How was Physics 42?

[ganapathynar]

the original system, because it said its back at 297 K

 

[ganapathynar]

What was the rise in temp?

i think 40 if i am not mistaken

 

[afoo.666]

i think 40 if i am not mistaken

How did u calculate it?

 

[ganapathynar]

i found the moles of gas in the first part right? and we know the change in internal energy, so i used basic propotionalities

How did u calculate it?

 

[ganapathynar]

it said something in the beginning of the question like 12 J is required to change 1 mol of gas by i degree kelvin

How did u calculate it?

 

[fathimaash]

Yaa its 40..
0.190 mol produces 95j
1 mol produces 500j
Den u knw dere is a change of 1K fr 12.5j so fr 500 j hw much.. xactly 40K.

How did u calculate it?

 

[afoo.666]

Yeah. Explain a bit more? Did that 40 answer helped you to compl the next part? Were you able to show that Pressure is 2.50 x 10^5?

 

[afoo.666]

Yaa its 40..
0.190 mol produces 95j
1 mol produces 500j
Den u knw dere is a change of 1K fr 12.5j so fr 500 j hw much.. xactly 40K.

Got it. Thanks
What about Capacitance? What was it? In pF.

 

[fathimaash]

Got it. Thanks
What about Capacitance? What was it? In pF.

I cnt remember.. wat did u gt?

 

[afoo.666]

I cnt remember.. wat did u gt?

5.00 x 10^ something.

 

[afoo.666]

10^-18 i guess.

 

[billy boy]

Got it. Thanks
What about Capacitance? What was it? In pF.

it was 50

 

[afoo.666]

it was 50

Damn. I messed up in conversions :L

 

[anishniroula]

i think it was 50 or 80 pF.

 

[billy boy]

i am damm sure it was only 50p ans will will 50 only

 

[billy boy]

can any one explain why difference in Z1 and Z2 was important

 

[littlecloud11]

How unoriginal was CIE with section A?
Every single part of every question was a repeat.
Question 9 was the only new question in the entire paper, and that too was easy.
Talk about not being predictable, they throw P3 at us two days ago and then come up with this paper.

 

[littlecloud11]

i am damm sure it was only 50p ans will will 50 only

It was definitely 50.

 

[FRENZYAMU]

can any one explain why difference in Z1 and Z2 was important

i wrote different reflections on different bounderies will determine thickness of corresponding media......i messed up last part of photon question cuz i didnt understand it

 

[FRENZYAMU]

the gas system in question 2 part (b) doing 120J of work, which gas system does it refer to? Heated one or original gas system?

i dont know but i wrote change in internal energy ws zero, there was a rise in temp cause workdone ws negative so by equation it ws 0 = Q - W therefore W = Q......ohh i hope its right !!!!