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

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Yeah the question specifically said "subject to the conditions stated above", which implies there's only one velocity - the one given, so I think they'll reject the "different velocities" answer.

That is good because I didn't write that :wink:

Reply 261

allstar1996

What are the UMS boundaries normally like / predictions for this paper?

Reply 262

STATER

Original post by Knowing

Yeah the question specifically said "subject to the conditions stated above", which implies there's only one velocity - the one given, so I think they'll reject the "different velocities" answer.

Are you sure that it was the velocity and not the speed that was constant?

Reply 263

emfp21

So annoyed, for the 3 marker I drew the wave but forgot to label it :frown:

Will I get no marks?

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Reply 264

allstar1996

Ah cheers mate. It was a pretty decent paper i thought - much better than G491 haha

Reply 265

STATER

Original post by emfp21

So annoyed, for the 3 marker I drew the wave but forgot to label it :frown:

Will I get no marks?

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I've done a question like that before. You'll only lose one mark if the wave was drawn correctly.

Reply 266

emfp21

Did anyone have any idea about the resolution question in section c?:L

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Reply 267

Knowing

Original post by STATER

Are you sure that it was the velocity and not the speed that was constant?

At the top it said "water passed through the turbine at a speed of 12ms^-1". Velocities shouldn't really come into it (water currents flow in one direction - there won't be any going to opposite way to counteract it)

Reply 268

Bean man

Peugeot ion travelling at 80km /h for 120 km power question, what did you guys get?

Reply 269

Mutleybm1996

Original post by emfp21

Did anyone have any idea about the resolution question in section c?:L

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0.02 i think

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Reply 270

Mutleybm1996

Original post by Bean man

Peugeot ion travelling at 80km /h for 120 km power question, what did you guys get?

24?

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Reply 271

emfp21

Original post by Bean man

Peugeot ion travelling at 80km /h for 120 km power question, what did you guys get?

27kW

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Reply 272

DomStaff

Original post by allstar1996

What are the UMS boundaries normally like / predictions for this paper?

70-76 for an A I think, recently, it has been about 60 before but that won't happen again. I predict 90/100 is 100% UMS

Reply 273

DomStaff

Original post by emfp21

27kW

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24kW

120 km / (80 km h^-1) = 1.5 hours.

1.5 * 16 = 24

This is providing I can remember the numbers correctly.

Reply 274

STATER

What was the answer for the 1 marker about the maximum wavelength that can create 3 fringes. Something like 630nm?

Reply 275

DomStaff

Original post by STATER

What was the answer for the 1 marker about the maximum wavelength that can create 3 fringes. Something like 630nm?

Yep. You assume order 3 is at 90 degrees, as this is the maximum size of order 3 hence maximum wavelength.

Reply 276

Bean man

Original post by DomStaff

24kW

120 km / (80 km h^-1) = 1.5 hours.

1.5 * 16 = 24

This is providing I can remember the numbers correctly.

Isn't that just the capacity of the battery though in kWh?

Reply 277

DomStaff

Original post by Bean man

Isn't that just the capacity of the battery though in kWh?

I can't remember, why what did you multiply 1.5 by?

Reply 278

Bean man

Original post by DomStaff

I can't remember, why what did you multiply 1.5 by?

I don't know to be honest, I can't remember either but I put 24 down and also something like 10.6kw, don't know why haha

Reply 279

DomStaff

Original post by Bean man

I don't know to be honest, I can't remember either but I put 24 down and also something like 10.6kw, don't know why haha

That question has gone completely blank in my mind after the 1.5 mark, I can't even remember what the question said. I think you're right though, I may have lost 2 marks.