Q2b Tables: Uncertainties with log and ln | A2 Practical Paper 5 | Cambridge A Level Physics

[@sofeanoh]

i went to your channel straightly to confirm that u're a malaysian because of the "lahhh" at the end of the sentences xD btw thanks for the video! it helped me to solve my uncertainties problems :D

[@sia1234]

What does that mean, tho??😭

[@sia1234]

My last ever CIE is tmrw, but I'll keep coming back to yur channel to get the vibe from yu! 😫🐥🫂

[@17tamim]

sameee lol my last cie too, etphysics deserves moreee subs

[@sia1234]

@@17tamim yea😭

[@mariyashandle]

my exams were cancelled and im having imitation exams (basically a mock) and this video helped a lot Thank you!

[@idkypplhavenames2891]

thankyou this rly helped in doiing the IB IA even in chemistry

[@jyotsnabhageria6893]

Thank you so much! This gave me so much clarity!

[@astrar7]

what do i do if i get a question like nov 2014 p51 q2?

[@weare223]

use log max value -log actual value(given in table) its easier

[@ETphysics]

Yepp, this also known as the "half the range" method! :)

[@kingpronouncer9894]

Do the uncertainties have to match the dp of the calculated value like what we had to do in AS paper 2

[@ETphysics]

no necessarily.

[@sasminimeegammana5279]

Can't we use the natural log (ln) with the 1st method of half range

[@ETphysics]

Yes you can! Take ½[ln(max value) - ln(min)]

[@sasminimeegammana5279]

Thank you so much miss...♥️

[@praneetshakya3813]

for the log uncertainty can we use the formula Δlog(x) = log(x+Δx) - log(x)

[@rib4607]

yh

[@markduenas0927]

Hello Miss! What if the raw data does not have uncertainty but we're asked to include uncertainty in the calculated data?

[@ETphysics]

If they didn't give uncertainty, they should give a max and min value! Or repeated measurements - from there you can find half the range, and use ½(max-min) as uncertainty

[@weinerglory]

@@ETphysics TYSM! im doing my lab report on tau time constant and this helped so much

[@vaniazehra7282]

quick question Miss, both methods give the same answer right? or is method 2 more accurate than method 1?

[@feliciateong9987]

hi can you please try FM19 p52 too, it has power inside log eg log(n/10^-3) im not sure how to do the questions after that.. thankiew so muchh !!

[@ETphysics]

Check out the recently posted P5 videos about prefix in lg and ln - also similar scenario kzbin.info/www/bejne/ipC5i5t_gcx9oqc and try to see if it addresses your confusion :) we may or may not be able to record FM19 P52 in time.

[@feliciateong9987]

@@ETphysics got it ! thankiew so muchh ❤️❤️

[@ETphysics]

@@feliciateong9987 You're welcome, drop us a comment and let us know if you manage to figure it out on your own or if you need more help. :)

[@feliciateong9987]

@@ETphysics yep i got it now, before that i wasnt sure whether to include the power when calculating the questions in the last page because 2019 mark scheme doesnt include it.. now I am clear 🙏🏻 thankiew so much for the great explanation ! I have learnt a lot and understood a lot better after watching videos from this channel , you guys make Physics easy and interesting ! Will definitely share this channel with my friends ! Thank you once again ❤️

[@ETphysics]

@@feliciateong9987 Well done!!