Edexcel A Level Physics Advanced Physics II 9PH0 02 - 9th June 2023 [Exam Chat]

Original post by econminho

did people say image distance equals focal length because the object is too far away it tends to infinity, so it can be ignored in the equation

Yes

Reply 82

Original post by robbie1172

for the work function one, i got the energy to be slightly higher than the work function, (0.32 or something) and i think that means it works becasue photoelectrons can be emmitted

yeah same but I converted ev into joules, but same conclusion

Reply 83

Me_43

4

Do you use keplers law for last question ?

Reply 84

Original post by econminho

yeah same but I converted ev into joules, but same conclusion

Same thank god

Reply 85

shad muhammad

7

Original post by econminho

did people say image distance equals focal length because the object is too far away it tends to infinity, so it can be ignored in the equation

yh

Reply 86

Original post by Griff Dog

Same thank god

why? why were you worried about that

Reply 87

Original post by Me_43

Do you use keplers law for last question ?

Ye

Original post by econminho

why? why were you worried about that

Yh the conclusion. Also want to bag as many marks as possible innit - tbf I don't think too much went wrong

Reply 88

Wait does anyone remember the values for the work function q? also what frequency did yall use for that

Reply 89

Original post by Griff Dog

Ye

Yh the conclusion. Also want to bag as many marks as possible innit - tbf I don't think too much went wrong

oh right. for the joules value what did u get? do you remeber what value you got as your joules for that question?

Reply 90

Original post by AceRox

Wait does anyone remember the values for the work function q? also what frequency did yall use for that

did you do it in joules or ev

Reply 91

Original post by econminho

did you do it in joules or ev

joules, i converted 0.30 into joules and used that for the rest of the calc. but I said it doesn't detect. idk if I made an error in the actual calc

Reply 92

Original post by AceRox

Wait does anyone remember the values for the work function q? also what frequency did yall use for that

HC/lmada where lamda was the 4.0 one

Reply 93

what did people get for the assumption to derive hubble constant equation. I just said velocity is the speed of light had no clue. and for the parsecs one I got 75.5 which is in the range. for frequency i got 0.6 something. for the butane gas one did you mention potential energy change in change of state and stuff?

Reply 94

Original post by AceRox

joules, i converted 0.30 into joules and used that for the rest of the calc. but I said it doesn't detect. idk if I made an error in the actual calc

I got like 7.24x10^13 for the work function and the calculated was 7.5x10^13

Reply 95

did people get 356 or something for the rms

Reply 96

Original post by econminho

what did people get for the assumption to derive hubble constant equation. I just said velocity is the speed of light had no clue. and for the parsecs one I got 75.5 which is in the range. for frequency i got 0.6 something. for the butane gas one did you mention potential energy change in change of state and stuff

wait which question is the 0.6 hz for? shm or space?

Reply 97

Original post by AceRox

wait which question is the 0.6 hz for? shm or space?

shm

Reply 98

robbie1172

2

Original post by econminho

what did people get for the assumption to derive hubble constant equation. I just said velocity is the speed of light had no clue. and for the parsecs one I got 75.5 which is in the range. for frequency i got 0.6 something. for the butane gas one did you mention potential energy change in change of state and stuff?

i got the same for the parsecs one. and for the butane i said the latent energy of vapourisation reduces the total energy so it cools down

Reply 99