Half-Life Calculations: Radioactive Decay

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  • Опубліковано 7 гру 2024

КОМЕНТАРІ • 446

  • @SteveRelentless
    @SteveRelentless 9 років тому +469

    I love when i go online and find a tutor thats high as fuck and teachs like a boss.

  • @sinekinematic
    @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.

  • @CosmicMomentumX
    @CosmicMomentumX 8 років тому +196

    Finals tomorrow anyone?

  • @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!!!!

  • @DaScribbler
    @DaScribbler 10 років тому +186

    Very enthusiastic.
    Enjoyable.
    Concise.
    I learned.

  • @SergioInzunza
    @SergioInzunza 9 років тому +44

    "Dont be a fool!" lol

  • @martinel9181
    @martinel9181 9 років тому +84

    dat intro

  • @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!

  • @lizwimbewu9024
    @lizwimbewu9024 11 років тому +22

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

  • @lotamole
    @lotamole 8 років тому +34

    This guy is a legend

  • @Abdihakim0512
    @Abdihakim0512 11 років тому +6

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

  • @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

  • @dougthepug5199
    @dougthepug5199 2 роки тому +4

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

  • @cosmeticnurseliz
    @cosmeticnurseliz 7 років тому +9

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

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

    rise and shine mr freeman

  • @WorldwideAthlete
    @WorldwideAthlete 6 місяців тому +1

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

  • @ElcoolMo
    @ElcoolMo Рік тому +1

    your still saving lives 10 years later

  • @luken6362
    @luken6362 7 років тому +1

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

  • @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

  • @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?)

  • @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!

  • @roberthart1336
    @roberthart1336 8 років тому +5

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

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

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

  • @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

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

    He's so excited its so cute

  • @Bandtx
    @Bandtx 10 років тому +1

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

  • @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

  • @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 :))))))))))))

  • @ThePanzerlancer
    @ThePanzerlancer 8 років тому +9

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

  • @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.

  • @eaindraykit
    @eaindraykit 9 років тому +5

    this saved my life 🙏🏻 chem test cram

  • @naledimothamane5651
    @naledimothamane5651 7 місяців тому

    This man just saved my semester, I appreciate you

  • @WestVision
    @WestVision 2 роки тому

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

  • @ElphasKiprop-j1e
    @ElphasKiprop-j1e Рік тому

    The real antidote of radioactivity calculation. Thanks alot sir.

  • @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!!

  • @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.

  • @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.

  • @motivationwithalii
    @motivationwithalii 5 років тому +2

    whos ready for finals this week?

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

    This guy teaches so much better than my actual school teacher

  • @connorvincent6287
    @connorvincent6287 8 років тому +12

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

  • @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.

  • @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)

  • @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

  • @beckseamons
    @beckseamons 2 роки тому +2

    chemistNATE absolute baller

  • @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?

  • @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!

  • @remo0075
    @remo0075 Рік тому +1

    Its been 10 YEARS woh!

  • @doug213
    @doug213 8 років тому +1

    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?

    • @doug213
      @doug213 8 років тому +1

      I found it. I know it as Please Excuse My Dear Aunt Sally for the order of operatiions. Thanks, by the way. Great video.

    • @chemistNATE
      @chemistNATE  8 років тому +2

      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 !

  • @justice873
    @justice873 8 років тому +2

    Wow did not expect the last part.

  • @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.

  • @tumelonkhabanyane7086
    @tumelonkhabanyane7086 Рік тому

    This man just single handedly saved my semester.😭🔥

  • @ladyinred396
    @ladyinred396 7 років тому

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

  • @tomm3103
    @tomm3103 2 роки тому

    I love this guys attitude

  • @jotarothanos9862
    @jotarothanos9862 3 роки тому

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

  • @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)

  • @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.

  • @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

  • @debbiemelinette4121
    @debbiemelinette4121 8 років тому

    your videos are better than any others

  • @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 😂

  • @Jastotz67
    @Jastotz67 11 років тому

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

  • @ChilangaBanda08
    @ChilangaBanda08 8 років тому +2

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

  • @maryamnaif9410
    @maryamnaif9410 5 років тому

    This is the best teacher ever!!!

  • @chrissealey7040
    @chrissealey7040 7 років тому

    John Malovich is teaching me halflife calculations!

  • @martyruth77
    @martyruth77 Рік тому

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

  • @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!

  • @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!

  • @aldrineusebio192
    @aldrineusebio192 10 років тому +3

    Without this Math Wizz..
    I'm totally insane..xD
    Thanks^^

  • @erhpin7796
    @erhpin7796 2 роки тому

    "Use BODMAS. Don't be a fool"
    I felt called out lmao

  • @Awesomeanne06
    @Awesomeanne06 3 роки тому +1

    the intro is giving vine energy

  • @ChefFarisMom3
    @ChefFarisMom3 4 роки тому

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

  • @deadchannel3484
    @deadchannel3484 5 років тому +6

    Half-Life:Decay
    For the PS2

  • @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?

  • @reaper7884
    @reaper7884 Рік тому +1

    You the best teacher 👑

  • @hussainkamran3955
    @hussainkamran3955 2 роки тому

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

  • @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?

  • @Vikash_Kumar8090
    @Vikash_Kumar8090 9 років тому +1

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

  • @SkyfalconTin
    @SkyfalconTin 9 років тому +1

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

  • @Nocturtle117
    @Nocturtle117 6 років тому +3

    Thank you so much. You're a fricking legend.

  • @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

  • @hussamskafi2598
    @hussamskafi2598 9 років тому

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

  • @lukeborges9444
    @lukeborges9444 5 років тому +1

    This guys the Goat 🐐

  • @Abhinay_Limbu
    @Abhinay_Limbu 2 роки тому +2

    I didn't know canon made calculators

  • @Streetmusicvk
    @Streetmusicvk 8 років тому +1

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

  • @aoliravioli
    @aoliravioli 5 років тому +2

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

  • @polk304
    @polk304 11 років тому +1

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

  • @adobegirl3761
    @adobegirl3761 9 років тому

    Strontium-90 has a halflife of 29 years. If there are 400 grams of strontium-90 initially, how much, to the nearest gram, will remain after 87 years?

    • @mxkhn
      @mxkhn 9 років тому

      juliya smith I believe its 50 grams

    • @sandeepshankwar8204
      @sandeepshankwar8204 9 років тому

      juliya smith I pretty sure answer would be 600 gm

    • @adobegirl3761
      @adobegirl3761 9 років тому

      i think the equation is Q = Q0 (1/2)^t/h, which got me 50 grams.

    • @rae7305
      @rae7305 9 років тому

      +Sandeep Shankwar 600 grams is more than the initial amount.

  • @khayyam3000
    @khayyam3000 5 років тому

    Brooooooooo!!!!! All Hail the King.. ChemistNATE!!!

  • @erikamadray35
    @erikamadray35 9 років тому

    Please disregard - I was using the wrong method to enter the exponent! Yay! Thank you, again chemistNATE!

  • @fgggggggable
    @fgggggggable 11 років тому +1

    love chem watching this cause i cant sleep

  • @aaronhoefling
    @aaronhoefling 9 років тому +1

    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.

  • @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

  • @mohammeduddin5461
    @mohammeduddin5461 5 років тому

    IT WAS SERIOUSLY THAT EASY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
    I SPENT HALF AN HOUR TO GET IT OUT AND ALL YOU HAD TO DO WAS TOO JUST PRESS IT :(
    Thank you so much!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! : )

  • @cardinal198
    @cardinal198 10 років тому

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

  • @peterellis731
    @peterellis731 7 років тому +5

    "Don't be a fool!" haha

  • @Be1smaht
    @Be1smaht 11 років тому

    emergency services because he is on fire with videos

  • @jacksonshui6167
    @jacksonshui6167 7 років тому

    Omg already better than my chem honors teacher

  • @seantan9793
    @seantan9793 6 років тому

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

  • @DynaHunt
    @DynaHunt 5 років тому +1

    See the problem is, I need to figure out the half life. I wasn’t given the half life

    • @sweetlove1754
      @sweetlove1754 4 роки тому

      The initial amount and the remaining amount must have been given do check it again