CIE A Level Physics Paper 2 -October November 2021 Paper 21-9702ON21P21-Detailed and Full Solution

CIE A Level Physics Paper 2 Solution -2021 October November 21-9702ON21 21-Complete and Step by Step Solution
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For COMPLETE and STEP by STEP Solution of March 2021 paper 21 , you can check the following link
00:00:00 Introduction
00:01:02 Data
00:02:30 Formulae
00:06:15 Q1) measurments and uncertainties
00:25:07 Q2)momentum conservation
00:39:30 Q3) stress and young'smodulus
00:52:12 Q4)waves and doppler effect
01:07:40 Q5) Electricity dc circuits
01:22:46 Q6)radioactivity
01:34:17 Outro

[alevelandapphysics-ali]

For detailed and complete solution of May June 2021 21, please check the following link

[uzmafoad]

Never seen such detailed explanations ....stay blessed sir

[Sarah-jrnq]

thank you very much sir for helping us. I wish great health and success for you. Just know your efforts are highly appreciated!

[elma]

Sir in question 1, how many significant figures should we keep for percentage uncertainty.... Only 1 sf? Can I put 2 to 3 sf or will they deduct marks? What's the ideal sf for physics paper 2 answers

[BOBO_]

Thank you for explaining, the doppler effect question is... confusing

[xuenwen]

Hi to calculate the uncertainty, do I need to multiply 2 if it’s 2x it’s only for x^2 ?

[Sarah-jrnq]

hi sir. im scared to ask my own teacher about this because it might seem like a small matter. if i write more than 2 significant figures for my answers, would there be penalty? for example, 4223.5, or 0.235 V when the given voltage only 2 s.f. would i be penalized in any way? 😢

[dhrubokarim]

23:29 if we keep the absolute value at 3 sgf then can't we keep the uncertainty at 2 sgf? Can't we write 2340 +- 49?

[toothless_]

i just came across ur channel today
tyyy sooo much for the detailed explanations really really helpful
prayers up for ur channel to grow even more