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HELP PHYSICS alpha scattering
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MrToodles4
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#1
http://pmt.physicsandmathstutor.com/...s%201%20QP.pdf
Can someone help me with question 2biv? the markscheme just says 'correct explanation' - would like to know what this correct explanation is thank you
MS:http://pmt.physicsandmathstutor.com/...s%201%20MS.pdf
Can someone help me with question 2biv? the markscheme just says 'correct explanation' - would like to know what this correct explanation is thank you
MS:http://pmt.physicsandmathstutor.com/...s%201%20MS.pdf
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Callicious
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#2
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#2
If the alpha particle travels 'much closer' to the nucleus such as to be affected by the strong nuclear force, it'll be attracted into the nucleus and fusion will occur, or at least the alpha particle will be captured by the nucleus, provided it has enough energy for this to occur. That's the only explanation I can muster for the strong force being involved. You'd need to overcome a lot of electrostatic repulsion for this, though.
Yall need at least a distance of 3-4 fm for it to get the strong force going for that, though.
Yall need at least a distance of 3-4 fm for it to get the strong force going for that, though.
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Shaanv
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#3
(Original post by MrToodles4)
http://pmt.physicsandmathstutor.com/...s%201%20QP.pdf
Can someone help me with question 2biv? the markscheme just says 'correct explanation' - would like to know what this correct explanation is thank you
MS:http://pmt.physicsandmathstutor.com/...s%201%20MS.pdf
http://pmt.physicsandmathstutor.com/...s%201%20QP.pdf
Can someone help me with question 2biv? the markscheme just says 'correct explanation' - would like to know what this correct explanation is thank you
MS:http://pmt.physicsandmathstutor.com/...s%201%20MS.pdf
I would assume that if the alpha particle travels closer than the value calculated in iii, then strong force acts on the alpha particle.
I think they want u to say that the magnitude of the resultant force decreases, then u could say that the resultant force becomes attractive or stays repulsive i think u will get the marks either way.
This is likely because the strength of the strong nuclear force is probz not on ur spec so they wouldnt expect u to know exactly what is going to happen, but they would expect u to have an idea of what would happen and both of the ideas i mentioned above seem plausible to me.
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MrToodles4
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#4
(Original post by Callicious)
If the alpha particle travels 'much closer' to the nucleus such as to be affected by the strong nuclear force, it'll be attracted into the nucleus and fusion will occur, or at least the alpha particle will be captured by the nucleus, provided it has enough energy for this to occur. That's the only explanation I can muster for the strong force being involved. You'd need to overcome a lot of electrostatic repulsion for this, though.
Yall need at least a distance of 3-4 fm for it to get the strong force going for that, though.
If the alpha particle travels 'much closer' to the nucleus such as to be affected by the strong nuclear force, it'll be attracted into the nucleus and fusion will occur, or at least the alpha particle will be captured by the nucleus, provided it has enough energy for this to occur. That's the only explanation I can muster for the strong force being involved. You'd need to overcome a lot of electrostatic repulsion for this, though.
Yall need at least a distance of 3-4 fm for it to get the strong force going for that, though.
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Callicious
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#5
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#5
(Original post by MrToodles4)
Yeah that makes sense but what would you say about the resultant force then? As the question asks how the strong nuclear force affects the resultant force...
Yeah that makes sense but what would you say about the resultant force then? As the question asks how the strong nuclear force affects the resultant force...
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MrToodles4
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#6
(Original post by Shaanv)
Range of strong nuclear force is 3-4fm.
I would assume that if the alpha particle travels closer than the value calculated in iii, then strong force acts on the alpha particle.
I think they want u to say that the magnitude of the resultant force decreases, then u could say that the resultant force becomes attractive or stays repulsive i think u will get the marks either way.
This is likely because the strength of the strong nuclear force is probz not on ur spec so they wouldnt expect u to know exactly what is going to happen, but they would expect u to have an idea of what would happen and both of the ideas i mentioned above seem plausible to me.
Range of strong nuclear force is 3-4fm.
I would assume that if the alpha particle travels closer than the value calculated in iii, then strong force acts on the alpha particle.
I think they want u to say that the magnitude of the resultant force decreases, then u could say that the resultant force becomes attractive or stays repulsive i think u will get the marks either way.
This is likely because the strength of the strong nuclear force is probz not on ur spec so they wouldnt expect u to know exactly what is going to happen, but they would expect u to have an idea of what would happen and both of the ideas i mentioned above seem plausible to me.
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Shaanv
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#7
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#7
(Original post by MrToodles4)
It makes sense up to resultant force becomes attractive or stats repulsive - how can it be both?
It makes sense up to resultant force becomes attractive or stats repulsive - how can it be both?
If it were two protons or two helium nuclei then i would probably say the resultant force is attractive to allow fusion but the magnitude of the product of the charges of aluminium and and alpha particle is higher than between two protons, so the electrostatic repulsion would be greater.
So we know that the strong nuclear force will act on alpha particle but u don’t know if it is great enough to cause a net attractive force, so i think u could say any and as long as u don’t contradict urself.
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Anonymouspsych
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#8
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#8
(Original post by MrToodles4)
http://pmt.physicsandmathstutor.com/...s%201%20QP.pdf
Can someone help me with question 2biv? the markscheme just says 'correct explanation' - would like to know what this correct explanation is thank you
MS:http://pmt.physicsandmathstutor.com/...s%201%20MS.pdf
http://pmt.physicsandmathstutor.com/...s%201%20QP.pdf
Can someone help me with question 2biv? the markscheme just says 'correct explanation' - would like to know what this correct explanation is thank you
MS:http://pmt.physicsandmathstutor.com/...s%201%20MS.pdf
If we take the strong nuclear force into account, this is an attractive force between nucleons in the range of 0.5-3 fm. So in addition to the electrostatic repulsive force on the alpha particle on the left direction, there is also an attractive force on the right direction. So this means the overall resultant force acting leftwards will be smaller.
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MrToodles4
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#9
(Original post by Anonymouspsych)
So there is obviously a repulsive electromagnetic force that is acting on the alpha particle as it approaches the nucleus as both the alpha particle and aluminium nucleus are positive charged. So excluding the strong nuclear force, there is going to only be one force acting on the left (ignoring any other trivial forces like weight which is negligible) which is that repulsive force and this would be the resultant force.
If we take the strong nuclear force into account, this is an attractive force between nucleons in the range of 0.5-3 fm. So in addition to the electrostatic repulsive force on the alpha particle on the left direction, there is also an attractive force on the right direction. So this means the overall resultant force acting leftwards will be smaller.
So there is obviously a repulsive electromagnetic force that is acting on the alpha particle as it approaches the nucleus as both the alpha particle and aluminium nucleus are positive charged. So excluding the strong nuclear force, there is going to only be one force acting on the left (ignoring any other trivial forces like weight which is negligible) which is that repulsive force and this would be the resultant force.
If we take the strong nuclear force into account, this is an attractive force between nucleons in the range of 0.5-3 fm. So in addition to the electrostatic repulsive force on the alpha particle on the left direction, there is also an attractive force on the right direction. So this means the overall resultant force acting leftwards will be smaller.
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MrToodles4
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#10
(Original post by Shaanv)
Well u dont know whats stronger, is the electrostatic repulsion stronger than the strong nuclear or vice versa. If repulsion is stronger the resultant will still be repulsive and vice versa.
If it were two protons or two helium nuclei then i would probably say the resultant force is attractive to allow fusion but the magnitude of the product of the charges of aluminium and and alpha particle is higher than between two protons, so the electrostatic repulsion would be greater.
So we know that the strong nuclear force will act on alpha particle but u don’t know if it is great enough to cause a net attractive force, so i think u could say any and as long as u don’t contradict urself.
Well u dont know whats stronger, is the electrostatic repulsion stronger than the strong nuclear or vice versa. If repulsion is stronger the resultant will still be repulsive and vice versa.
If it were two protons or two helium nuclei then i would probably say the resultant force is attractive to allow fusion but the magnitude of the product of the charges of aluminium and and alpha particle is higher than between two protons, so the electrostatic repulsion would be greater.
So we know that the strong nuclear force will act on alpha particle but u don’t know if it is great enough to cause a net attractive force, so i think u could say any and as long as u don’t contradict urself.
Could you also help me with 4b? here: http://pmt.physicsandmathstutor.com/...s%202%20QP.pdf
its quick Im just not sure what the markscheme is saying again.
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Shaanv
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#11
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#11
(Original post by MrToodles4)
I guess that makes sense. Thank you.
Could you also help me with 4b? here: http://pmt.physicsandmathstutor.com/...s%202%20QP.pdf
its quick Im just not sure what the markscheme is saying again.
I guess that makes sense. Thank you.
Could you also help me with 4b? here: http://pmt.physicsandmathstutor.com/...s%202%20QP.pdf
its quick Im just not sure what the markscheme is saying again.
It just wants one line from each point that u would expect to see in that pattern.
Could u attach mark-scheme so i can see what it says
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MrToodles4
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#12
(Original post by Shaanv)
Are u familiar with the pattern of field lines between two similarly charged charges?
It just wants one line from each point that u would expect to see in that pattern.
Could u attach mark-scheme so i can see what it says
Are u familiar with the pattern of field lines between two similarly charged charges?
It just wants one line from each point that u would expect to see in that pattern.
Could u attach mark-scheme so i can see what it says
Yes I am familiar.
MS: http://pmt.physicsandmathstutor.com/...s%202%20MS.pdf
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Shaanv
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#13
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#13
(Original post by MrToodles4)
Yes I am familiar.
MS: http://pmt.physicsandmathstutor.com/...s%202%20MS.pdf
Yes I am familiar.
MS: http://pmt.physicsandmathstutor.com/...s%202%20MS.pdf
I would assume its the same as the field lines u get when u push two similar poles of magnets together.
But u only want one line from A and one from B
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