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# AQA GCSE Physics Unit 2 and 3 (20th May) watch

1. P3 was the answer motor effect or induction? Because the wire was cutting through the magnets but it said 'effect' ?
2. (Original post by Desouza123)
Did you lot get 12 for half life?
I got 12
3. (Original post by camz01)
P3 was the answer motor effect or induction? Because the wire was cutting through the magnets but it said 'effect' ?
Motor effect
4. (Original post by kwstudent)
PPLS; P2 .... The second last ques - Wot graph did u choose? ABC or D?
B...I think! Or C...I can't remember
5. (Original post by cogito.)
Just want to make it clear that half-life question is 12

It require A-level maths knowledge to solve it which is logarithm rather than just divide, of course you can trial/test to get the answer.
correct, 3 half life therefore 36/3. coreect
6. What direction was the arrow supposed to be on the motor effect question? The current was going from right to left and the magnetic field was north closest to us and south further away. This divided my friendship group but I put down...
7. For the six marker i put
Most of the mass of the atoms is concentrated in the centre
The protons which have positive charge and the neutrons which are neutral are in the nucleus
The protons and neutrons are both heavy and have a mass of one
The electrons have a negative charge and they move around the nucleus
The radius of the nucleus is much smaller than the the radius of the atom
The electrons have no mass
The sum of protons and neutron make the relative mass

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8. What were the six markers?
9. What's the explanation for the 3 mark about the coil moving in p3
10. (Original post by tombirchy)
Neutrons and protons have equal mass.
He is correct for gcse neutrons mass = proton mass. As we talk about relative mass
11. (Original post by Desouza123)
Yeah haha thats what I got too. What did you lot put about the scientists and why they developed a new atom or something
Because the evidence didn't match up, therefore they prediction was required, also the atom didn't have electrons inside as it went throught the gold foil. i think its wrong lol
12. (Original post by Lucofthewoods)
What were the six markers?
To describe the nuclear model of an atom

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13. was repulsion force for fusion needed to overcome?

electrostatic forces?
14. The Question asking you 'the wavelength of an X-ray is the same as the diameter of what' ?

I didn't have a clue, think I put a human cell, hahaha
15. (Original post by emmaalouisee)
B I think? What did you put for the change in focal length for the 60 year old? P3
Was that the graph one on p3? Thought it was for a 90 year old? What length did you use for the focal length for working out the power? Did you convert the units?
was repulsion force for fusion needed to overcome?

electrostatic forces?
I dont even know what repulsion means

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The Question asking you 'the wavelength of an X-ray is the same as the diameter of what' ?

I didn't have a clue, think I put a human cell, hahaha
I think it's an atom, sure that's what the mygcsescience videos said... Could be wrong though
18. (Original post by Hollie1903)
I think it's an atom, sure that's what the mygcsescience videos said... Could be wrong though
You're probably right, but it was only 1 mark so doesn't matter too much
19. (Original post by Hollie1903)
I think it's an atom, sure that's what the mygcsescience videos said... Could be wrong though
Yeah. I'm pretty sure it was
20. The eye question was it suspensory ligaments and retina?

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