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OCR A AS Physics 2019 depth (17th May) Unofficial Markscheme

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Original post by Ryan0887
did you get the absolute uncertainty as 0.03?


No it's half the range
how was the 6 marker
But each measurement had an uncertainty of 0.01cm so you just ass them all up.
Original post by thekidwhogames
No it's half the range
Original post by iamcambridge
how was the 6 marker


Which one
both of them
Original post by iamcambridge
both of them


Change f
Measure a and d
Use mic to find X of 10 and divide by 10
Plot 1.over f against x
Gradient x a over D is v
Safety ear protectors in case f too high or low
Other one was defining all the terms I think 3 marks then competing all of them
and v is what
Original post by iamcambridge
and v is what

Speed of sound
mate you are not making
any sense
Original post by iamcambridge
mate you are not making
any sense


What? It said to determine V the speed of sound
Vary f and measure x

Plot x against 1/f

Grsfient is xf

From equation u know gradient x a / D = V
oh i thought ax/d is wavelength
Original post by iamcambridge
oh i thought ax/d is wavelength

Which is V/f and the experiment was how f affects x
oh thanx
For the second 6 marker, I said plot a/D multiply the gradient by x and then by the frequency used. I also said repeat with different frequencies,
and how did you do the calculations
Original post by iamcambridge
and how did you do the calculations


Which ones
Original post by Ryan0887
For the second 6 marker, I said plot a/D multiply the gradient by x and then by the frequency used. I also said repeat with different frequencies,


I think u are changing f and u wanna see how it affects x so these should be axis

1/f and x
the area of the stool and and k and the distance
There's probably a few ways of doing it as it's not an actual required practical it's kind of merged.
Original post by thekidwhogames
I think u are changing f and u wanna see how it affects x so these should be axis

1/f and x

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