Disc/Washer Method vs. Shell Method (rotated about different lines)
Vložit
- čas přidán 26. 04. 2020
- Volume of Solid of Revolution rotated about different lines. Disc method vs. shell method for calculus 1 or AP calculus students.
Visit my site for the file and the answer key: blackpenredpen.com/calc1
If you enjoy my videos, then you can click here to subscribe czcams.com/users/blackpenredpe...
My math T-shirts & hoodies: teespring.com/stores/blackpen...
twitter: / blackpenredpen
Instagram: / bprp_merch
Patreon: / blackpenredpen
Hope this helps with your calculus 1 or AP calc
Time stamps:
a) area of the region, both vertical and horizontal rectangles 0:06
b) rotate about x-axis, 5:58
c) rotate about y-axis,15:16
d) rotate about x=5, 21:51
e) rotate about y=3, 30:56
This is not a difficult questions...I know better then you
@@al-quran9845 No, it doesn't work that way... stop saying this that's nonsense.
Mathematician Way Don't be an asshole. This isn't about whether it's easy or not. It's a video meant to help calculus students who are struggling, it's obviously not meant for people such as yourself.
CAN U DO WITH X=3 ALSO??
Where's the polar rotation ?
You sign up to a college only to learn it from CZcams. It makes sense. Thank you.
I’ll be doing the same
Wait you learn this in college isn't this a high school course?
@@78anurag this subject is generally learned at either the end of Calc 1 or beginning of Calc 2, or both, but this just depends on what calc 1 and 2 course you took. But people still take calc 1 in college, so it would make sense either way to be learning this in college
@@jamesarnold3286 I learnt this in Calc 1
fuck me too and im doing that 2am :)
I love how passionate he is when he’s doing maths
Ik it’s making me happy how happy he is
This is the only person who’s even come close to being able to explain shell method in an understandable way
This man may have taken the GOAT throne. No shade to The OChem Tutor or Sal Khan (they're both great and have done a lot for me), but NO ONE has been able to teach me washer method until this man. Thank you Blackpenredpen.
ochem did
this man just taught me three weeks' worth of class in under an hour. That's crazy
If this guy didn’t exists, I would fail all of my calculus courses.
haha
free Israel
A washer is a thin plate with a hole (typically in the middle) that is normally used to distribute the load of a threaded fastener, such as a bolt or nut.
en.wikipedia.org/wiki/Washer_(hardware)
Panos Triantaphillou omg, thank you! I always thought it as the washing machine washer lol.
Yes, _"Washer method"_ is not after someone's name. But we may suppose it is *not* related to _"washing machine"_ as in _"washer"_ , a person or device that washes something, and as in _"wash"_ verb, clean with water and, typically, soap or detergent.
It is more related to _"washer"_ , a *flat ring* fixed under a nut or the head of a bolt to spread the pressure when tightened or between two joining surfaces, since we subtract a smaller disc from a bigger disc, we got a *washer disc* or flat ring. Do you gents agree?
@@alexdemoura9972 It makes a lot of sense, must be because of this.
I actually laughed out loud when he said washing machine, i thought he was joking lol
May I ask.. Is circular ring method and washer the same?..
I cannot express enough my gratitude for your videos! I struggled to conceptualize washers/disks and shells, but with your thorough explanations, I could tackle these questions with ease. Thank you!
I am glad to hear. Cheers!!
Yes, thank you, we skipped all of this because of the pandemic in my calc class
Great video! I love all the CZcamsrs making math more easily understood. Just a point of clarification... "Washer" refers to a fastener used in combination with a bolt and nut, not a washing machine.
Omg, that washer?!
I always thought that as the washing machine washer lol
I really appreciate that you dive deep into simple questions to ensure the fundamental understanding of the topic.
I can't believe that a few years ago I watched your channel, and I had no clue what all those hieroglyphs were on the whiteboard, And now I'm watching your videos for an explanation! keep up the amazing work, I love your videos! thanks!
Thank you for using the same two functions for the different examples, I hate when some videos try to explain the different rotations but pick a bunch of different functions for each method and rotation, this makes it crystal clear to understand the fundamental concepts without having to rewatch or pause a lot.
Hands down best video about this on CZcams.
Subbed! :)
You made this so easy to understand. Up until this point I did not really understand these methods at all but now I actually understand what I'm doing. Thanks!
You are a king! You explained chapter 7.2 of the Stewart Calculus textbook in 30 mins. Thank you sir!
A great help visualizing when online classes don't do nothing!
This video needs to be the first thing lectures show to their students 🤣🤣🤣Very much descriptive and straight to the point, it even helps train the mind how to visualize the solids of revolution. Keep up the good work 🙏🙏🙏
I really appreciate your enthusiasm. You breaking it down like this really shows how easy it is. Thank you so much :)
i've never commented on a youtube video before, but dude i was depressed at my final exam week and you made my day with your smile. thank you! keep doing it. you are amazing at your job.
Ever since The Organic Chemistry Tutor started paywalling his videos, I've been struggling in math. Thank you for this.
i thought i would never find someone like him, but guess what i just found the one BLACKPENREDPEN
bro you dont understand how much i love your explaining and the way you teach, ive never thought id give props to a tutor on youtube but you are levels beyond anyone else on youtube teaching
One of the best instructors I have had help me practice Calculus. Thank you for your videos
this has been a great help to actually understand the concept, i am very thankful for this video my good sir
Learned this like 2 years ago and watched the whole thing anyways for a refresher lol good video
Haha same. I didn't get a full grasp of learning this but it was really fun. Everything in previous math used for calculus. Can't believe I thought it was generally difficult.
man i'm brazilian and my classes were suspended due to the covid-19 pandemic, your classes have helped me a lot, here we see this in calculus 2 continue with this incredible work and may god bless you
kkkkkkk br realmente ta em todo lugar
Acompanho esse canal desde que comecei a estudar matemática direito hue
Isso aí é cálculo 2?
@@andrewcarvalho9158 sim mano, calculo de volume de solidos usando integral
@@andrewcarvalho9158 Eu vi em cálculo 1 mesmo
you can really see how passionate he is for teaching math through this video. great work, keep it up!!
I appreciate that!
Thank you for your time. If it wasn't you I would have not understood all these. *Highly appreciated from South Africa*
I love you, seriously.
You've helped me so much through college
Clean explained everything without any confusion give me a lot of concept without questioning answering
Thank you for your service, good sir. You make the best videos for understanding calculus. Great teacher, you convey the info quickly and concisely enough that my attention doesn't drift lol.
I have a test about this today. The video recomendation was brilliant i think im ready now for it. Thank you Blackpenredpen.
this is so much more clearer than what my teacher had taught me. thank you!
he somehow made me smile doing math! such a kind and clear teacher, thank you for these lessons!
😃
I was able to understand the concept thanks to you 🙏
you have my respect sir. i now have the full understanding of shell and washer method because of you.all thanks to you sir
God Bless his soul. He just saved me for my test tomorrow. Thank you for your service sir.
One of his best videos for sure!
this video helped me a lot today was my class and hardly understand anything you helped me thanks!!
I'm blown away that this much visual clarity on volumes of solids of revolution came from a video without some 3D graphics computer program involved. Loved the vid/thanks for making this!
This is probably one of the best, if not the best, ways to learn maths. Fantastic video!!
Glad to hear. Thanks.
This was a very well explained video. I was not able to do it on my own until this video.
Thank you, I learned a lot. Keep up the good work. Support here from the Philippines.
Wonderful!! I was struggling to understand the topic
But you make it easy, I tackle questions from any angle
Your explanation is Amazing .
Thank you. I am glad to help.
Man, I really love this guy!
Thank you for explaining this!!
You just saved me 25% of my whole semester, thank you!!
Thank you so much for creating these content. I have been failing my Calc BC class until I watched your videos :)
Just in time for my AP calc exam. Thank you very much
You are such a genius ,i didnt this topic was this simple❤🙌
I blanked out for 2 hours trying to learn this in class and fully understood you in less time. Thank you so much!
Mr.blackpenredpen you are the goat!!!!!!!!!!!!!!!!!!!!!!!
Thank you. It really helped me
Great lesson! he makes it very very clear!! Thanks for your lesson!
You are a life saver my man!
That was very well explained! Thank you!
This video is incredibly good.
Very good presentation
I understood very well
Thank you so much sir! This is what im looking for, explaining the concept and derivation of the formulas especially area and volume .
From the philippines
you were oddly entertaining and instructive I learned a lot thank you
this man draws better than my professor at Purdue
Hahha. I will come back and verify this comment after next fall😎👏
Thank you so much, the book explanation is difficult to grasp.
you just saved my math grade! THANK YOU!!!
this video is very useful and helped me a lot! wishing the best for you 🥰🙏❤
This helped so much, thank you
You made me so much happy. I could not describe in words because my English is so poor. Thank you dude.
i was having a hard time reviewing my instructor's pdf, thank you for this!~
YOURE THE BESTTTT THANK YOUUUU FINALLY SOMEBODY DID THIS RIGHT
Excellent video...
Perfect explanation...
Love from India 🇮🇳 ❤️
thank you for helping me! You are better than my prof!!!!!!!!!!!!!!!!!!!!!!
This is well informative. This would have been very helpful when I'm taking calculus back then.
In the end, took the class 3 terms because of this topic alone...
this video integrates everything you need to know to ace solid of revolution
I am just getting interest on the subject, just by seeing him...what ah positivity his face has!!!! Wow!!!
Thank you so much for the explanation ☺️
didnt understand disks+washers until this video, thank you bprp :OO
This helped so much. thank you
Thank you! I really need this for my final exam.
I love this guy.
Well explained brother
damn im literally halfway the topic in Ext 1 and you just posted, hell yeah!
I needed to review this topic and my goal for this week is to solve 100+ integral problems 😁 nice timing!
That is a big help. Very much appreciate it!
you teach wonderfully thank you!!!!
You are my hero i’m seriously appreciate bro❤❤
Great video!! Helped me figure out how to set up my equations
Glad it helped!
Thank you! it's really helpful!!!
You're excellent illustrator (Y) ❤️❤️❤️❤️❤️❤️❤️❤️
YOU JUST SAVED ME! ALL HAIL!
I learned more about calculus in this video than I learned in college in one year
Comment on 10:44 - Washer method because the shapes do not look like wash-machine BUT because the outer shaper/graph relates to WASHER y = root-x and the inner shape y = half-x relates to BOLT that goes into washer or ring. .. .very good intuition on finding area / volumes under curves using integration. .. good job.
I'm having calculus test tomorrow,this help more than 2 hr lectures,wish me luck
thank you for explaining!
thank you for this, i really couldn't get it when only reading the module
Here is one guy who makes math fun
I did a volume of solid revolution around the line y = -x just to crank things up a notch. It took a while since I had to rotate the region clockwise π/4, then do a revolution around the y-axis with shells. It's a bit of work, but doable. Unless I made a mistake somewhere I got 52/15 * √(2) * π.
This video was amazing! Thank you so much for your help :)
Glad to help 😃
Holy shit, i think this video just saved me. Thank you!
I were studen 2000 years . But you are my idol
loved the martini glass joke lol. also, very helpful video. wish me luck on my test tmrw!! lol