Measurement and Significant Figures

thank you for teaching me what significant figures are👏👏👏👏

Very helpful video! I'm a chemistry major and lol my exam is in 3 hours

Who came from Mr abd al mohsen

I LOVE YOU CHEMISTRY JESUS!!!!

way better explanation for sigfigs then my chem teachre

Currently enrolled in AP Chem and this helped me so much!! Thanks a lot!

Shouldnt the number of sig figs be defined by the measurement method? For example, if your instrument measures to two decimal places but you get a measurment of 100. Wouldn't that cause some issues? Please tell me if i am missing something.

Holy moly, I thought I understood sig figs, but you explained it way better than my chemistry teacher in a tenth of the time. I found you trough your debunking content and I'm glad I did. I just started the general chemistry series and I can already tell that school is about to get a lot easier. Thank you, Dave.

Jesus saved me again.

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الصفر بين الارقام تعتبر ارقام معنية
وكذلك هذه 0.00077

OH thankYou Jesus⚘️

we know edu of India is bad we need this type teacher here only students face unhealthy completion and stress anxiety ಠ∀ಠ🤪

I wish i had found these videos 5 years ago when i was taking chemistry in undergrad but its nice to relearn with all of these videos

👍👍👍

Hi just want to say thank you for making those videos. They are super helpful when I need to refresh my memory of some old knowledge I learned from school a long time ago. Also I learned all this in Chinese and usually have no idea what the English equivalents are. Your videos especially illustrations help me to pair them up. Thanks!

If I should take the minimal number of minimal decimal places for an addition / subtraction, wouldn't this mean 10,000 + 1 (0 decimal places) is 10,001? This seems to contradict the example when we estimate 10,000 people in the room, and one enters.

I certainly hope you have learned more than just Significant figures on 4 weeks!

amk bu konu neden var

Thank you professor dave, I struggled with sigfigs for so long

Yeeeh the intro's fire

Damn this all began 7 years ago

Felt like I understood it, until I got majority of the answers wrong

I needed this because I STILL don't 'get' why zeros AFTER the decimal point, but before the first non-zero digit, aren't significant. If you KNOW you've got 35 millionths of an inch, 0.035000in, why isn't the tenth of an inch 0 'significant'? Accurately measure down to the millionth of an inch, by definition you've accurately measured the tenths also.

It's probably just a subtlety in use that makes sense when you start doing calculations and want to keep the number of significant digits consistent, so that your measurements and figures can be reliably duplicated by others, without getting kinked up with rounding errors and so forth. I wish I didn't have this nagging little feeling that I'm missing something, but the video is consistent with what I remember being taught, and the rules are unambiguous, so it's just a little quirk I'll have to DEAL WITH!!! 🙂

I'm from Peru and i'm here because i need to learn chemistry in english, thank you very much for your videos

Im thinking ill go biochem so this is really helpful thanks!

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How do we communicate the difference of an estimation and exact number. If I am wanting to calculate exact numbers to get the most precise study done of people going to night clubs. So then I record exact numbers of attendees every night and one of the nights there is 100% exactly 10,000 what would the standard way of communicating that be? I know we don't always have to follow standards but its often best practice.

Hi there, how do we determine the sig fig of uncertainty, standard devaition , relative standard deviation and standard error in analytical chemistry? thank you very much

I dont understand. Ex if a theater has 1000 seats and all seem to be occupied then one can say head count is 1000 with only one significant number.
However if the capacity is 1009 seats measurement suddenly has 4 significant digits.

HOW?

Very nice! See an alternative approach in my channel.

People with dyscalulia have entered the chat, im one of them😂😎 I'll have o review it a few times, but its still more understandable then my school books would have been.

I hate maths! I got a grade 'C' in school but in all honesty, only the simplest maths makes any sense to me.

👍!

This is probably the only video in this channel I did not understand 🤔

Hi Dave
I want to ask you a question about that.
For example when I multiply 20 with cos25, should I round the result to 20? Because 20 has the least significant figures.
20*cos25=20?
Could you help me?

Thank you so much Professor Dave!!

Gap yo'q Dave aka, rahmat!

Tr in arabe

im dumb, thannk you for this

How would I notate that I know that the crowd has exactly 10,000 people? for instance if I counted every single person in a building and just coincidentally it was exactly 10,000 how can I notate this?

💞❤️Amazing way of Teaching 💞❤️

thanks?

i would body slam my teacher

I'm rewatching to retain my knowledge from my 11th and 12th grade about gen chem and gen bio to test my knowledge and prepare for my biochem class☺️