its almost the end of 2019. and the couple of videos I've watched from you, like this one made in 2008, has helped me so much in my chemistry class. I've learned more from you than I have in my chemistry class for the past 4 months. May God bless you !!!! I still wished i had found you earlier, but i will share this to others!!!
@funkyboy90000 i only add zeroes if it's BEFORE the decimal point. so (rouding to two sig figs) 83,930,200 becomes 84,000,000. or 3,732 becomes 3,700. but if it's AFTER the decimal point (like 8.4) there's no need to add zeroes. so 4.5324 just becomes 4.5, and (rounding to 3 sig figs) 3.4854759273 becomes 3.49.
@Lauren5723 so i don't want to be a jerk here, but in terms of significant figures, there *is* a difference between 8.4 and 8.400000. i talk about this in videos 1.3 and 1.4--check those out if you have questions. in short, the more zeros after the decimal point, the more *accurate* a number is. it's like i've used a super ruler or something, i know that a distance is 8.4000 EXACTLY, not maybe 8.4 or 8.41 or 8.42 or 8.39.
The clearest videos ever on this topic. THANK YOU...This is where people in my Chemistry class will lose the most points and you made it very easy. If I get an A, and I intend to, your videos will be a major reason for that! What a great teacher.
thanks so much for your comment. i plan to record some videos talking about zeros soon, but i've been really busy. in the mean time, if you have questions, feel free to youtube message me.
OK, good question. Soon there will be another video that talks about zeros. But, technically, 2000000 has only 1 significant figure. but 2000000. (see that decimal point after it) has 7 significant figures. so 200000 = 2 x 10^6, and 200000. = 2.000000 x 10^6.
Mr. DeWitt deliberately builds suspense and thus curiosity, a low pressure area of brain weather, around the question of which number to use for significant figures, with the result that I really want to know!
@YesItsMeh1992 good question. the important thing is to do what your book or teacher wants. but technically, if you're converting a fraction to a decimal, you don't have to do any rounding, so your answer can have as many sig figs as you want. so i guess the book says 2 sig figs to make it simple, but really it could be 5 or 6, or however many you want. but ask your teacher and do what they want, so you don't lose points.
missed so much high school due to illness, now at uni in free time catching up on everything to do with maths and science. this is so helpful thank you
believe it or not, yes that's true IF YOU'RE SUPPOSED TO BE USING SIGNIFICANT FIGURES TO ROUND. that's the important thing. you use significant figures to round whenever the numbers you're working with are measurements, like 34.2 grams or 74.5 feet. you measure a lot in science; that's why you use sig figs in science. so if someone asks what's 5 times 5, obviously the answer is 25. but if someone asks what's 5 grams times 5 grams, the sig fig rounded answer would be 30. make sense?
I understand what you're saying, but in the problems here, the 2 isn't any more certain than the 26, the 218, or the 59,411. In other words, a number isn't an exact number just because it has only one digit. This is a tricky concept, and I made a video about it. For for more info, check out my video called "Significant Figures with Counting Numbers and Measurement." Message me if you still have questions.
GREAT question. it's actually that sig figs are designed to make your answer less accurate. i know that sounds confusing; watch my video called "what's the point of significant figures?" and message me if you still have questions.
this teacher is the best. I hvent heard significant figures in my whole life lol! And never remember anything about chemistry. Now, I am attending chemistry class and this is my first time studying like this. Thanks a lot because of you I learned this
here are two videos that answer that question: watch "why are significant figures important?" and watch "significant figures with counting numbers and measurements." those should answer your questions.
I remember my grade 11 chemistry now. I am ready for grease 12 Physics all because of you. You are a great help for students struggling on these things. Thank you.
@drgon41094 i'm really glad this helped. also, be sure to check out my other significant figures videos (1.3-1.9) that talk about how to deal with zeros, as well as how to do addition and subtraction.
yeah, you got it right. putting the zero makes it have only 2 sig figs. 6 and 5 are both significant figures, and then you fill everything else in with zeros, because zeros at the end of the number don't count as significant figures. does that make sense?
PatrickJMT is my go to for math help but YOU have earned the privilege of helping me with the oh so amazing world of chemistry :D Thank you so much for your dedication and hard work to your loyal viewers !
Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.
Actually, my chemistry book says "because they have no uncertainty, exact numbers do not limit the number of significant figures in the answer" thus, the problem at the end involving the two would have as many significant figures as the calculation requires.
THANK YOU THANK YOU!!!! Oh my gosh... You sir have made my life easy! You explained something my teacher tried teaching my class, but litterly no one got it. I am so relieved, I wish you were our class techer at PMSA. *PHEW!* Anyways thank you very much, I REALLY apreciate it! :D
isn't the point of sig figs is to be as precise as possible? why would you want to take a whole number like 5,019,553 and drastically change it to 5020,000? how is that being scientifically acurate?
JayAllan Bennett Great question! So I made a video on that exact topic here: th-cam.com/video/VAuslY-Uuf4/w-d-xo.html. Honestly, it's probably my favorite video I've ever made, so you should check it out!
I mean I kinda thought it was so that you didn't have to write 3.737492022292092636392010162636482927364368298 or 3.757920183683930102763739201927748201918363820208474839291836373019×10^12
Thank you so much. I know this was put up forever ago, but my Chemistry teacher doesn't explain the lessons very well. I have a test tomorrow and will pass because I now understand Significant figures.
well, the book's wrong, but also be sure to check your own answer. when you do the math, you get 6775.04, but then you want to round that to 3 sig figs, so your final answer should be 6780, not 678. make sense?
an aside to the multiplication between 59411 and 2. Imagine a box with one side estimated to 59411 an another measured by exactly 2. you would be able to round to 5 sig figs. this is because 2 is an exact answer with an "invisible" decimal place and an infinite amount of zeros behind the decimal. you should only round to the least amount of sig figs of estimated numbers to retain precision.
@zaniakuda23 thanks so much for your kind comment! and there are more significant figures videos (1.3-1.9), too; check out my channel/profile for links to all of them.
You are really good in explaining everything. I understand a lot more after watching your videos. Pls put up more chemistry videos. I hope you are a teacher because you are amazing. Keep up the good work!
I'm in college now (or what I guess would be "high school" in America). I really wish I'd discovered these videos when I was in school, I would have gotten such a better grade on my science papers and probably my maths papers as well!
You have just successfully taught me SIGFIG in 10 minutes compare to the 60 minutes that my teacher spent trying to keep her students' heads from exploding. Thank you, tdewitt451. and TH-cam.
I've always had a hard time learning how to do stuff in books, or by reading. I find it easier when you have an actual person show you. Because books don't always answer all your questions, and i also get lost in which order to do it.
THANKS SO MUCH! You helped me a lot, especially by providing so many examples to better help me understand! I'm taking chemistry this year and this will really help me. Thanks!
i feel like you have taught me more then my teacher has all month
same
soo true
Maria Camacho same here
Yeah actually but now it is 2020
@@stephenmealing6366
Thanks! You've taught me more in 5 minutes than my teacher has in 2 weeks
The world is in urgent need of more amazing teachers like you - great explaining! Can't wait to see more of your videos!! Really helps :))
its almost the end of 2019. and the couple of videos I've watched from you, like this one made in 2008, has helped me so much in my chemistry class. I've learned more from you than I have in my chemistry class for the past 4 months. May God bless you !!!! I still wished i had found you earlier, but i will share this to others!!!
@funkyboy90000 i only add zeroes if it's BEFORE the decimal point. so (rouding to two sig figs) 83,930,200 becomes 84,000,000. or 3,732 becomes 3,700. but if it's AFTER the decimal point (like 8.4) there's no need to add zeroes. so 4.5324 just becomes 4.5, and (rounding to 3 sig figs) 3.4854759273 becomes 3.49.
"Now if you're SMART.." Yes sir!
Taking my final tomorrow...wish I found you earlier.
same mine is tommorrow
Same after two years 😂
deselise same here
DID U FAIL?
Jay Dela Cruz I got an A on my multiple choice and free response. Tyler is amazing!
3 seconds---- what if I'm stupid?
then you need to watch a vid on "how to remove stupidness"
Then it'll take ten times as long for you to figure it out.
Try to be less stupid...
thanks for your kind comment!
it's always great to hear from people like you who enjoy my videos!
This is the like 3rd time i been watching these videos it never hurts to refresh. The best lessons ever online
@Lauren5723 so i don't want to be a jerk here, but in terms of significant figures, there *is* a difference between 8.4 and 8.400000. i talk about this in videos 1.3 and 1.4--check those out if you have questions. in short, the more zeros after the decimal point, the more *accurate* a number is. it's like i've used a super ruler or something, i know that a distance is 8.4000 EXACTLY, not maybe 8.4 or 8.41 or 8.42 or 8.39.
The clearest videos ever on this topic. THANK YOU...This is where people in my Chemistry class will lose the most points and you made it very easy. If I get an A, and I intend to, your videos will be a major reason for that! What a great teacher.
thanks so much for your comment. i plan to record some videos talking about zeros soon, but i've been really busy. in the mean time, if you have questions, feel free to youtube message me.
OK, good question. Soon there will be another video that talks about zeros. But, technically, 2000000 has only 1 significant figure. but 2000000. (see that decimal point after it) has 7 significant figures. so 200000 = 2 x 10^6, and 200000. = 2.000000 x 10^6.
I spent a year in Honors Chem and couldn't figure this out. Then a mere 10-20 minutes watching your videos I could teach this. Thanks!
thank YOU so much for your comment!
Mr. DeWitt deliberately builds suspense and thus curiosity, a low pressure area of brain weather, around the question of which number to use for significant figures, with the result that I really want to know!
Thank you so much! My Chemistry teacher doesnt teach ANYTHING. We need more teachers like you in high schools!
@YesItsMeh1992 good question. the important thing is to do what your book or teacher wants. but technically, if you're converting a fraction to a decimal, you don't have to do any rounding, so your answer can have as many sig figs as you want. so i guess the book says 2 sig figs to make it simple, but really it could be 5 or 6, or however many you want. but ask your teacher and do what they want, so you don't lose points.
Not even in school and watching this. You make chemistry interesting Sir!
missed so much high school due to illness, now at uni in free time catching up on everything to do with maths and science. this is so helpful thank you
believe it or not, yes that's true IF YOU'RE SUPPOSED TO BE USING SIGNIFICANT FIGURES TO ROUND. that's the important thing. you use significant figures to round whenever the numbers you're working with are measurements, like 34.2 grams or 74.5 feet. you measure a lot in science; that's why you use sig figs in science. so if someone asks what's 5 times 5, obviously the answer is 25. but if someone asks what's 5 grams times 5 grams, the sig fig rounded answer would be 30. make sense?
This 5min video taught me more than my teacher has this past month! Thank you so much
I understand what you're saying, but in the problems here, the 2 isn't any more certain than the 26, the 218, or the 59,411. In other words, a number isn't an exact number just because it has only one digit. This is a tricky concept, and I made a video about it. For for more info, check out my video called "Significant Figures with Counting Numbers and Measurement." Message me if you still have questions.
GREAT question. it's actually that sig figs are designed to make your answer less accurate. i know that sounds confusing; watch my video called "what's the point of significant figures?" and message me if you still have questions.
this teacher is the best. I hvent heard significant figures in my whole life lol! And never remember anything about chemistry. Now, I am attending chemistry class and this is my first time studying like this. Thanks a lot because of you I learned this
here are two videos that answer that question: watch "why are significant figures important?" and watch "significant figures with counting numbers and measurements." those should answer your questions.
He hasn't aged!!!!!! Best tutorial channel ever.
@Msmmyeahmm it's called "significant figures and zeros (1.3)". search that or just go to my channel page.
Cool, Easy,
The world needs teachers like you.
to learn how to do this, watch my videos on significant figures and zero. you'll want videos 1.3 and 1.4
I remember my grade 11 chemistry now. I am ready for grease 12 Physics all because of you. You are a great help for students struggling on these things. Thank you.
@drgon41094 i'm really glad this helped. also, be sure to check out my other significant figures videos (1.3-1.9) that talk about how to deal with zeros, as well as how to do addition and subtraction.
Fantastic teaching method, I don't hate significant figure anymore.
Thanks a million
Better than any teacher i've ever had! 10/10
yeah, you got it right. putting the zero makes it have only 2 sig figs. 6 and 5 are both significant figures, and then you fill everything else in with zeros, because zeros at the end of the number don't count as significant figures. does that make sense?
I never understood the Sigi-figi and in minutes you made it so clear. Once again, thanks so much!
This man is doing gods work!!
thanks for your comment. if there's anything that confuses you, send me a youtube message. i'm happy to help, and i often tutor over video chat.
PatrickJMT is my go to for math help but YOU have earned the privilege of helping me with the oh so amazing world of chemistry :D Thank you so much for your dedication and hard work to your loyal viewers !
Thanks, helps way more than what other people have shown me. Rock on
I was 4-5 years old when this came out. Now I’m 16 in Chemistry nd crying myself to sleep bc I can’t math 😭
Now you’re 20 and I’m the 16 y/o 😂😂
"math"
@@GothicPurple ? :)
@@Tony-Cerqueira 21 now 😭😭 i hope ur doing alright
Dude you're going to single-handedly get me through my finals this year!
Me : 3 ÷ 2 = 1.5
Me after learning significant figures :
3 ÷ 2 = 2
Lmao
thanks alot. My teacher teaches like a mad scientist when it come to this stuff, thanks for taking it slow and showing alot of examples!!!
No idea why people are complaining about this. This is gonna take you 5 minutes tops to learn its basically free exam/homework points.
Dude you are a genius i literally mastered it now AP chem gonna be a breeze.
YOU'RE BETTER THAN MY CHEMISTRY PROFESSOR
Hey everyone, I'm here to help. If you have any questions or just want to learn more, click on the link in the description above. It'll take you to a page where you can ask me questions.
Perfect video to review before a test/final!
Actually, my chemistry book says "because they have no uncertainty, exact numbers do not limit the number of significant figures in the answer" thus, the problem at the end involving the two would have as many significant figures as the calculation requires.
THANK YOU THANK YOU!!!! Oh my gosh... You sir have made my life easy! You explained something my teacher tried teaching my class, but litterly no one got it. I am so relieved, I wish you were our class techer at PMSA. *PHEW!* Anyways thank you very much, I REALLY apreciate it! :D
isn't the point of sig figs is to be as precise as possible?
why would you want to take a whole number like 5,019,553 and drastically change it to 5020,000? how is that being scientifically acurate?
JayAllan Bennett Great question! So I made a video on that exact topic here: th-cam.com/video/VAuslY-Uuf4/w-d-xo.html. Honestly, it's probably my favorite video I've ever made, so you should check it out!
It's to know the precision of the instrument being used to measure. So you know which instruments to use when.
Now In this case you might use scientific notation
Well it isn't really his fault he didn't invent it
I mean I kinda thought it was so that you didn't have to write 3.737492022292092636392010162636482927364368298 or 3.757920183683930102763739201927748201918363820208474839291836373019×10^12
This taught me so much 😭 I didnt understand how my teacher explained it and watching this made me understand so clear! Thank you so much!!!
You have made this sooo much easier to understand...thank you thank you thank you!!!!!!!! Maybe Chem class won't be so scary now :)
good luck! i hope you get 100%!
Thank you so much. I know this was put up forever ago, but my Chemistry teacher doesn't explain the lessons very well. I have a test tomorrow and will pass because I now understand Significant figures.
well, the book's wrong, but also be sure to check your own answer. when you do the math, you get 6775.04, but then you want to round that to 3 sig figs, so your final answer should be 6780, not 678. make sense?
thanks you I was in chemistry and now im in physics. throughout the whole of chem I couldn't understand sig figs but now I do thank you so much
an aside to the multiplication between 59411 and 2. Imagine a box with one side estimated to 59411 an another measured by exactly 2. you would be able to round to 5 sig figs. this is because 2 is an exact answer with an "invisible" decimal place and an infinite amount of zeros behind the decimal. you should only round to the least amount of sig figs of estimated numbers to retain precision.
+aaron sequeira That's what I was wondering too. Isn't 2 exact?
great question! watch my videos called "significant figures and zero (1.3)" and "significant zero practice problems (1.4)"
@zaniakuda23 thanks so much for your kind comment! and there are more significant figures videos (1.3-1.9), too; check out my channel/profile for links to all of them.
You are really good in explaining everything. I understand a lot more after watching your videos. Pls put up more chemistry videos. I hope you are a teacher because you are amazing. Keep up the good work!
I'm so glad I found this in the beginning of my chemistry 101 class.
you're better then my teacher.
he probabaly explained it 10 times and i still didn't get it. :)
yay thank you.
His first words were: "Now, if you're smart" And I'm thinking: Well I'm out.
Thank God for you. I thought I was going to fail chemistry this year....
Ahhh thank you! You are so helpful. My chemistry teacher now talks too fast and is inconsiderate.
So, thank you! x
OMG!!! why cant you be my teacher.. my teacher did nothing to help me.. this helps so much!!! GREAT!!!
Thanks a lot for this easy and useful video. The things are just how you say them.
I'm in college now (or what I guess would be "high school" in America). I really wish I'd discovered these videos when I was in school, I would have gotten such a better grade on my science papers and probably my maths papers as well!
Thanks m8 I got a exam today and this HAS helped I understand thank u
shoutout to @Tyler Dewitt for saving my grade.
same
every time he says you have probably got the hang of it and the whole inside of me screams ^^ GOT IT DUDE !!
Your significant numbers videos are very helpful. Thank you
I love this channel!! Helping me with chem 101.
its nice................now i m clear about significant figures
Thanks man that clarified it completly. Nice and straight forward. Stay blessed
where's the next lesson? why don't you make it?
You have just successfully taught me SIGFIG in 10 minutes compare to the 60 minutes that my teacher spent trying to keep her students' heads from exploding. Thank you, tdewitt451. and TH-cam.
You're a bigger help than my own teacher. Thank you so much!!!
thanks i didnt understand a word my maths teacher was saying but i understand it now ty :)
watch my videos called "significant figures and zero (1.3)" and "significant zero practice problems (1.4)"
It initially cleared my confusion.Thanks for clarification
Thank you for making these videos!!!!!! My teacher goes wayy to fast during her lessons so i was really lost. Your vids helped out alot! :D
i'm sorry, i have no idea what you're trying to say.
Actually your video has been very helpful to me
Thanks alot. You are a really good teacher.
I wish I found you earlier when I began learning significant figures in chemistry
>_< I'm loving your class thanks so much B-)
This man is singlehandedly saving my GPA 😅
Thanks man. I was behind in my chemistry class you helped me out a lot!
Thank you so much for taking time to make videos such as these! It helped me out a lot.
this taught me more in 12 minutes then my chem teacher tried to teach me for an hour and a half
Thank you so much. Dude it seriously helped, you have no idea!!!!!!
Wish I had you as my chemistry teacher! Thank you for the videos!
I've always had a hard time learning how to do stuff in books, or by reading. I find it easier when you have an actual person show you. Because books don't always answer all your questions, and i also get lost in which order to do it.
Thats it, ur my new teacher.
THANKS SO MUCH! You helped me a lot, especially by providing so many examples to better help me understand! I'm taking chemistry this year and this will really help me. Thanks!
hey tyler can u please explain the way to solve parallax method sums?
It's amazing how he taught significant numbers.