Physics P1 - 3 OCR Gateway B GCSE Official Discussion Thread

I got all the same apart from kWh question but thats probably my error :smile:

I got something like 14p! Oh an I got 560,000J, again probably my error

i got that too! i was the only one so thinking it was pretty wrong
i did speed x time for distance then force x distance

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Reply 21

ellamoon_22

3

The double glazing is exactly the same as the january 2012 six mark. :biggrin:

Basically there is two methods of the transfer conduction and convection

The warm air particles are moving fast more kinetic energy. The bump into glass particles so transfer this kinetic energy so glass gains it and starts to move fast. The cold air bumps into glas gains the energy and bounces off more quickly

Reply 22

ellamoon_22

3

Original post by HouseOfRichman

I got all the same apart from kWh question but thats probably my error :smile:

I got something like 14p! Oh an I got 560,000J, again probably my error

Opps i got 54000 p or something how many marks was it

Reply 23

esmithxx

13

Original post by mxskaan

Posted on another thread too but for calculations I got:

1800J for wasted energy
60% efficiency

60 degrees for water and 40 degrees for plastic beaker

7.83A for the highest current (oven)

2m/s^2 for acceleration
280,000J for workdone and 56,000 watts for power

540p for the kwh question

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Omg I got the exact same apart from 13.75p for the cost but thats probs wrong😂

Reply 24

Tea2345

13

I thought the exam was good (way better than some of the past papers!!) but some of the questions were just annoying like the first page and the bit about Anita and global warming like whyyyy😂

Reply 25

Gymnast7

9

Original post by HouseOfRichman

What are the predictions for grade boundaries?

I'd guess around 55/56 for an A* because it was a fairly easy paper.

Reply 26

username1863871

13

Original post by Gymnast7

I'd guess around 55/56 for an A* because it was a fairly easy paper.

Thank god, you don't know how happy that makes me because I thought it would be like 61 like the chemistry paper last year

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Reply 27

username1863871

13

Original post by esmithxx

Omg I got the exact same apart from 13.75p for the cost but thats probs wrong😂

I also got this but rounded it to 14p!!

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Reply 28

esmithxx

13

[QUOTE=HouseOfRichman;65808185]I also got this but rounded it to 14p!!

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Oh yeah forgot you can't have have 3/4 of a penny😂

Reply 29

Zoroarrkk

1

The first 6 marker can do die, the other two I found somewhat easy as it was just stating a table/graph with some knowledge or use of equations. What did you guys put for the first 4 1 markers on Ozone? It threw me off completely.

Reply 30

-AN-

8

Original post by JoeR12345

I got 140,000J for the work done as I worked out the distance was 1/2 x 10 x 10 so 50. Then multiplied that by the force (2800) to get 140,000J? I may be wrong idk

It was 1/2*10*20 = 100 mate because the base was 10 and height was 20.

Reply 31

Its_Echo

3

Original post by mxskaan

Posted on another thread too but for calculations I got:

1800J for wasted energy
60% efficiency

60 degrees for water and 40 degrees for plastic beaker

7.83A for the highest current (oven)

2m/s^2 for acceleration
280,000J for workdone and 56,000 watts for power

540p for the kwh question

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What did you do to get 56000 watts, I got 28000

Reply 32

-AN-

8

Original post by ellamoon_22

The double glazing is exactly the same as the january 2012 six mark. :biggrin:

Basically there is two methods of the transfer conduction and convection

The warm air particles are moving fast more kinetic energy. The bump into glass particles so transfer this kinetic energy so glass gains it and starts to move fast. The cold air bumps into glas gains the energy and bounces off more quickly

I think you had to say that the air gap stopped conduction so the window on the outside wouldn't be hot so wouldn't transfer its heat energy to the cold particles, keeping the inside warm.

Reply 33

-AN-

8

Original post by Its_Echo

What did you do to get 56000 watts, I got 28000

2800*20

Reply 34

username1863871

13

Original post by esmithxx

Oh yeah forgot you can't have have 3/4 of a penny😂

Sorry I didn't mean that in 'you're silly' way but in a yay someone else got the same answer way 😅 you'll probably still get the mark because it's the right answer and they didn't ask you to round

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Reply 35

U-GradeStudent

12

Anyone going to do a unofficial mark scheme?

Reply 36

Its_Echo

3

Original post by Arian Nazifi

2800*20

Aaaah I divided 280000 by 10 because the van did 280,000J of work

and power = work / time, 280,000/10 = 28,000

Really disappointed I didn't get that

Reply 37

AA11AAA

Is there a unofficial markscheme for this paper?

Reply 38

AA11AAA

What was the other thread you posted it on?

Original post by esmithxx

Omg I got the exact same apart from 13.75p for the cost but thats probs wrong😂

Reply 39

R2-D2

9

Original post by moppp

I got 1080p for the cost of keeping it on for 20 hours... what did I do wrong?

Hey I also got this too! I dont know if u did this but I saw that it produced 1500J (1.5kW) in 0.5 hours so to get 1 hour, I doubled it by 2 to get 3000W (3kW)!
I then did 3 times 20 to get 60 and then 60 times 18 to get 1080p.... :/

Im not sure though, I've been hearing different answers so I'm quite worried!

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