OCR GCSE Physics 10th June 2014

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Reply 80

heench

does anyone know what the grade boundaries were last year?

Reply 81

ghlgb

Original post by surya123

Where do you reckon the grade boundary for A* will be? I think around 60%...

That would be pretty awesome :P

Reply 82

Clarinet

Grade Boundaries for Last Year:

http://www.ocr.org.uk/Images/142071-unit-level-raw-mark-grade-boundaries-june-2013.pdf

Page 52

:smile:

Reply 83

ellaKrives

Original post by ohboyimscrewed

Nope correct. LESS demand during night time. LOWER costs, most night time demand is from suppliers and business. They want to pay less money for energy so they can reduce costs.

HIGHER demand during the day. HIGHER costs, consumers primarily use the energy generated in the day which is important as the mechanism is designed to store the majority of energy over night and then release a lot quickly during the day time during high demand.

This whole method reduces costs for the water supplier as well. And that is pretty much the crux of the biscuit.

thanks

what was the answer to that transformer question?

Reply 84

NooNoo1

everyone came out of this exam and said that it was the hardest one yet....i left out the calculation at the end of the paper cos i didn't think you needed to do SUVAT and couldnt find an equation at the front of the booklet :frown:

also the comets question i completely blanked and the 1st 6 marker :/

Reply 85

Rtob1997

Original post by Clarinet

Usually around 45-50

Was the paper out of 80?
and what was a C last year?
do you think it will go down?

Reply 86

Clarinet

Original post by Rtob1997

Was the paper out of 80?
and what was a C last year?
do you think it will go down?

75

C last year was 22/75 in P123 and 25/85 in P456 with 29/48 in coursework

I think it will probably stay around the same

Full grade boundaries here (pg. 52): http://www.ocr.org.uk/Images/142071-unit-level-raw-mark-grade-boundaries-june-2013.pdf

Reply 87

iJAKE

Original post by Qaiys

IT WAS AWFUL YOU GUYS. I hate the stupid physics equations and I kept on getting all the units messed up, like in the kettle one and power stations one, which I got 917J for -___________-

Yep I hated it swell just hope I've not done too badly :smile:

Reply 88

Ellisr

Original post by ghlgb

Velocity, so 15 :smile:

15 x 15
---------
2g

I thought the kinetic energy was 15 but I don't know so confused now what did people get for the power station one

Reply 89

iJAKE

For the last few years the grade boundaries have been 46/75 for an A*

Reply 90

white_o

Original post by ellaKrives

thanks

what was the answer to that transformer question?

I said they're step up transformers which increase voltage and therefor lower current to reduce energy loss

Reply 91

SCIENCE :D

Original post by Qaiys

I said they're step up transformers which increase voltage and therefor lower current to reduce energy loss

I put this too yaya! :smile:

Reply 92

robzwolf

h=\frac{v^2}{2g}

Correct?

Reply 93

white_o

Original post by SCIENCE :D

I put this too yaya! :smile:

The rush of relief when someone else has the same answer hahah :P

Original post by robzwolf

h=\frac{v^2}{2g}

Correct?

That's what I used and what most people seemed to use.

Reply 94

Ellisr

Original post by Qaiys

The rush of relief when someone else has the same answer hahah :P

That's what I used and what most people seemed to use.

But we weren't given the velocity just the kinetic energy and they aren't the same no ?

Reply 95

white_o

Original post by Ellisr

But we weren't given the velocity just the kinetic energy and they aren't the same no ?

We were given 15m/s, I used that as velocity.

Reply 96

elliot785

for the height question i got 22.5m, which is twice most peoples answer, i was very confused as what to do, so i guessed really, I assumed acceleration was uniformal and i thought the fall lasted 3 seconds as 0.5kg * 10N/kg * time = 15 and so time must be 3, and then i used the equation s= (u+v/2)*t which was s= (0 + 15/2)* 3 which is 22.5m, would i get any marks for that ?

Reply 97

tomm_r

Yeaaah i got 75m so im screwed -_-

Reply 98

white_o

Original post by elliot785

I really have no idea, was it two or three marks? You'd probably get one I guess, really don't know, not that many marks anyway so not a big deal :P

Original post by tomm_r

Yeaaah i got 75m so im screwed -_-

Hahaa, you might have got some marks for working? :P

Reply 99

tomm_r

Original post by Qaiys

I really have no idea, was it two or three marks? You'd probably get one I guess, really don't know, not that many marks anyway so not a big deal :P

Hahaa, you might have got some marks for working? :P