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

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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Reply 181

blackwatersun

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/I/71tFoa7v5EL._SL1500_.jpg ) you'd press 'shift' and then 'sin' to get the arcsin function.

Reply 182

phawkins96

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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Reply 183

liberata

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/I/71tFoa7v5EL._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

Reply 184

adamcrompton

Can someone please tell me the equations we will need that arent in the equation booklet?!?!

Reply 185

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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Reply 186

Original post by adamcrompton

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

Reply 187

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?

Reply 188

adamcrompton

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

Reply 189

Original post by Carla Huynh

S=(u+v)t/2
x=delta*L/d
E=mv^2/2
E=mgh

Work=fd

Reply 190

Original post by adamcrompton

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 :smile:

Reply 191

liberata

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/I/71tFoa7v5EL._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

Reply 192

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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Reply 193

adamcrompton

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 :smile:

Oh yeahh! Thanks!

Reply 194

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 :wink:

Reply 195

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 :wink:

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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Reply 196

kastiel

6

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

Just be careful of units, powers, and remember, read the question :wink:

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:

Reply 197