Physics Significant figures

[ammarelahi]

To how many Significant figures and decimal places should the answers be given in phy P4 ??

 

[ammarelahi]

???

 

[beacon_of_light]

Well a general rule is: if the values used to calculate the answer have different significant figures say 0.12, 0.23, 2.3 ... the answer must be given in the least sig. figure found in the values...here it is 2 sig. figures corresponding to a value of 2.3 ... so the answer must be to one decimal place or 2 significant figures..

But i've seen this isn't implied in the mark schemes ...

 

[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