Edexcel A level Physics Advanced Physics I 15 june 2017 new spec

Do you think you would get away without mentioning the fact that equation 4 is wrong because it doesn't say we need to know about strangeness in the specification-
"understand how to use laws of conservation of charge, baryon number and lepton number to determine whether a particle interaction is possible" ?

I thought only kaons have strangeness. Book 2 page 115 definition 3

Yeah youre right i edited it, im just confused as to where the other marks are in the question

I think I got it wrong if it isn't conserved in weak interactions though. Luckily I also talked about Baryon number and charge
(might scrape together a few marks out of the 6)

apparently strangeness isnt conserved in any of them so youre fine and doesnt need to be conserved in weak interactions

For the trolley rolling down the slope I read off the potential difference (0.64V) divided this by 1.5V then multiplied by 2m to find the length of the wire the data logger was connected in with then used s=(u+v)/2 x t to find the final velocity- is this right?

What did you get? seems right
think i went the long way and used two other values to find acceleration then plugged back in to find velcoity

About 1.14ms-1

i got 1.18 i reckon theyll have a little range on that question, maybe

You had to use pythagoras with gravity and acceleration to work out an angle.

What did you guys put for Q8? I just guessed..

H i got as 2.29 - Yes
R the distance was 22.49 - Yes
derivaton p=w/t w=fd d=2pir t=2pi/ omega, 2pis cancel - Something similar... didn't use 2pi. Just used formula to get mgr*w
small pond used, only one less than 0.04N - Yes
Elecric field lines form posititve to negative, equipotential perpendicular to those, identical to one on page 40 of book 2 - Yes
Angle i got like 4.2 something, not in range of uncertainty - Yes, but it is in range... It was 1 degree, not percent, so between 3-5 degrees
speed i got 1.18 from voltage graph ( think i did wrong) - Yes, (8/7 m/s)
Bike one- pushes on pedals,applies force, unbalanced force, acceleration,drag increases,accelleartion decreases, constant velocity as forces balance - Yes
criticised by saying not 100% effficient, energy losses, work done to provide centripetal force on wheels, to make circular motion occur (Waffled) - Talked about work done against air resistance and friction and efficiency
6 marker in synchotron- magnetic field, right angles, force provided acts as centripetal ,electric field, accelerates between Dees, speeding up and causes ke to increase - Yes
Neutral baryon give couldnt be used as only charged particles seen in bubble chamber but looking at radius, curvature, direction and using princilple of conservation of momentum and FLHR we can deduce charge, speed etc. - Sort of... neutral particles don't ionise, whereas charged do
High enegery porotns, mass energy equivalnce, energy converted to mass, e=delta m c squared - Yes
more approprtaite than X ray as speciifcally target tumour, less ionising to nearby healthy cells
economically better, lower energy costs, better for patients, less ionising radiation damage - Yes, and more efficient


do these sound right

Sorry for doing it in the quote

Pretty sure that an antilepton has lepton number -1. So the electron-positron pair is possible, like with photon pair decay.

H i got as 2.29
R the distance was 22.49
derivaton p=w/t w=fd d=2pir t=2pi/ omega, 2pis cancel
small pond used, only one less than 0.04N
Elecric field lines form posititve to negative, equipotential perpendicular to those, identical to one on page 40 of book 2
Angle i got like 4.2 something, not in range of uncertainty
speed i got 1.18 from voltage graph ( think i did wrong)
Bike one- pushes on pedals,applies force, unbalanced force, acceleration,drag increases,accelleartion decreases, constant velocity as forces balance
criticised by saying not 100% effficient, energy losses, work done to provide centripetal force on wheels, to make circular motion occur (Waffled)
6 marker in synchotron- magnetic field, right angles, force provided acts as centripetal ,electric field, accelerates between Dees, speeding up and causes ke to increase
Neutral baryon give couldnt be used as only charged particles seen in bubble chamber but looking at radius, curvature, direction and using princilple of conservation of momentum and FLHR we can deduce charge, speed etc.
High enegery porotns, mass energy equivalnce, energy converted to mass, e=delta m c squared
more approprtaite than X ray as speciifcally target tumour, less ionising to nearby healthy cells
economically better, lower energy costs, better for patients, less ionising radiation damage


do these sound right

Thank you, more confident now, dont even need physics as its not in my offer but happy to have done well