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# OCR PHYSICS B G492~ 9rd June 2014~ AS Physics Watch

1. (Original post by phawkins96)
And inertia, time period, data storage and resolution.

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Oh okay, I just don't see what they could ask about resolution and data storage?

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2. (Original post by liberata)
It's in normal mode I've just checked... maybe I just have a dodgy calculator
Make sure you're using the inverse sin function, not 1/sin. The arcsin button will be the alternative function on the 'sin' button. eg on this calculator ( http://ecx.images-amazon.com/images/...L._SL1500_.jpg ) you'd press 'shift' and then 'sin' to get the arcsin function.
3. (Original post by emfp21)
Oh okay, I just don't see what they could ask about resolution and data storage?

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Well, in the article it compares CROs to digital storage so I guess something about comparisons

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4. (Original post by blackwatersun)
Make sure you're using the inverse sin function, not 1/sin. The arcsin button will be the alternative function on the 'sin' button. eg on this calculator ( http://ecx.images-amazon.com/images/...L._SL1500_.jpg ) you'd press 'shift' and then 'sin' to get the arcsin function.
Yeah I definitely am doing that - thanks anyway but I think I'll just use my dad's calculator haha
5. Can someone please tell me the equations we will need that arent in the equation booklet?!?!
6. Panicking about data and resolution for the first article now as it's always been my weakness!! Please could someone quickly explain it????

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Can someone please tell me the equations we will need that arent in the equation booklet?!?!
S=(u+v)t/2
x=delta*L/d
E=mv^2/2
E=mgh
8. (Original post by emfp21)
Panicking about data and resolution for the first article now as it's always been my weakness!! Please could someone quickly explain it????

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It would depend on the question but I'd imagine resolution would just require estimating the resolution of the oscilloscope which would be something like 0.1 divisions in both axis.
what do you mean by data?
9. (Original post by Carla Huynh)
S=(u+v)t/2
x=delta*L/d
E=mv^2/2
E=mgh
Thanks! What's this one for? x=delta*L/d
10. (Original post by Carla Huynh)
S=(u+v)t/2
x=delta*L/d
E=mv^2/2
E=mgh
Work=fd
Thanks! What's this one for? x=delta*L/d
Rarely comes up but x is fringe separation, L is distance between slits and screen and d is slit separation. Applies to the double slit experiment
12. (Original post by blackwatersun)
Make sure you're using the inverse sin function, not 1/sin. The arcsin button will be the alternative function on the 'sin' button. eg on this calculator ( http://ecx.images-amazon.com/images/...L._SL1500_.jpg ) you'd press 'shift' and then 'sin' to get the arcsin function.
I've definitely done it right - thank you anyway but I think I'll just use my dad's calculator haha
13. (Original post by Carla Huynh)
It would depend on the question but I'd imagine resolution would just require estimating the resolution of the oscilloscope which would be something like 0.1 divisions in both axis.
what do you mean by data?
Right so resolution is half a sub division??

And just other people have been saying about data storage?:/

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14. (Original post by Carla Huynh)
Rarely comes up but x is fringe separation, L is distance between slits and screen and d is slit separation. Applies to the double slit experiment

Oh yeahh! Thanks!
15. (Original post by emfp21)
Right so resolution is half a sub division??

And just other people have been saying about data storage?:/

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Why half a sub division? Lots of people are saying half but I thought it was about 0.1?

oh all of the g941 stuff on bits and that...doubt that'll come up tbh but that's just things like no. of alternatives= 2^number of bits. Although since they didn't both testing much G941 stuff in the G941 exam I guess they could decide that revising for that exam wasn't completely pointless and throw it in
16. (Original post by Carla Huynh)
Why half a sub division? Lots of people are saying half but I thought it was about 0.1?

oh all of the g941 stuff on bits and that...doubt that'll come up tbh but that's just things like no. of alternatives= 2^number of bits. Although since they didn't both testing much G941 stuff in the G941 exam I guess they could decide that revising for that exam wasn't completely pointless and throw it in
Isn't 0.1 of a division and half a sub division the same thing though? Aren't there 5 sub divisions in the division??

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17. Good luck with the exam guys! When you get to A2 it will all seem to be horrendously easy

Just be careful of units, powers, and remember, read the question
And tick the correct number of boxes when prompted!
And for 'show that' questions make sure you state with the curly equals that it is roughly 'x' amount.

These are all basic things that I'm sure you are good at, but people in my year still miss them out D:
18. (Original post by emfp21)
Isn't 0.1 of a division and half a sub division the same thing though? Aren't there 5 sub divisions in the division??

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Oh I see where you got that from. The bold lines are just the lines that are always on oscilloscopes for some unknown reason. It's the small squares that are each a division, so I guess really you're right- the resolution is one of those squares so 1 division.
I was thinking of the uncertainty being 0.1 because that's the thickness of the line!!! Sorry my bad
19. help? my brain has died
Attached Images

20. (Original post by Hicko)
help? my brain has died
Over the 3cm part there are 4x so x=3/4cm

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