Uncertainties - Physics A-level & GCSE
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- čas přidán 5. 07. 2024
- scienceshorts.net
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00:00 Resolution & absolute uncertainty
03:14 Zero error & measurements
05:13 Uncertainty in readings vs measurements
07:42 Uncertainty in a mean
09:12 Assumed uncertainty
10:10 Combining uncertainties
17:10 Uncertainty in a gradient -
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How uncertain I was on this topic: ±100000000
My uncertainty after watching this video: ±0.0001
lol
Literally explained it better in 20 minutes than any teacher at my school ever has in 2 years.
Somebody give this man a medal.👏👏
🥇
just no
or you just like paying attention when youre alone
literally took me 2 years to understand this ngl
great video mate, helped a tonne + or - 1kg
IMPERIAL?!?! *triggered*
Edit: he changed it from ton. I aint an eejit.
a tonne is the metric unit, a ton is the imperial
I see what you did there :) well said :) you're funny, smart comic I see..
That's some great humor.
me 2@@edgarevanmendez8829
My brain hurts
mine too, good night
@@diyapatel3286 Good luck with your exams ; )
@@YazhShah thank you :))
😂😂
Mine 3
I was so confused after doing uncertainty in class but this video cleared it all up. Many thanks, just started A level physics and I think I'l be back to this channel a lot over the next 2 years...
😭 I wish I was back in y12 dying rn in y13
@@simplypotet5561 nah fr
A levels have arrived on your doorstep now...
@@phase0400 yup, I did paper 1 a week ago, paper 2 coming up soon…
Update: 2 years later and I'm back to this video to revise uncertainties for paper 3
I HATE PAPER 3!!!!!
I just become a professor in uncertainty in 21 minutes
when I become a Billionaire I will donate 1 Million ± 10% money to your channel :)
I'd be more than happy with 900k.
🔜🔛🔝 #scienceshorts❤️
This video will never get old..... it's relevance will keep resurfacing timely.... lucky are those who view it while they need to.
Legit watching this the night before let’s go
Hey, thanks for all the videos you make on physics, it really helps me consolidate my knowledge coming up to the AS exams, and I also like your sense of humour. It always makes me chuckle hearing you complain about how rubbish a past paper question is or whatnot
If you still need help with A Level Physics, you should check out Alt Academy, we have a TON of resources, including video lessons, revision guides, 24/7 academic support, handwritten past paper solutions with explanations on each step, and we even have our instructors sit live every night and solve a timed past paper, explaining why they're taking each step.
wow this is what I actually wanted. A lot of textbooks didn't coverup different types of uncertainty explicitly. Thank you so much
When ever a new character is introduced
Science shorts guy: Hey is that Bob?
You sound like Chris Hemsworth
Relying on you man.
Hahahahah swear
This was so satisfying to learn for some reason, it just makes sense!
Wow this was long but extremely useful. Thanks alot, I finally get it.
Can you be my physics teacher? xD
Thanks! You helped a lot :)
Some digital device reading can have zero errors if they aren't zeroed(calibrated). Eg. There's a zero button in digital scales, but if you press it when there's a weight on it, it will use the weight as the starting point of the reading instead of 0, hence zero error.
15:36 was that a DJ Khaled meme ffs :D
bruhhh LOOOL
thank you, best video I've seen explaining uncertainties which I'll defiantly remember in my exam tomorrow.
How did your exam go?
What an excellent video. Extremely well explained, delivered and narrated. Subbed!
You made me understand it in 2 minutes when it takes school a year and still doesn't make you understand the subject well, thank you 🙏.
thankyou for this video. Because of you i got an A in my physics test. I really appreciate the video. I'm looking forward to more videos
MY TEACHER SPENT 4 HOURS TEACHING THIS AND THIS VID MADE ME UNDERSTAND IN 20 MINS TYSMMM KING
Easy explanations that clarify all the intricacies in a difficult topic.
Thanks so much.
this was amazingly explained, thank you so much!
I’ve got my final physics paper today. Big thank you for all the videos you’ve posted
2 yrs later and it's my final physics paper today XD. This guy's a savior
Thanks so much sir! I'm doing A Level physics and uncertainties made no sense but after you explained it I fully understand it.
Good luck everyone for tomorrow!
Same to you!
I like we all came here right before the exams, anyways good luck mate
Andddd im back for paper 2 as it didnt show in p1 😂😂
Stan P good luck! 😝
@@harrietjones1409 cheers bruv. What did you think about p1?
I have done physics for about 5 years and still NO IDEA how to use a micrometer, weird pieces of equipment
It's not a weird equipment, u are just dumb
'Tis a true "BRUH" moment
lol dumbass
Haha ha ha
@@kanthihirimuthugoda3732 BASED
that info about the gradient and best fit was pretty cool.
This is amazing. I was so confused before
So when matching precision of our calculation to the recorded values, do we use the least precise sig fig or dp? I hope that made sense... Also, thank you for saving my life with this video!
ur my hero. literally im in yr13 and I never understood any of this and you changed it.
who else got AQA paper 3 tmo loool
Boi u know u knowww. Hahaha, I am so screwed
Edexcel tomorrow for me, good luck!
Vortex Warp U 2
good luck Bois, you'll all smash it, bet you're all class
Hahaha same, wish I saw this video earlier tho😂
This is the perfect video for London ALs bro Thank you so much👍
EXTREMLY HELPFUL! Thank you very much.
Best explanation of uncertainity on youtube, thanks
Great explanation and so useful...
beautifully presented, simple, and very clear.
Actually a saviour I was really struggling with uncertainties.
Does the fact that Uncertainty for readings is half the resolution,and for measurements it is the resolution,hold up even in higher studies or just till the A'levels?
wow, ur explanations and videos are amazing and so is the lighting! you should make more videos
best video to explain the uncertainties ever!!!!!! better than my physics teacher's explaination actually.
Final physics paper on 16 June 2022. Appreciate the last minute revision.👍
what was your grade?
@@chamanarasultana7778 c should’ve remarked but hit first choice uni
thank you for this came across a question in a past paper and thoroughly helped me answer it, thank you.
Great video - cleared up a lot of confusion.
we got this stuff for bridging work so I haven't even started physics a level and they've given us this with no help -_- Thanks a ton dude u helped me understand. I would've been a wreck :D
This video saved my life before my exam,thank you
What if you weren’t given the percentage uncertainty value when working out v^2? Would you go straight to doubling the +or- m/s value instead?
You explain this so much better than my textbook thank you
Hey this really REALLY helped! Thanks so much! God bless you man!
Bros explains it so well and clearly aswell and this is 5yrs after
Genuine lifesaver, thank you so much.
hi, not sure if this has been pointed out, but you mentioned that we must keep the number of figures from the measurements/reading the same when making calculations, but what about in the calculation of h^2 down to h, can u reduce the number of sig figs there in that case? or might that risk a loss of marks, helpful video nonetheless
Awesome thank you for clearing this up!
You are a life saver
Very well explained. Much respect
This helps alot! Thank you!
You are a hero I really didn't understand how to calculate uncertainity
For the EDEXCEL spec however, they consider Micrometres and Vernier Callipers to have 1/2 * resolution.
Brillian video. Thank you
This was so helpful thankyou so much!
Absolute legend, thank you so much (I think I finally understand uncertainties now)
Wow! This is amazing. Thanks so much!!!
Great video! Helps for teachers too!
Awesome video! Very helpful.
This was really helpful, thank you!
Great video, thanks!
1. Nice vascularity sir.
2. I'm 100% certain I am acing this topic after your clear explanation, I'm grateful.
THIS VIDEO SAVED ME THANK UUU !!!!
You have no Idea how much I love you
thanks you so much, it really helped. u got a new subscriber
I watched 8 videos of uncertainty but this one helped the mOST. Thank you so much!
Had a question come up with a percentage uncertainty on v in a enquire with v^1/2 and it does halve uncertainty apparently which I find crazy
you taught it really well. thanks
When you stated the absolute uncertainty in the velocity 15:04 you only gave it to 1 s.f but the actual velocity was given to 2 s.f. However, when you square rooted 50 (16:47) you gave the answer to 2 significant figures so 7.1 but the actual height 50, was only given to 1s.f.. Are you supposed to give the uncertainty to the no. of significant figures or the no. of decimal places?
This is of great help, could you provide references or source particularly in no zero error and zero error?
Thank you so much for this, exams in 2 days really appreciate it 🙏
Wonderfully explained 👏👏
Hey if you don't mind me asking, what if we have to change the prefix? How will the uncertainty change?
E.g. in current: 10 +/- 0.1 mA to 0.01 +/- n A
What is n?
Very well explained. Today you can tick that box for contribution made to man kind 👍
I should have watched this video at the beginning of y12. But here I am, near the end of y13, finally getting this topic.
Great video(s!) -- I've been watching tonnes of them recently. Quick question -- Can I expect anything on uncertainties for AQA Paper 1 and 2? or is it all within the experiments part of Paper 3? Cheers!
Pretty sure it's all just on paper 3.
I don't have experience in calibration but end up working on uncertainties, I am always wondering how to get uncertainties for gauge block comparator and all related factors affecting the result.
Hi, nice video.
Just a question, if we have a table with numbers only then the uncertainty is given by Mean +- (0.5*Range) ? Cause I came across this from a AQA documents
Yes.
U r a legend, Now thats for certain
Do you have a video for the micrometer screw guage and vernier calliper measurment recording
czcams.com/video/Lh7Em7lg5aM/video.html
Science Shorts thanks!!!
Ill check out the micrometer guage somewhere else, but the vernier scale really helped me out
Gosh, I wish I had this when I was doing my finals
I love this video, thank you mate.
Thank you so much mate. I was going to fail my exam before I watched your video😀
What about if let's say i need to find the uncertainty for the calculation of the volume of a cylinder which is pir^2h how do I find the uncertainty for the volume?
Dude, thank you so much!
really useful video, thank you for it
ur voice is calming
At UIUC I was taught to estimate the nearest 10th of the resolution, so that thermometer reading would have been 21.5 +/- 0.5
That's not a 10th, but a half - that is what most consider appropriate. Not me.
I feel like there are discrepancies if you don't know the insruments precision why is the uncertainty + or - 1 x lowest sig.fig and not 0.5 x lowest sig.fig since the measurement might be calibrated
Great video for revision, also in good quality so 👍