Physics: Post your doubts here!

[armeena]

I did. Did you use the tangent to calcualte the activity of the nucleus in the second to last Q?? I didnt...

i used a tangent

i added them since its gotta pass through both capacitor AND muscle???
and also the capacitor has same charge as I * t right

i think it was multiplied, had a similar question in our mocks. but the Io thing confused the hell out of me. and yes, it had the same charge, i think? I'm so unsure about all my answers. why did they give the frequency as 50 though? some people used it to calculate charge, and it kind of made sense.

 

[armeena]

lol i guess itll hit an early 50 for both
wut was so shitty abt it btw?

there were a bunch of new conceptual questions. there was a particular question no one could solve- sand was placed on an oscillator of s.h.m and then the amplitude was slowly increased till it slid off. they asked to find the new amplitude. everyone was like lolwot

 

[ThePacifics]

the first part said in ONE second, idk why would we use it in that part and i was thinking we should use it but it only asked for ONE time charge up why would I multiply by 50? so like did the whole batch find it hard?

 

[ThePacifics]

there were a bunch of new conceptual questions. there was a particular question no one could solve- sand was placed on an oscillator of s.h.m and then the amplitude was slowly increased till it slid off. they asked to find the new amplitude. everyone was like lolwot

IKR HOW TF DO I FIND IT THERES NO INFO GIVEN I LOST IT AT THAT QUESTION

 

[MarcosT200]

i used a tangent

Do you think you get any marks for using the exponential curve equation and given the half life?

i think it was multiplied, had a similar question in our mocks. but the Io thing confused the hell out of me. and yes, it had the same charge, i think? I'm so unsure about all my answers. why did they give the frequency as 50 though? some people used it to calculate charge, and it kind of made sense.

I multiplied too. I divided the total charge by 50.

 

[MarcosT200]

how was p41? did you guys find it hard?

Yes.

 

[anastasia grey113]

there were a bunch of new conceptual questions. there was a particular question no one could solve- sand was placed on an oscillator of s.h.m and then the amplitude was slowly increased till it slid off. they asked to find the new amplitude. everyone was like lolwot

damn i guess the Exam board was pissed off at making such an easy paper in 2017

 

[MarcosT200]

there were a bunch of new conceptual questions. there was a particular question no one could solve- sand was placed on an oscillator of s.h.m and then the amplitude was slowly increased till it slid off. they asked to find the new amplitude. everyone was like lolwot

I got 17.3 mm for the amplitude question on SHM... you?

 

[ThePacifics]

Yes.

I didnt use tangent, i just used the simple half life to carry out the equation. because in books they just took simple half life from the decay curve?

 

[ThePacifics]

I got 17.3 mm for the amplitude question on SHM... you?

did anyone get 4 hz for the frequency and 10^22 kg for mass of that star

 

[MarcosT200]

did anyone get 4 hz for the frequency and 10^22 kg for mass of that star

I got 3.8Hz....

 

[MarcosT200]

yea

I didnt use tangent, i just used the simple half life to carry out the equation. because in books they just took simple half life from the decay curve?

yeah but i think they wanted you to use the gradient.... cause in part b they said without calculating the half life...

 

[ThePacifics]

I got 3.8Hz....

yeh same i got 3.77 i mean rounding off depends haha

 

[armeena]

I got 17.3 mm for the amplitude question on SHM... you?

i couLDNT EVEN SOLVE IT?? how did you even attempt it

 

[armeena]

I got 3.8Hz....

same ^

 

[MarcosT200]

i couLDNT EVEN SOLVE IT?? how did you even attempt it

Resolving forces and setting the normal force to 0N

 

[ThePacifics]

Resolving forces and setting the normal force to 0N

this wasnt even mechanics CIE needs to fix their bullshit we dont do this in physics A level syllabus im off to sue

 

[MarcosT200]

wha

same ^

what did you write for the Op amp question on how to measure change with light intensity...?

 

[MarcosT200]

this wasnt even mechanics CIE needs to fix their bullshit we dont do this in physics A level syllabus im off to sue

Yeah I managed to think about it using my knowledge of mechanics from further...pufff

 

[ThePacifics]

do yall think the grade threshold for A can be atleast 60? because even last years papers had 65 and 55 and this years was much diff than last ones