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Physics P2 Unofficial Markscheme Edexcel.

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What did you get for the mass 7 days before, I got 330 something, I cant remember exactly

I can't remember exactly what I got, but the half-life after 7 days changed by a mass of 99, so I added 99 to the original mass as it was 7 days before. :biggrin:

Reply 41

grace143

Original post by UnknownStudent1

Do you think the whole paper will be released like the Maths exams? Or is it just going to be in text format? I would prefer the whole paper being released 😒

no one has access to the whole paper.

Reply 42

harry_16

What was the answer to 2(a) about the difference between fission and fusion?

Reply 43

L0st45

Oh for question 5 (can't remember which part of the question)

12 V = 12 joules per Coulomb.

Reply 44

Rof74

Original post by UnknownStudent1

I think it is 330. It would around that value

How did you get that because I got 260

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Reply 45

harry_16

For the first 6 mark question, I wrote that when a filament lamp is switched on the potential difference begins to increase causing the current to rise as shown in the graph. However, as this happens, the resistor starts to heat up due to the electrons colliding with ions meaning that the resistance increases. This is why the current is shown to stop increasing at 0.5A in the graph.

Reply 46

keepyourapology

Original post by Rof74

How did you get that because I got 260

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How did you get 260 because I got 315.

Reply 47

qutae

Original post by UnknownStudent1

Doesn't that seem too complex for only 2 marks?

I thought it was too complex too. I did GPE to get 171mill joules because energy transferred = work done :smile:

Reply 48

TheMasterofLife

Original post by UnknownStudent1

I think it was 1,710,000 as in the question it told us that earths gravitational field strength is 10 N/kg and there is no other equation that requires gravitational field strength other than the 'weight = mass x gravitational field strength' equation. Unless they were trying to play us, which I highly doubt, I think that's the correct answer. I got that too, so am hoping for the best ☺️

It was 2,375,000, because, it was calculating the work done, which is Force times Distance travelled. The 10N/Kg was given to work out the Force of the cart (9500kg * 10N/kg), and then multiply it by 25 for 2,375,000 J

Reply 49

TSRPAV

Original post by UnknownStudent1

Do you think the whole paper will be released like the Maths exams? Or is it just going to be in text format? I would prefer the whole paper being released 😒

show me the paper and i can fill it in

Reply 50

TheMasterofLife

Original post by harry_16

I said that the increase in voltage, causes more energy to be transferred per coloumb of charge, hence for each electron. So the energy in the electrons are raised, meaning more collisions occur between the cations in the lattice, increasing the resistance of the wire. This causes the graph to level off, as the resistance increases and the voltage increases the temperature of the wire, meaning that the current levels off.

Reply 51

Rof74

Original post by TheMasterofLife

Yeah, 1,710,000 is the answer for the second part , about Kinetic energy not work done question

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Reply 52

L0st45

For the velocity-time graph in Q6, did anyone get 18 as their answer? I did the area of a triangle for her accelerating velocity thing (can't remember the full question).

Reply 53

grace143

Original post by keepyourapology

How did that exam go? Starting an unofficial mark scheme..xD Please add questions as well. :smile:

Spoiler

You said the answer to 5b was "joules per coulomb" but you mean "12 joules per coulomb" :smile:

Reply 54

TheMasterofLife

Original post by Rof74

Yeah, 1,710,000 is the answer for the second part , about Kinetic energy not work done question

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Isn't the kinetic energy transferred the same as the work done, assuming there is a perfect transfer. Plus it was only 1 mark?

Reply 55

username1973239

Original post by L0st45

For the velocity-time graph in Q6, did anyone get 18 as their answer? I did the area of a triangle for her accelerating velocity thing (can't remember the full question).

Acceleration is the gradient not the area

Reply 56

Rof74

Original post by keepyourapology

How did you get 260 because I got 315.

I checked how much activity after 7 days which was 100 so I did 180-100 which is 80, then did 180 +80 which is 260

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Reply 57

student2607

Original post by L0st45

For the velocity-time graph in Q6, did anyone get 18 as their answer? I did the area of a triangle for her accelerating velocity thing (can't remember the full question).

I got 6. something, I don't think we had to work out the distance travelled by doing the area, it was just the gradient as it was for acceleration.

Reply 58

qutae

For the six marker about the filament lamp, I said:
- as the potential difference increases, so does the current as long as the temperature is constant so they are proportional.
- however this is only up to 0.3A where the graph starts to level off
- because the individual increased the resistance, the temperature increased too
- this is due to the electrons in the current colliding with ions in the lattice to convert kE into heat energy.
- therefore current decreases (so it levels off)
- the current stays at 0.5A because the voltage is still increasing to keep the current at the same value :-)