OCR PHYSICS B G494~ 11th June 2015 AM ~ A2 Physics

Could we have said that for G the measuring equipment and devices have improved precision


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Maybe, but I think what they were getting at was that the value of density used was way off. Besides, what values would you have improved the precision of?


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Ok for the natural log questions I divided the two values so you cancel the two constants, and re-arranged to get Epsilon, anyone do a similar method to this?

Oh. My. God. I'm such an idiot. I put 9.4x10-7 = 94uA not 0.94uA I wrote 9.4x10-7 above the answer section, do you think I'll only lose one mark then?

Exactly that.

I don't think it can be sound because it was in space so there are no air particle. I put heat

I still don't see what I did wrong then because I got something ^-3. How many marks do you think I would drop?

For the logs question, I did, my answer was 3.86 * 10^-20.

Anyone get this, rather than 3.96? I've checked it again just now, so I'm sure it's right unless I made a silly mistake.

my answer was epsilon = ln10 / [(1/(300*k))-(1/(400*k))] which gives 3.86 * 10^-20

Yep doing it now on my calculator I get the same. Hopefully I just remember my answer wrong!

For the logs question, I did, my answer was 3.86 * 10^-20.

Anyone get this, rather than 3.96? I've checked it again just now, so I'm sure it's right unless I made a silly mistake.

my answer was epsilon = ln10 / [(1/(300*k))-(1/(400*k))] which gives 3.86 * 10^-20

I think it was 2.something
I also think it was less than ln(10) too.
I got (ln(9.something) x k)/(1/300-1/400)



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