Sarahisme

hey peoples, just wondering, does anyone know how to calcualte the error in a gradient (i.e. in a line of best fit) when the graph is plotted using excel, as there is only one line of best fit... ?? Thanks Sarah

lol, this is along shot, but Kandi or budullewraagh you wouldnt happen to know the answer to this... http://38.118.74.97/forums/showthread.php?p=172871#post172871 ?? Thanks Sarah

yeah i have done that, but i was thinking that there would be a value for the yield that is got when it is done in industry or something like that...? thanks for replying btw

lol, anyone at all?

so once again, thanks all for ya help

ok, thanks thanks everyone for your help!

oh and likewise for paracetamol (if anyone knows where this kind of info. exists ) ?

oh yeah, i meant to ask... where can i find this kind of information? (or this specific piece of information?)

hey i am writing up my prac on the preparation of aspirin, and just can't seem to find any information on what the "published" or "accepted" yield is. In my experimetn i got 86% (which i think is a little high). Cheers Sarah

yeah i thought so, just checking thankss mezarashi

ok thanks guys

cross sectional area doesnt change, so resistance only depends on length..? it was more the ssecond question which i was unsure about

oh btw, were my justifications correct? or i suppose did they justify my answers??

yeah it has only 2 ends doesnt a comutator need to be put somewhere within the generator or something like that , and so makes the design much more compicated, whereas a rectifier changes it to dc current after it has been generated as ac current in the generator??

wait a second there isnt more than one of those options that are correct are there? ie. e is the ONLY correct answer...?? right? cause i think it is...

ok i think i understand it now, thanks guys

lol, well it is now also saved on my computer too

oh single coil winding? do you mean is there only one coil? because there is say a square with a wire wrapped 50 times around the squares circumfrence..

no , i estimated about 50 coils

well i have the coil spining inside the magnetic field, sorry bout that, its too late to change it now (dammit! ) so do i still need the slip rings? and/or the diode rectifier??

oh and i am talking about the most basic possible ac generator here

if i am trying to charge a battery (or store energy in a battery i suppose) using an ac generator would i need a commutator and/or slip ring things?

so yeah i think what you said is correct

however the rest of the question leaves me a little stumped

is the current in the circuit just I = 2.5 A ??