Edexcel Physics Unit 4 - 21st June 2011

Reply 500

black-chaos-master

2

so loss of mass 29 U any1??? or was it 9 U .. i really cant remember .. but that 9 was there for sure .. lol

Reply 501

deepakpitrola333

what was the mag field question, please describe

Reply 502

inspiringsoul

2nd last ques ws weird, n didnt get 'confirm mass of sulper ion is 0.00001u ??!!!!
frm where do they get such ques? lol.

Reply 503

aym3n

Original post by black-chaos-master

Lol ok screw the momentum easy question .. :P ... what about the magnetic field question .. i think da 2nd last question ....

oh im gonnnaaa cry :'( i dunno about the first part cuz i just converted the u into kg and the second part was that u had to find the delta mass and then convert it to u to prove

Reply 504

Slowbro93

20

Original post by black-chaos-master

Lol ok screw the momentum easy question .. :P ... what about the magnetic field question .. i think da 2nd last question ....

cyclotron bit was easy enough

then the formula proof was nice

the electric field i had to think about, but then realised that it was positive charge, so they would repel and therefore not move vertically

then it asked for something about 3 parts in a million of a mass, that was good

the change in mass, I worked out the change in mass, but didn't know what to write as the conclusion

Reply 505

Slowbro93

20

The lost in mass, I got a really small u

Reply 506

aym3n

Original post by Vampire-Love4ever

I have to count how much marks I am getting not losing. :frown:

im losing more than 20 here :eek:

Reply 507

inspiringsoul

Original post by cpdavis

cyclotron bit was easy enough

then the formula proof was nice

the electric field i had to think about, but then realised that it was positive charge, so they would repel and therefore not move vertically

then it asked for something about 3 parts in a million of a mass, that was good

the change in mass, I worked out the change in mass, but didn't know what to write as the conclusion

oh, how did u do the 3 parts in a million of a mass :confused:

Reply 508

deepakpitrola333

i got a small u but a bit bigger than 0.000000000000000000000001u like they said it can measure to

Reply 509

aym3n

Original post by cpdavis

The lost in mass, I got a really small u

yeah like 0.00002 r sth im guessing

Reply 510

ljarc

the conclusion is that the device would be able to detect the mass deficit because we calculated in the previous question that the smallest value it detects is like 0.000001 or something and the mass deficit answer should be larger than that

Reply 511

aym3n

how do we prove de brogli's equation? i got confused for h^2 :s

Reply 512

Vampire-Love4ever

OP

13

Original post by aym3n

im losing more than 20 here :eek:

I am leaving. I am gonna get a heart failure if I stay here any longer. I don't wanna think about this paper. No point now.
Just gotta prepare for Chemistry now and work extra hard for Physics 5. :frown:

Reply 513

Slowbro93

20