HOW WAS PHYSICS PAPER 2 AS!!!!!!!!!!!

[Unicorn]

The paper was either TOO long for 1 hour or 1 hour is TOO short for the paper... :/
I cudnt draw the graph

graph??????

 

[Taimoor93]

i remember one of the question ask what is the wavelength
neway, what u guys got for the Tension T??

1570 N

 

[Taimoor93]

And change in PE?

2.0 joules

 

[Taimoor93]

guys for the Young Modulus graph u have to draw, the gradient is twice the given graph right?

gradeint was half

 

[nafeekhan]

Just so u know E=mc2 is in A2 but yeah ur answer is right.

Also, if you'd help me with one of the other answers that'd be nice,

its regarding uncertainty value.. there were 4 quantities given "v/t", "P", "l", "r".. in the equation it was r^4 so we multiply the uncerainty by 4.. BUT..
we are suppose to take the inverse of "v/t" so uncertainty value of this quantity will be multiplied by -1 but I, by mistake forgot to multiply -1 and hence I ended up adding all the values together..

besides that one thing, my method was correct will I get marks out out of 3?

 

[Taimoor93]

my KE was 1. something and PE was 0.44 for ke it was simple just subtract two kinetic energies! for pe find the rebound height of the ball and use mgh

u just have to calculate initial KE... final KE was 0... and i got 2.0 for PE

 

[Taimoor93]

How did u ppl gt d tension in d string nywy??

650 + 450gsin12

 

[JD REBORN]

Also, if you'd help me with one of the other answers that'd be nice,

its regarding uncertainty value.. there were 4 quantities given "v/t", "P", "l", "r".. in the equation it was r^4 so we multiply the uncerainty by 4.. BUT..
we are suppose to take the inverse of "v/t" so uncertainty value of this quantity will be multiplied by -1 but I, by mistake forgot to multiply -1 and hence I ended up adding all the values together..

besides that one thing, my method was correct will I get marks out out of 3?

What u said there,i didnt understand how?

 

[JD REBORN]

2.0 joules

Can anyone plz explain the method to find K.E and P.E

 

[citrussino]

Physics 21 was awesome!

 

[nafeekhan]

What u said there,i didnt understand how?

didn't you solve the uncertainty question ?

 

[good man12]

ITS 1000Hz for sure.....people who r telin 500Hz made mistake in cm to m conversion.....ma whole class got 1000hz ...abt 56 students...LOL...still 500hz people thnk its wrng??lmao

hahahahah..............wrong..!!!!! lambda was obviously 68 cm...convert to metres.......= .68m....the 340/0.68....= 500Hz.....simple as that........if any one got answerlike 1000 means he took lamba has 38 which was wrong and the trick in the ques which apparently will loose 2 marks out of 3

 

[good man12]

Also, if you'd help me with one of the other answers that'd be nice,

its regarding uncertainty value.. there were 4 quantities given "v/t", "P", "l", "r".. in the equation it was r^4 so we multiply the uncerainty by 4.. BUT..
we are suppose to take the inverse of "v/t" so uncertainty value of this quantity will be multiplied by -1 but I, by mistake forgot to multiply -1 and hence I ended up adding all the values together..

besides that one thing, my method was correct will I get marks out out of 3?

you are correct...dont worry, no need to take inverse, you are just dividing by 1.2 * 10^-6 on other side.....so take into account the simple uncertainti +-0.01.....no need for minus sign

 

[Ahmed Tariq]

Mr lamao distance between two nodes was 0.34 m and in a STATIONARY wave distance between two nodes is lambda/2=0.34 m.Now prove how i am wrong

Sorry if my memory is playing tricks on me, but wasn't the distance between two antinodes 51-34=17cm?

 

[Ahmed Tariq]

And anybody remember the answer to the last part of question 2? The energy changes?

 

[m.r92]

WHat do you reckon the grade threshold will be for paper 52?

 

[m.r92]

Fuu.. I meant paper 22

 

[Rakayz]

hey guys! i know paper was gud for most of the people.! I am happy too about it....ALHAMDULILLAH

if u dont mind, i have a doubt in practicles: w11-qp-34...question 2) f-i & f-ii

thanks

 

[Rakayz]

Fuu.. I meant paper 22

i think it might b 35...

 

[A.ELWY 7]

um guys pls im confused...can when anyone talk about their paper they say what variant it is