This made my entire biology assignment so much easier. Thank you!
@DBiologyClassroom
3 жыл бұрын
You are welcome :)
@frankensteinx5378
4 жыл бұрын
This video is super underrated:( BEST BIOLOGY PAPER 3 VIDEO EVER
@DBiologyClassroom
4 жыл бұрын
Thank you so much :) help me to share it ! =D
@inthebackwiththerabbish
5 жыл бұрын
Why did I just find you an hour before the exam 😂😂
@DBiologyClassroom
5 жыл бұрын
All the best !!!
@inthebackwiththerabbish
5 жыл бұрын
David de lecturer thanks (:
@faithzoey6659
10 ай бұрын
😂😂😂😂Me too 4 yrs after
@inthebackwiththerabbish
10 ай бұрын
@@faithzoey6659 good luck 😂😂😂
@rameensuleman7403
5 жыл бұрын
Watched every practical video, amazing!! thank you so much and keep doing what you are!!!
@DBiologyClassroom
5 жыл бұрын
Thanks ! :)
@mxhsvn_b7866
3 жыл бұрын
I LOVE YOU THANKS FOR SAVING MY LIFE!!!!!
@DBiologyClassroom
3 жыл бұрын
You are welcome !!
@sharontlx
4 жыл бұрын
Thank you for the clear explanations and examples!
@DBiologyClassroom
4 жыл бұрын
you are welcome !
@nichecritter
5 ай бұрын
Super clear explanation, thank you!
@DBiologyClassroom
5 ай бұрын
you are welcome!
@AbdelrahmanOsama
Жыл бұрын
Thanks for the video, but I got confused at 00:52 "Both of the uncertainties in a measurement must be taken into account; the uncertainty of the zero marker and the uncertainty of the measurement point. Example: Burettes and rulers Both the starting point and the end point of the measurement must be judged. This leads to two uncertainties overall, making it a measurement. Both ends of the ruler have a ±0.5 scale division uncertainty, therefore the measurement will have an overall uncertainty of ±1 division. For most rulers, the uncertainty in a measurement of length will be ±1 mm." - physicsandmathstutor The syringe examples makes sense because in the first case you only one judgement is made and in the second case two judgements are made. But in both cases for the ruler, two judgements are made.
@DBiologyClassroom
Жыл бұрын
Hi, in A level, we consider no judgment needed when u are measuring by using a 0 of ruler as a starting point. As it's the end of the measuring instrument. But of course, some might consider a judgement is needed there as long as the 0 is not exactly the end of the ruler, hence two errors are considered. "Similarly, if using a ruler then there would be an error at each end unless you start at 0" - learner guide for Cambridge international AS/A level biology 9700
@AbdelrahmanOsama
Жыл бұрын
@@DBiologyClassroom Thanks
@DBiologyClassroom
Жыл бұрын
@@AbdelrahmanOsama No problem at all
@amberasif4405
4 жыл бұрын
beautifully explained! thanku sir!
@DBiologyClassroom
3 жыл бұрын
Most welcome!
@ikovenseri3069
3 жыл бұрын
Thank you so much
@DBiologyClassroom
3 жыл бұрын
You are welcome !
@anisreesan
5 жыл бұрын
Thank you so much.Awesome.
@DBiologyClassroom
5 жыл бұрын
You are welcome
@nabihaamir8453
3 ай бұрын
YOU`RE AWESOME!! 🙌🙌
@DBiologyClassroom
3 ай бұрын
Thank you 🙏🏻🙏🏻🙏🏻
@nabihaamir8453
3 ай бұрын
@@DBiologyClassroom YOU LITERALLY SAVED MY GRADE SIR!! AAAA!! MY PAPER WENT EXTREMELY WELL, AND IT COULDN'T HAVE BEEN POSSIBLE WITHOUT YOUR HELP!!!! THANK YOU!!! THANK YOU!!! THANK YOUU!!!!😭😭💛💛💛
@nabihaamir8453
3 ай бұрын
@@DBiologyClassroom MAY GOD BLESS YOU SIR! YOU`RE AMAZING!!!🙏😭😭💛
@DBiologyClassroom
3 ай бұрын
@@nabihaamir8453 you are welcome! God bless you too.
@rameen589
4 ай бұрын
does the not counting error when starting from 0 stuff apply for the 2024 syllabus as well?
@__erikaa
4 ай бұрын
it honestly just depends on where you decide to start measuring from
@DBiologyClassroom
4 ай бұрын
Hi, yes it does
@nicolafaduku2214
5 жыл бұрын
This is pretty good, thank you😊
@DBiologyClassroom
5 жыл бұрын
you are welcome !
@domanidouglas9192
3 жыл бұрын
No dislikes! Lets gooooo
@DBiologyClassroom
3 жыл бұрын
Thanks for your support!
@Tarantolan
Жыл бұрын
❤thank you
@DBiologyClassroom
Жыл бұрын
You are welcome 😁
@user-nd2zs2ic6k
2 жыл бұрын
at 0;25 why was the smallest divison 1mm? Im a bit confused on where ur getting these numbers from?
@DBiologyClassroom
2 жыл бұрын
Hi, that is the measurement of the smallest division on the ruler. Each of the division is 1mm.
@kuroomeow
3 жыл бұрын
for 0.5/34 x 100%, i tried it on the calculator and got 0.0147, i was just wondering if that meant x 100 and not 100 percent.... I'm still so confused. I have a lab report due and I had no idea how to calculate any of this, thank you for this video it helped me a lot!!
@DBiologyClassroom
3 жыл бұрын
hi, yes, just x100 to change it into %
@kuroomeow
3 жыл бұрын
@@DBiologyClassroom thank youuuuu!!!
@DBiologyClassroom
3 жыл бұрын
@@kuroomeow you are welcome!
@chewjayren3129
5 жыл бұрын
Hi, thank you very much! May I ask a quick question regarding degree of uncertainty? In 32/M/J/12 Q1 aiv), they asked about the degree of uncertainty for a ruler which goes from 0 to 2cm with 1mm divisions... and their calculation was 0.5mm x 2 = 1mm, with the answer being +/- 1mm. Why did we have to multiply by 2 here? Sorry for the trouble and thank you once again for the vid
@DBiologyClassroom
5 жыл бұрын
Hi, in the old papers, they consider that as long as the ruler has a gap between zero and the end, error applies at both ends. But in the 2016 learner's guide, it is stated that "if using a ruler then there would be an error at each end unless you start at 0". So I think it is safer to follow the latest statement.
@chewjayren3129
5 жыл бұрын
@@DBiologyClassroom Hi I see! Thank you very much for the help 😊
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