lpx88 SG yea..supposed 2 be curve...but drew straight line..but some tcher sayin both accepted..k la..1 mark gone for this and 1 mark gone for explanation of the very last question
lolhahalol SG i only had 7 pts for the graph. I think the one without any resistor is another set of value so u will have a total of eight. Anyone know how to do the determine pd across ac? I put 3V cause i felt it was parallel to the power supply.
kct360 SG first thing i screwed up. i measured the emergent ray wrongly. 2nd, determination of c, critical angle. dont know how to do. third, graph of Vbc against R i joined to 0. 4th. dont know how to do the last part on explanation.
lpx88 SG No 1 i heard of used the resistor W leh i got 2.5....i asked everyone also 2.sth..i think there's some leeway and amrgin for error la That experiment plan giveaway one..just repeat experiment with different values and plot sin i against sin r. Gradient is n. Critical angle is sin inverse (1/ gradient)
fstein SG same mistake... i ish also draw line only got 6 pts also... i forgot the combi of all 3 resistors...
lpx88 SG X2.Funny sia.At 1st i blut blur go connect wire to find the potential btw AC Whoa overshoot the 3V mark on the Voltmeter
kingkungfu SG how to do chemistry extention questions.meaning the last past of the chem practicals.btw i take sub science(chem)
fstein SG read up on all the past practicals you did... gas syringe exothermic all those today my titration reading 25.8 25.6 25.6 lead (II) oxygen NO3^-
lpx88 SG Chem 20.2cm^3 Titration dam scary sia..at 1st i got 19.sth...then i realised the grey colour is actually not pure..has a magenta tinge...so i redo and got my readings in the 20's range...which is what most got.. Lead Iron(I know it's wrong.When i heat solid R nothing jus seem to come out of it) NO3-
fstein SG i got a orangey colour did you add indicator it's supposed to be red - orangey - yellow orangey is the neutral point my molar conc of the hcl is 0.102 mol/dm^3
fstein SG yah nothing came out for me too.. but my friend got like a mini explosion when he did it heheheheh it was so obvious
