Physics: Post your doubts here!

[Zaki ali asghar]

so the majority of the people i know somehow found P5 difficult, i hope the threshold for A is at 20.

 

[Zaki ali asghar]

imagine my value of R came negative as first, ;_; turned out my expression for gradient was wrong, corrected it and then again corrected the C and R parts in the last 5 mins.

 

[anastasia grey113]

so the majority of the people i know somehow found P5 difficult, i hope the threshold for A is at 20.

imagine my value of R came negative as first, ;_; turned out my expression for gradient was wrong, corrected it and then again corrected the C and R parts in the last 5 mins.

well at least u corrected it so i guess it went well for u
yh well lets hope its very very low
i dont want the overall gt to exceed 190

 

[Zaki ali asghar]

i hope it's around it's in 180s. chemistry threshold worries me, i hope it won't shoot 200. PLEASE.

 

[anastasia grey113]

i hope it's around it's in 180s. chemistry threshold worries me, i hope it won't shoot 200. PLEASE.

no i dont think it will
cuz like p5 was a lil hard

 

[xuan13]

hello. what were you supposed to do in Q1 of paper 52 physics? The wavelength/CD/Light one.

 

[anastasia grey113]

hello. what were you supposed to do in Q1 of paper 52 physics? The wavelength/CD/Light one.

well v were supposed to use lights of different wavelengths
and had to measure h using a ruler
thats wut i wrote
wbu?

 

[Holmes]

PLZ HELP ME
i got an A overall in AS
but a B in p3
n in MCQs i got an A but m sure it was a close one
my theory went fine...ill get an 80 or above that
but i messed up my p5
i might get 21 or 22
can i still get an A*?
Zaki ali asghar Holmes haithsoul Error Syntax guys plz help

I think you surely will INSHALLAH
what did you got in P22

 

[anastasia grey113]

I think you surely will INSHALLAH
what did you got in P22

idk wut i got but i think it was a 50-54

 

[Holmes]

idk wut i got but i think it was a 50-54

Inshallah you will.

 

[anastasia grey113]

Inshallah you will.

yh IA
same goes for u

 

[Tauqir_hamed]

Lambda independent, h dependent
Use the same cd throughout and the light should fall on the cd always at the same angle
Use different lasers
Pass the light through a slit
Using different lasers means different wavelengths of light
Measure height using a clamped rule
Take repeeated readings for h and avg them
Now lambda is changed until we have 8 sets of readings
Plot a graph of height against lambda
Straight line that doesnt pass through origin
y intercept gives B , gradient gives n / d

Paper 52 question 1.. are these points okay ?

 

[selrey]

Does anyone remember the equation for Q2 p5? And what was the expression for gradient?

 

[Zaki ali asghar]

Does anyone remember the equation for Q2 p5? And what was the expression for gradient?

-Cln(1-V/E) i wrote Cln(E/E-V) tho, both should be fine.

 

[selrey]

-Cln(1-V/E) i wrote Cln(E/E-V) tho, both should be fine.

Ughhh i messed up the gradient expression. Do i get an ecf in the other parts? ;-;

 

[Zaki ali asghar]

Ughhh i messed up the gradient expression. Do i get an ecf in the other parts? ;-;

yh u'll prolly lose just one mark, if you equated your expression to find the value of C and then same value to find R. i think or max 2.

 

[Jihoo Lee]

Where can I get worked solutions of recent(2016 and 2017) physics paper 1?

 

[Jihoo Lee]

How was paper 22

I guess not really difficult. No questions asked about double slits and diffraction grating where I felt difficulties. Dynamics question was a bit tricky however.

 

[NenikW1N0]

Where can I get worked solutions of recent(2016 and 2017) physics paper 1?

Check practice-physics-exams. com. It is free but you will have to log in however.

 

[hellodjfos;s'ff]

Where can I get worked solutions of recent(2016 and 2017) physics paper 1?

You can get the solved past papers book from any bookshop. If that is an expensive method(yeah it is not cost-effective), you may search this stuff on google or youtube. You would find at least a couple of them on youtube and google.