i dunno my text book said differently and i was going by exam, in all hoensty i think either will get u the mark, as the temp of the hot source is the initical temperature of the system, and the cold sink is the final temp of the system.
k then, don't know anymore, why are these questions like this, don't they want us to attain 100%. By the way, how was Physics 1 GUYS?
Just remembered I forgor to change 4.2g into kg.
Hopefully I still did well.
We had to use that rate of temp in the next question. Since I used the wrong rate of temp will I still get marks on qs where you to find power(rate of energy)?
No...as long as you did everything right...it'll be error carried forward and you'll get all marks for that.
80-093% in phy1
96-100% in phy2
80-097% in phy3
Now im gonna start revising phy4-phy6, and hopefully get 95-100% on phy4,phy5 to take strain off phy6.
[QUOTE=Narin]No, you're definately right... it's all these other people that are wrong.
hurrah well that means the very few of us who put 10Mohms can be looking and rather high marks, oh sum1 that repleid to me earlier, i only did phy2, it was a retake, i got 80/90 last time, but want to point incase i ruin phy6 lol
the resistor one i just redrew the circuit but did you guys leave the voltmeter in? and when you did this and u got the resistance for the v2 AND the resistor so i ended up doing rations until i got a resistance of like 4.82 m ohms? is this wrong the question really didnt make it clear. the heat engine wasnt too bad i just put in numbers til i gto a sensible answer like 42 degrees or sumthin.
heat engine =>
0.53 = [t1-t2]/t1
btw, taylor you are right for the resistor question...i didn't take in account for the voltmeter that was in parrallel to it, so i probs lossed 1 mark.