Edexcel Physics Unit 2 "Physics at work" June 2013

Year 12s: what will be the first way you research your future options? >>

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Reply 860

jollygood

Original post by Alexsk

I wrote that 3 is C. Is that wrong?

i wrote C as well. Can u ask ur dad about this MCQ?

Reply 861

ambbs

Original post by jollygood

i wrote C as well. Can u ask ur dad about this MCQ?

Personally I am convinced it is C. Posted this earlier which shows a very similar thing from the textbook, if you look at the pictures.

Original post by ambbs

I put C too. I think we're right, because I remembered seeing this in the textbook ImageUploadedByStudent Room1370514521.634454.jpg

ImageUploadedByStudent Room1370514527.631827.jpg

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Reply 862

RoyalBlue7

Original post by ambbs

Personally I am convinced it is C. Posted this earlier which shows a very similar thing from the textbook, if you look at the pictures.

Yes its C. Convinced than ever now. Thanks

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Reply 863

JoshThomas

Mgh/vit or 0.5mv2/vit

Reply 864

KingSullers

Original post by vinhvu95

Did anyone see through the trick question in question 17? It wasn't a negative gradient graph, because that's when the voltmeter is measuring the load resistance, but in this question the voltmeter was measuring the Pd at the battery, so it would've been a positive graph

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I got confused by that question, as you said, the question was asking about the p.d. across the cell hence I drew a positive gradient graph, but I have no idea if its right :frown:

Reply 865

TheGoldenRatio

any one want to guess GRADE BOUNDARIES!!!!!!!!!!!!

Reply 866

flou_fboco

Mgh/vit or 0.5mv2/vit

does that mean that the q has two answers since mgh= 0.5mv2

Reply 867

B-Stacks

Original post by TheGoldenRatio

any one want to guess GRADE BOUNDARIES!!!!!!!!!!!!

anyone??

Roughly grade boundaries for each grade?

Reply 870

TheGoldenRatio

agreed as 54 for an A

Reply 871

frannyw

What are the grade boundaries likely to be for C/D?

Reply 872

B-Stacks

Original post by frannyw

What are the grade boundaries likely to be for C/D?

Count your way every 5 marks down from whatever you think will be for an A.

Reply 873

Alexsk

Please someone answer the Doppler Effect because I do not remember the alternatives...

Reply 874

Freddy-Francis

Original post by Alexsk

Please someone answer the Doppler Effect because I do not remember the alternatives...

Doppler effect? Which is that? :holmes:

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Reply 875

x0x

Original post by TheGoldenRatio

agreed as 54 for an A

i really want the A boundary to be that low but tbh i don't think it will be lower than 58 for an A
that is just my opinion :P feel free to disagree

Reply 876

x0x

Original post by Freddy-Francis

Doppler effect? Which is that? :holmes:

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The one about S and O (one is a source the other is an observer)
i think the answer is C .. both move towards each other so frequency increases?

Reply 877

Freddy-Francis

Original post by x0x

The one about S and O (one is a source the other is an observer)
i think the answer is C .. both move towards each other so frequency increases?

i cant remember. I put C or D i think

Reply 878

GCSE-help

Original post by x0x

Trace Y and move it backwards a quarter of a cycle
You will find that it goes over X
So it is half a radian ahead of it
so i think its D
nevertheless you may be right :P

I put D but unfortunately I've realized it must be C :frown:

The question doesn't tell us which way the wave is moving, it is a displacement TIME graph. We can't use the 'tracing' method, so yeah we were tricked :redface:

The only possible option is C

Reply 879

Freddy-Francis

Original post by GCSE-help

I put D but unfortunately I've realized it must be C :frown:

The question doesn't tell us which way the wave is moving, it is a displacement TIME graph. We can't use the 'tracing' method, so yeah we were tricked :redface:

The only possible option is C