Physics Paper 12 How was it

[Saad Sarfraz]

yes exactly i chose that option.. i guess i chose B, but i thought i chose C.. but i remember choosing the option u just said, oh thank you and thank god ..

Lol. Man it was D for sure caz there calculated value was correct 0.64 sec..use 2as=v^2 - u^2 and u'll find the correct ans of time had to be 0.637...while B option said that the measurements were inaccirate..

 

[MOMO123123]

Lol. Man it was D for sure caz there calculated value was correct 0.64 sec..use 2as=v^2 - u^2 and u'll find the correct ans of time had to be 0.637...while B option said that the measurements were inaccirate..

i have no idea.. i forgott everything, but the measurements were accurate thats for sure, because acceleration turned out to be 9.7something or 9.8 if i remember correctly

 

[good man12]

Sorry bro but its C the distance between collisions increases...

dude, they asked what does not occur, what you stated DOES occur when volume inreases, its ovbious, the distance bw collisions WILL increaes, so option was incorrect, D was right option,

 

[Ahmed Tariq]

Sorry bro but its C the distance between collisions increases...

You are, I'm afraid, totally on the wrong side.

 

[Ahmed Tariq]

Anybody remember the two MCQs not on the list compiled by good man12?

 

[Silent Hunter]

not yet

 

[abdullahsatar]

dude, they asked what does not occur, what you stated DOES occur when volume inreases, its ovbious, the distance bw collisions WILL increaes, so option was incorrect, D was right option,

Mate they wrote that the pressure remains the same. Since the pressure is same, the volume will obviously remain the same.

 

[AppleGreen]

Mate they wrote that the pressure remains the same. Since the pressure is same, the volume will obviously remain the same.

but i thought that they mentioned that they did pull out the piston or something?

 

[avenger]

Mate they wrote that the pressure remains the same. Since the pressure is same, the volume will obviously remain the same.

the pressure remains the same coz they pulled out the piston. So the volumes has increased by pulling out the piston BUT since the pressure is same the frequency of collisions will not increase. so the ans is D

 

[MOMO123123]

the pressure remains the same coz they pulled out the piston. So the volumes has increased by pulling out the piston BUT since the pressure is same the frequency of collisions will not increase. so the ans is D

but i think they said they warmed the piston, so temprature increases.. if temprature increases volume must increase to maintain the same pressure am i right? :S

 

[iceman]

Anybody remember the two MCQs not on the list compiled by good man12?

only one MCQ was missing nd it was the one in which they asked 'what is correct when the projectile was at its highest point"...nd its ans was A

 

[MOMO123123]

can anyone sum up all the 100% correct answers?

 

[good man12]

can anyone sum up all the 100% correct answers?

from my list, i suspect that only the ladder one, the pressure one, the momentum one and 1 more may be incorrect, all others i can gauranteee are correct..

 

[MOMO123123]

i have the exact same answers as urs.. except for the copper wire and momentum, i just have the copper wire thing wrong.. i guessed it in the exam anyway :S..
i think the ladder one is incorrect, and pressure one D and the momentum D are right for sure

 

[Mattman]

So i went through the questions with my teachers and i got 31/40. Is it enough for an A ?

 

[bnezy00]

mine was Awesome it went very gud i expect more than 30 if the threshold is 28 then...
and ya that last one answer i think it was wrong of mine what was the answer???

 

[avenger]

but i think they said they warmed the piston, so temprature increases.. if temprature increases volume must increase to maintain the same pressure am i right? :S

thats what i am saying, volume does increase...momo hi ho

 

[Saad Sarfraz]

dude, they asked what does not occur, what you stated DOES occur when volume inreases, its ovbious, the distance bw collisions WILL increaes, so option was incorrect, D was right option,

D was number of collisions per second increases..which was obviouslyy right...common concept..and the distance btwn molecules increases..not collisions...

 

[MOMO123123]

what about the ladder one? wt did u conclude it was?
and what about the determining g?

 

[xcalibur]

Once you increased the volume to keep the pressure constant, distance between collisions would increase. You pulled out the piston man, now the molecules have to travel further to collide.