Half-Life Calculations: Radioactive Decay

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  • Опубліковано 6 гру 2024

КОМЕНТАРІ • 446

  • @SteveRelentless
    @SteveRelentless 9 років тому +468

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    @sinekinematic 11 років тому +408

    did this man sneeze because bless this man for helping me.

  • @zayedalsuwaidi7697
    @zayedalsuwaidi7697 8 років тому +44

    Your explanations are great because you don't mention what the equations mean, you actually label them. Complete boss.

  • @blackberryhedge
    @blackberryhedge 9 років тому +35

    ... and just like that, in 3 minutes, you did better than pages and hours of my chemistry book and lecture. Thank you!!!!

  • @CosmicMomentumX
    @CosmicMomentumX 8 років тому +196

    Finals tomorrow anyone?

  • @DaScribbler
    @DaScribbler 10 років тому +186

    Very enthusiastic.
    Enjoyable.
    Concise.
    I learned.

  • @lizwimbewu9024
    @lizwimbewu9024 11 років тому +22

    man I so wish you were my lecture. you just make things seem so easy and understandable.

  • @martinel9181
    @martinel9181 9 років тому +84

    dat intro

  • @mikaylawashington1489
    @mikaylawashington1489 2 місяці тому +1

    Been through tons of vids and this one finally helped me without all the other complicated stuff good work lol

  • @Jessie-bx8xc
    @Jessie-bx8xc 6 місяців тому +2

    I love watching 11 year old tutorials that still work and teach me chem simple

    • @GeGeLimited
      @GeGeLimited 6 місяців тому

      someone still watching in 2024 👀 same

  • @Abdihakim0512
    @Abdihakim0512 11 років тому +6

    Your the man, You explain better than a million teachers with their videos

  • @Bluelagoon808
    @Bluelagoon808 11 років тому +81

    Thank you so much. Why can't my teacher just say this?

    • @semir2607
      @semir2607 10 років тому +6

      Because teachers also have nice degrees, and they want to feel good about their fancy degrees.

    • @OfMiceAndCody
      @OfMiceAndCody 10 років тому +25

      Because they don't truly understand the concept well enough to simplify it.

    • @lorodz
      @lorodz 10 років тому +3

      ***** highly agree!

  • @catherinehall9526
    @catherinehall9526 3 роки тому +4

    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!

  • @WorldwideAthlete
    @WorldwideAthlete 6 місяців тому +1

    So glad I can go online and find a great explanation from 11 years ago

  • @whoooooo5647
    @whoooooo5647 Місяць тому +1

    THANKYOUUUUU SO MUCHHHH!! I've been struggling with this because I need someone to like explain every step by step and guess what?? YOU JUST DID IT. Thankyouuuu

  • @Dr.StompYT
    @Dr.StompYT 3 роки тому +4

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    @lotamole 8 років тому +34

    This guy is a legend

  • @ElcoolMo
    @ElcoolMo Рік тому +1

    your still saving lives 10 years later

  • @SergioInzunza
    @SergioInzunza 9 років тому +44

    "Dont be a fool!" lol

  • @dougthepug5199
    @dougthepug5199 2 роки тому +4

    This man just single-handedly saved me for my chemistry test today

  • @Ks-ly6ov
    @Ks-ly6ov 2 роки тому +2

    I love how you point to the words and numbers. Great video. Very helpful

  • @luken6362
    @luken6362 7 років тому +1

    Finished AP chem exam, still goes back to chemistnate for precalc help

  • @moon.cat.
    @moon.cat. Рік тому

    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!!

  • @naledimothamane5651
    @naledimothamane5651 7 місяців тому

    This man just saved my semester, I appreciate you

  • @alamjottiwana3650
    @alamjottiwana3650 10 років тому +1

    God bless you Nate, had a test in 4 hours, and didn't know how to solve for exponents.

  • @roberthart1336
    @roberthart1336 8 років тому +5

    Taught me half life calcs before my mid year exam, legend!!

  • @cosmeticnurseliz
    @cosmeticnurseliz 7 років тому +9

    it's like the textbooks make it hard on purpose or something

  • @apothe6
    @apothe6 Рік тому

    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.

  • @connorvincent6287
    @connorvincent6287 8 років тому +12

    This video helped me sooo much and I really like the way you teach definitely subscribing!

  • @rithamassawe310
    @rithamassawe310 3 роки тому

    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.

  • @WestVision
    @WestVision 2 роки тому

    you are the greatest teacher i have ever seen. Im not even exaggerating.

  • @tfoprincess
    @tfoprincess 8 років тому +25

    you're killing me XD "yo just guess..I'm a math wiz fyi"

    • @rollyespartero4990
      @rollyespartero4990 6 років тому

      Please help. For the first problem. How come that
      (.5^24.82758621=0.0000336?)

  • @Bandtx
    @Bandtx 10 років тому +1

    This guy is really goofy, but I like that, makes things interesting

  • @ElphasKiprop-j1e
    @ElphasKiprop-j1e Рік тому

    The real antidote of radioactivity calculation. Thanks alot sir.

  • @nightmarionnefury5516
    @nightmarionnefury5516 4 роки тому +1

    Even just the formula has saved my life, especially with the teacher never teaching this and proceeding to put it on the quiz :))))))))))))

  • @justice873
    @justice873 8 років тому +2

    Wow did not expect the last part.

  • @binderpalkaur9753
    @binderpalkaur9753 5 років тому +3

    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.

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    @eaindraykit 9 років тому +5

    this saved my life 🙏🏻 chem test cram

  • @vikramkulkarni3928
    @vikramkulkarni3928 5 років тому +1

    chemistNATE, thank you so so much! I figured this out now, my teacher doesn't teach properly, but you solved my problem. Thanks again!

  • @HellenaAchieng
    @HellenaAchieng 8 місяців тому +1

    0.51...the idrc had me
    3.33...use BODMAS, don't be fOOl
    5.36...im also a math whiz fyi
    It's 2024, best teacher ever 😂

  • @moonhq.medhat8825
    @moonhq.medhat8825 7 років тому +9

    He's so excited its so cute

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    @debbiemelinette4121 8 років тому

    your videos are better than any others

  • @BassKicker48
    @BassKicker48 11 років тому

    THANK YOU SO MUCH!!!! My teacher just handed these problems to us when we were leaving class!! Gotta Love Honors Chem.....(Sarcasm)

  • @cubajunior5832
    @cubajunior5832 3 роки тому +1

    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.

  • @jotarothanos9862
    @jotarothanos9862 3 роки тому

    Truly a one of a kind wizard, thank you wise stranger...

  • @ladyinred396
    @ladyinred396 7 років тому

    thank you for the video. for these 7 minutes I understood more then from 3 weeks of lectures!!!

  • @daevardone08420
    @daevardone08420 11 років тому

    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.

  • @Akin_-ke6oz
    @Akin_-ke6oz 3 роки тому

    This guy teaches so much better than my actual school teacher

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    @tumelonkhabanyane7086 Рік тому

    This man just single handedly saved my semester.😭🔥

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    @robertward-dd6ir Рік тому +1

    thank u sir i learnt a lot

  • @ChefFarisMom3
    @ChefFarisMom3 4 роки тому

    Many many manyyyyyyyyyyyyyyy Thanks Sir... a lesson forgotten for so many years... thanks for making it easy for me...

  • @remo0075
    @remo0075 Рік тому +1

    Its been 10 YEARS woh!

  • @tungstenejector
    @tungstenejector 10 років тому +6

    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?

  • @Nocturtle117
    @Nocturtle117 6 років тому +3

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  • @tomm3103
    @tomm3103 2 роки тому

    I love this guys attitude

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    @aldrineusebio192 10 років тому +3

    Without this Math Wizz..
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    Thanks^^

  • @zacharymansell3674
    @zacharymansell3674 2 роки тому

    I love you you may have inspired me to get back into some math after a lot of bad teachers

  • @sheffyr5724
    @sheffyr5724 8 років тому

    damn ! my physics teacher couldnt explain this to his class in two weeks, and u did it in 7 mins ! thanks!

  • @Streetmusicvk
    @Streetmusicvk 8 років тому +1

    thank you very much...you have made me a master in solving half life problems.

  • @reaper7884
    @reaper7884 Рік тому +1

    You the best teacher 👑

  • @cardinal198
    @cardinal198 10 років тому

    Your way of explaining is so amazing and simple. Thank you

  • @Tina93_
    @Tina93_ 7 років тому

    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

  • @Jastotz67
    @Jastotz67 11 років тому

    AWESOME DUDE. I have a prelim exam tomorrow and I had no idea how to do it until now.

  • @maryamnaif9410
    @maryamnaif9410 5 років тому

    This is the best teacher ever!!!

  • @beckseamons
    @beckseamons 2 роки тому +2

    chemistNATE absolute baller

  • @Vikash_Kumar8090
    @Vikash_Kumar8090 9 років тому +1

    Thanks for giving a easy way to check out half life 😊😊

  • @hussainkamran3955
    @hussainkamran3955 2 роки тому

    I have an exam tomorrow and this video from so long ago helped😍

  • @rae7305
    @rae7305 9 років тому +5

    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?

    • @huntersikari
      @huntersikari 9 років тому

      +Rachel Manno.I wud but i didn't really get what you said, can you do video on that?

    • @TheOomen2012
      @TheOomen2012 8 років тому +1

      +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.

    • @rae7305
      @rae7305 8 років тому +1

      +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

    • @khayyam3000
      @khayyam3000 5 років тому

      @@rae7305 Sorry Rae.. His way is soooo much easier especially for those whom are a little weaker in the Math Department

  • @DONphantasmo
    @DONphantasmo 4 роки тому

    Wow, corny and bland jokes. But, literally the best explanation of half-life calculation I have seen... Great job Nate...

  • @courtneymaudena-pelkey9343
    @courtneymaudena-pelkey9343 7 років тому

    Thank you god! i understood a 2 hr lecture in7.4 minutes!! thanks!

  • @chrissealey7040
    @chrissealey7040 7 років тому

    John Malovich is teaching me halflife calculations!

  • @ThePanzerlancer
    @ThePanzerlancer 8 років тому +9

    "use bedmas DONT BE A FOOL!!!"
    hhaahahah made me laff (im sad)

  • @tungstenejector
    @tungstenejector 10 років тому +1

    I am entering the same numbers etc into my calculator and i am coming up with different answers to you?

  • @hussamskafi2598
    @hussamskafi2598 9 років тому

    There is also A=Ao x e^( - decay constant x t )

  • @ChilangaBanda08
    @ChilangaBanda08 8 років тому +2

    I love you, thanks for telling us to work it backwards!!! Greetings from Houston, Texas..

  • @gabrielionescu2963
    @gabrielionescu2963 5 років тому

    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?

  • @tadeolemu8375
    @tadeolemu8375 2 роки тому

    Thank you my guy for explaining. It truly helps a lot!

  • @SkyfalconTin
    @SkyfalconTin 9 років тому +1

    how do you calculate how much time for a reaction to occur using half-life?

  • @jz1946
    @jz1946 Рік тому

    Thank you so much sir, I felt lost earlier but this really helped me

  • @motivationwithalii
    @motivationwithalii 5 років тому +2

    whos ready for finals this week?

  • @martyruth77
    @martyruth77 Рік тому

    stg, this dude is gonna be getting me through my bioengineering degree

  • @Malithhetti
    @Malithhetti Рік тому +1

    THANKS ALOT!

  • @polk304
    @polk304 11 років тому +1

    QUESTION- does this work for all half life calculations? including second order reaction half-life?

  • @StarSunYT
    @StarSunYT 6 років тому

    Thank you so much! This formula is the best!

  • @thapeloseanego318
    @thapeloseanego318 9 років тому +20

    as for "don't be a fool.." and "I don't care" :v :v :v I enjoyed this tutorial

  • @seantan9793
    @seantan9793 6 років тому

    can you reverse calculate the half life if given that 20 % of a substance decays after a year?

  • @michaelcarrick5413
    @michaelcarrick5413 4 роки тому

    okat this was very helpful but what if i have how much is left and im trying to calculate how long it has been

  • @anayavij
    @anayavij 5 років тому

    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!!!

  • @benjaminvenegas800
    @benjaminvenegas800 8 років тому

    THANK YOU SOOOO MUCH! BEST VIDEO I HAVE Found ONLINE!!!! YOU SAVED MY LIFE❤️❤️

  • @iiBleedMusic
    @iiBleedMusic 6 років тому

    You made this very easy to comprehend. Thank you!

  • @leighannefish6309
    @leighannefish6309 9 років тому +1

    would it be a log or ln? Ive seen others use a ln and not a log

    • @safiaali4839
      @safiaali4839 9 років тому +2

      +Leigh Anne Fish log and natural log are basically the same log uses base of 10 and ln uses base of e but same answer

  • @kabanowster
    @kabanowster 11 років тому

    ok, how was these hallife tables calculated for the substances?

  • @Abhinay_Limbu
    @Abhinay_Limbu 2 роки тому +2

    I didn't know canon made calculators

  • @elizahlakao5539
    @elizahlakao5539 2 місяці тому

    you are so funny and your video is really helpful, your video just helped me with the doubts that i have .

  • @huyanhle
    @huyanhle 2 роки тому

    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)

  • @aoliravioli
    @aoliravioli 5 років тому +2

    Bruh I have a science exam tomorrow and this is the only thing I don’t know

  • @leonharddamianindraadiguna4499
    @leonharddamianindraadiguna4499 7 років тому +1

    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

  • @AcireZerimar
    @AcireZerimar 10 років тому

    Thank you, thank you, thank you for your clear and straight to the point explanations!

  • @narutolearner
    @narutolearner 8 років тому +1

    how do you solve for the half life?

  • @cristianalcantar5490
    @cristianalcantar5490 4 роки тому

    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?