems to us when we were leaving class!! Gotta Love Honors Chem.....(Sarcasm)
I didn't know canon made calculators
Roger, but how can we tell the half life in millions or billions of years? Nobody was there to see it.
QUESTION- does this work for all half life calculations? including second order reaction half-life?
First math Video that made me laugh !! XDDD Thanks for your energy and explanation. That was.... fun ? 0o
Without this Math Wizz..
I'm totally insane..xD
Thanks^^
thank you for the video. for these 7 minutes I understood more then from 3 weeks of lectures!!!
Bruh I have a science exam tomorrow and this is the only thing I don’t know
Its been 10 YEARS woh!
AWESOME DUDE. I have a prelim exam tomorrow and I had no idea how to do it until now.
"Don't be a fool!" haha
Half-Life:Decay
For the PS2
I am entering the same numbers etc into my calculator and i am coming up with different answers to you?
can you reverse calculate the half life if given that 20 % of a substance decays after a year?
you could just use the solve function in the calculator to find the t in the second problem. I assume your 10 canadian bucks calculator will have solve function as where i live in, almost every calculator do have the solve function if you know where to find it
I have an exam tomorrow and this video from so long ago helped😍
I don't even care tht he was a bit cocky anymore
I understood here out of all the other 10+ videos I watched
thanks nate!
*oh and yea exam in an hour!!!
Thank you so much. You're a fricking legend.
your videos are better than any others
how do you calculate how much time for a reaction to occur using half-life?
Could you not write h for half lives in the second question and then at the end multiply by 34 seconds, I think that would be less tedious. Great vid!
I love you you may have inspired me to get back into some math after a lot of bad teachers
Many many manyyyyyyyyyyyyyyy Thanks Sir... a lesson forgotten for so many years... thanks for making it easy for me...
yo chemisNate, thanks a lot for the problem 2 you showed. I was looking for it in the internet. gladly found it in your vid. thanks
I thought this was a trailer for a new Half-Life game. Then I saw the picture and realized Valve cant even count to 3.
so this video helps us find A, and also t, but is there a video to help find "h" or "Ao"
There is also A=Ao x e^( - decay constant x t )
See the problem is, I need to figure out the half life. I wasn’t given the half life
The initial amount and the remaining amount must have been given do check it again
okat this was very helpful but what if i have how much is left and im trying to calculate how long it has been
Please disregard - I was using the wrong method to enter the exponent! Yay! Thank you, again chemistNATE!
thank you very much...you have made me a master in solving half life problems.
Your way of explaining is so amazing and simple. Thank you
how do i solve for the number of half lives that have occurred... in other words, how to i solve for "h" in the equation given in the video?
Thanks for giving a easy way to check out half life 😊😊
This is the best teacher ever!!!
Thank you god! i understood a 2 hr lecture in7.4 minutes!! thanks!
ok, how was these hallife tables calculated for the substances?
Yeah... and the million dollar question (regarding Carbon14) How much was there at the time of death. There is no way of telling (unless the scientists have the ability to time travel)
THANKKKK YOU SO MUCH SAVED ME ALOT ! Haha i laughed when you said you're a math Wiz !
You said "use bedmis don't be a fool"? Your remark was made at 3:30 in your video. I'm assuming that is an acronymn? Would love to know what it means?
I found it. I know it as Please Excuse My Dear Aunt Sally for the order of operatiions. Thanks, by the way. Great video.
Yeah man, I've heard that here in Canada we use BEDMAS (brackets, exponents, division, multiplication, addition, subtraction) but others use P for parentheses, etc. Thanks for commenting that here, I'm sure it'll help someone else !
This was going so smooth until he started pulling out log, and my teacher told us we aren't allowed to use log in grade 11 D:
Maybe I'll just skip that question on the exam tomorrow...