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let me know if you dont understand anythingDrag it from your PC folder to the writing box here. or from phone just click "upload a file" button beside the "post reply button and find the file...
Thanks. That helped a lot.let me know if you dont understand anything
what is the answer?How do we do this? :'(
Is it 4 or 3.5?How do we do this? :'(
Is it 4 or 3.5?
oh okay.It's 3.5 so they've rounded it off to 3. :/
880 + 200 gives us 1080How do we do these graph questions?
Fb is 188 N.
I've also attached the question paper!
http://onlineexamhelp.com/wp-content/uploads/2014/08/9702_s14_qp_21.pdf
880 + 200 gives us 1080
upward should be equal to downward forces for the plank to be in equlibrium
so we want 1080 upward force. now look athe graph , when the value of FA is 100 then the value of Fb should be 980 to give us the force of 1080. right? plot the graph like this. you will get the straight line in the other direction , with the positive gradient
WelcomeThank you so much!
Also, for this question, To find the total EMF, why are we subtracting 12 from 20? Shouldn't we be adding to find the total emf? :s
and for part (ii) , why can't I use the formula P=V2/R to find the power of G?
Welcome
erm are you sure you posted the right screen shot?
Any rules you might know of working with sig figs? I mean I know the idea but is there something you're likely to confuse in the exams?Try to ask your lecturer to let you in for at least 1 lesson. Other than that, there's not much you can do for the practical. Just make sure to read the instructions carefully and don't waste marks unnecessarily on careless mistakes like significant figures. Really watch your significant figures. Good luck!
For the practical, make sure you standardize all of the sig fig for the measurements and calculations that you do. For example, you are plotting a graph of resistance against length. The resistance is from the resistors that you alter. The sig fig for these values don't matter because you aren't measuring it. However the length you are measuring, hence the sig fig matter. Then the values for gradient and etc must also have the same sig fig as the length.Any rules you might know of working with sig figs? I mean I know the idea but is there something you're likely to confuse in the exams?
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