# Urgent: *AQA PHYSICS PROOFS A LEVEL*

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#1
Which proofs do we need to know?
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2 years ago
#2
We need to be able to manipulate equations given to us to produce another equation.. annnddd,

we need to be able to prove the kinetic theory model and Ek
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2 years ago
#3
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#4
(Original post by BDunlop)
We need to be able to manipulate equations given to us to produce another equation.. annnddd,

we need to be able to prove the kinetic theory model and Ek
honestly, thanks soo much for responding! So I know the kinetic theory model, but what do you mean by ek? Are there any kinetic thoery proof past papers btw? Secondly, don't we need to know newton's law of gravitation proof, or SHM time period proofs?
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#5
i checked and there's no mention of proofs. Could you help? http://filestore.aqa.org.uk/resource...08-SP-2015.PDF
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2 years ago
#6
(Original post by yoyomynameis...)
honestly, thanks soo much for responding! So I know the kinetic theory model, but what do you mean by ek? Are there any kinetic thoery proof past papers btw? Secondly, don't we need to know newton's law of gravitation proof, or SHM time period proofs?

We don't need to be as to prove Newton's law of gravitation, but we need to be able to manipulate it with centripetal force, and to be able to manipulate the SHM equations to prove that time period is independent of velocity etc
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2 years ago
#7
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#8
(Original post by BDunlop)
Thank you very very much It doesn't mention the eK proof does it? And i checked the spec using derivations as the key words and found 6. You think thats about right?
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2 years ago
#9
(Original post by yoyomynameis...)
Thank you very very much It doesn't mention the eK proof does it? And i checked the spec using derivations as the key words and found 6. You think thats about right?
It says at the bottom you need to understand how average Ek for a molecule is calculated.. I've done questions asking about it
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2 years ago
#10
you may also have to derive kepler's 3rd law. t^2 is proportional to r^3.
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2 years ago
#11
(Original post by yoyomynameis...)
Which proofs do we need to know?
Just the kinetic theory of gases and the diffraction grating equation
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#12
(Original post by Harj2807)
you may also have to derive kepler's 3rd law. t^2 is proportional to r^3.
do you have any idea on how to do that? Using F=mv^2/R and the graviational force?
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#13
(Original post by BDunlop)
It says at the bottom you need to understand how average Ek for a molecule is calculated.. I've done questions asking about it
awesome cheers

(Original post by G.Y)
Just the kinetic theory of gases and the diffraction grating equation
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#14
(Original post by G.Y)
Just the kinetic theory of gases and the diffraction grating equation
Is diffraction grating just using the path difference? And similar triangles? Have you ever seen a question on it?
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2 years ago
#15
(Original post by G.Y)
Just the kinetic theory of gases and the diffraction grating equation
Do we need to know how to form nsin(theta) =n lamda, pretty sure we don't?
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2 years ago
#16
(Original post by BDunlop)
Do we need to know how to form nsin(theta) =n lamda, pretty sure we don't?
Edit: I've just checked, you're right
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2 years ago
#17
(Original post by yoyomynameis...)
Is diffraction grating just using the path difference? And similar triangles? Have you ever seen a question on it?
Yes but no I’ve never seen a question on it
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2 years ago
#18
(Original post by yoyomynameis...)
do you have any idea on how to do that? Using F=mv^2/R and the graviational force?
yeah, just equate them and it should work out.
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2 years ago
#19
PM me with your email and I'll send you a resource with all the required proofs.
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#20
(Original post by G.Y)
Yes but no I’ve never seen a question on it
i saw one question on it, problem is i lost my mock which featured the q
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