Urgent Help in pHysics

[utsav156]

hey can anyone tell me the evidences and principles of milikan's oil drop experiment and photoelectric effect.

P.s can anyone tell me where shall i practice questions for phy planning other than that of the past questions???
quick quick quick quick reply!!!!

 

[princesszahra]

hey can anyone tell me the evidences and principles of milikan's oil drop experiment and photoelectric effect.

P.s can anyone tell me where shall i practice questions for phy planning other than that of the past questions???
quick quick quick quick reply!!!!

http://en.wikibooks.org/wiki/A-level_Ph ... ng_Physics)/Millikan's_Experiment

pastpapers are enough for P5

 

[utsav156]

hey princess zahara thanks one more thing can u tell me where can i get the practice questions for application part!(other than past papers)

 

[princesszahra]

hey princess zahara thanks one more thing can u tell me where can i get the practice questions for application part!(other than past papers)

You can check this one!http://www.physicsclassroom.com/class/energy/u5l2bc.cfm

 

[AayushR]

What should suffice for P4?

 

[filza94]

FOR Chemistry PAPER 33!!!!!!!!!!

hydrated ammonim salt titrated with KMnO4
usual salt analysis
one thermal question

We have to titrate ammonium nitrate with KMn04 or would we need to oxidize potassium iodide in the presence of ammonium nitrate and then titrate the resulting solution with sodium thiosulphate? :|

see question no.1 in june2008-31
a similar question is expected!


FOR PHYSICS ASLEVEL PAPER 33

what we hav been practicing is the electricity one with beads in place of resistors.its very simple..and ya in the oscillation one we will be having a cylinder instead of a pendulam bob..

i doubt anything concerning magnets or diodes on A2 level will come for As practicals, hmm, they might just be giving diode as just another component of the circuit system, in past years there were things like that, but the procedure is still the same, you will just have to either measure current, volt etc. and draw the graph, and by the way it will be helpful to review the graphs for diodes. before going for exam.

YOU WILL NEED
1.retort stand.
2.bob/cylinder
3.stopwatch.
4.thread
5.multimeters
6.batteries
7.clamps.
8.resistors.
9.contacts

 

[AayushR]

That would help indeed.

Bdw, what's your source?

 

[utsav156]

hey and what about the Physics Paper 34????

 

[filza94]

my teacher okay n i hav no idea abt 34....

 

[zahraahmed]

ohhh sorrieee i did it bymistake......................

 

[filza94]

http://notezone.net/cambridgechem/chemi ... sis%5D.pdf can sum1 go in dix page 11 n do solve n gimme answers plzzzz i cant able to slove it n it might cum for exam help mee!!!!

 

[filza94]

wil u stop zahra......@@@@@@@@

 

[utsav156]

BUt what about chem P33????
are u sure about the recent fact?

 

[filza94]

hassam said this.....
below answers for http://notezone.net/cambridgechem/chemi ... sis%5D.pdf for pg 11

First of all you need the mass of FA1. In the first table you have the mass of the empty test tube and the mass of the test tube + FA1. All you do is subtract the values 12.80 - 10.50 giving you 2.30g of FA1.

In the second table you need the mass of FA1 after heating. Again, you just subtract the values 11.76 - 10.50 = 1.26g FA1 after heating.

1 d. (i) The mass of anhydrous XS04 present in the crystals is what is left over after heating = 1.26g

1 d. (ii) The mass of water driven from the crystals is the loss in mass that has occurred when the FA1 was heated. Before heating there were 2.30g of FA1 and after heating there were 1.26g. So the mass of water lost is 2.30 - 1.26 = 1.04g

1 e. To calculate the number of moles of water in the sample of FA1 you use the formula no. of moles = mass/mass of 1 mole which gives you 1.04/18 = 0.058 mol

1 f. The number of moles in XSO4
7 moles of H20 gives 1 mole XSO4 (from the formula XSO4.7H20)
So 0.058 moles of water give 0.058/7 = 8.29 x 10 ^ -3 moles of XSO4

1 g. To calculate the relative formula mass of XSO4 you use the formula mass of 1 mole = mass/no. of moles which gives you 1.26/8.29 x 10 ^ -3 = 152.7

1 h. To calculate the Ar of element X you first find the Mr of SO4 which is 32 + (4 x 16) = 96
You subtract this from the RFM from part g giving you 152.7 - 96 = 56.7

 

[utsav156]

hassam said this.....
below answers for http://notezone.net/cambridgechem/chemi ... sis%5D.pdf for pg 11

First of all you need the mass of FA1. In the first table you have the mass of the empty test tube and the mass of the test tube + FA1. All you do is subtract the values 12.80 - 10.50 giving you 2.30g of FA1.

In the second table you need the mass of FA1 after heating. Again, you just subtract the values 11.76 - 10.50 = 1.26g FA1 after heating.

1 d. (i) The mass of anhydrous XS04 present in the crystals is what is left over after heating = 1.26g

1 d. (ii) The mass of water driven from the crystals is the loss in mass that has occurred when the FA1 was heated. Before heating there were 2.30g of FA1 and after heating there were 1.26g. So the mass of water lost is 2.30 - 1.26 = 1.04g

1 e. To calculate the number of moles of water in the sample of FA1 you use the formula no. of moles = mass/mass of 1 mole which gives you 1.04/18 = 0.058 mol
1 f. The number of moles in XSO4
7 moles of H20 gives 1 mole XSO4 (from the formula XSO4.7H20)
So 0.058 moles of water give 0.058/7 = 8.29 x 10 ^ -3 moles of XSO4

1 g. To calculate the relative formula mass of XSO4 you use the formula mass of 1 mole = mass/no. of moles which gives you 1.26/8.29 x 10 ^ -3 = 152.7

1 h. To calculate the Ar of element X you first find the Mr of SO4 which is 32 + (4 x 16) = 96
You subtract this from the RFM from part g giving you 152.7 - 96 = 56.7

hey its strange i couldnot open the link above it says page nt found!!!

 

[filza94]

hmm okay..

 

[utsav156]

SORRY my bad

i couldnt open the link!!!!

 

[filza94]

leave it jux go on dix plzzz n ask for details viewtopic.php?f=26&t=1370 fast fast these ppl hav given there exam paper 33 chemistry n get details

 

[utsav156]

leave it jux go on dix plzzz n ask for details viewtopic.php?f=26&t=1370 fast fast these ppl hav given there exam paper 33 chemistry n get details

hey hey thanx a lot dude!!!
can u find out the details of p34
and ya i heard that this tym ther is no elctricity is it true????/

 

[nisurju]

do u knw which countries are takin physics variant p4?
and what do u think will be the threshold for physics this year?