June 2011 G485-Fields, Particles and Frontiers of Physics Watch

sulexk
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#41
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#41
(Original post by Summerdays)
Binding energy is the minimum energy needed to seperate a nucleus into intos constituent nucleons. This is proportional to the mass defect of the nucleons, because some matter from the nucleons is used to bind the nucleons together. This means the total mass of the constituent nucleons is less than the mass of the nucleus, due to loss of potential energy. Mass defect = Binding energy/c^2 followed by Einsteins famous equation, e =mc^2; mass and energy are equivalent. Work is needed to be done to seperate the constituent nucleons in a nucleus (thus gaining energy/mass.)
"This means the total mass of the constituent nucleons is less than the mass of the nucleus, due to loss of potential energy"

Is the total mass of the constituent nucleons greater than the mass of the nucleus?

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Summerdays
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#42
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(Original post by sulexk)
"This means the total mass of the constituent nucleons is less than the mass of the nucleus, due to loss of potential energy"

Is the total mass of the constituent nucleons greater than the mass of the nucleus?

Thank you
Yes, that's right.
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sulexk
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#43
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(Original post by Summerdays)
Yes, that's right.
Thank you for this- I shall ask and do my best to answer questions!

Its awesome that you have brought this up.

I shall be going through nuclear physics soon and shall post some questions soon!

Thank you once again
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Summerdays
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(Original post by sulexk)
Thank you for this- I shall ask and do my best to answer questions!

Its awesome that you have brought this up.

I shall be going through nuclear physics soon and shall post some questions soon!

Thank you once again
Okey dokey. It helps me as well
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ChoYunEL
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#45
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Most annoying exam ever..
You have to get everything to the mark scheme, for serious.
It's like 65% worded and 35% equations.
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Summerdays
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(Original post by ChoYunEL)
Most annoying exam ever..
You have to get everything to the mark scheme, for serious.
It's like 65% worded and 35% equations.
Anything in particular you don't understand?
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ChoYunEL
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#47
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There wasn't anything I didn't particularly understand.
It seems like you have to be very word on word with the mark scheme.

Define the farad.
The unit of capacitance, charge per voltage.

It didn't get marked.
coulomb per volt - Allow: 1 F = 1 CV-1
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Summerdays
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(Original post by ChoYunEL)
There wasn't anything I didn't particularly understand.
It seems like you have to be very word on word with the mark scheme.

Define the farad.
The unit of capacitance, charge per voltage.

It didn't get marked.
coulomb per volt - Allow: 1 F = 1 CV-1
Because the unit of charge is coulomb But yeah, it's a bit silly sometimes.
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sulexk
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#49
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(Original post by Summerdays)
Because the unit of charge is coulomb But yeah, it's a bit silly sometimes.
Shall we begin.

Shall we begin- on this thread - today, to write up notes for Medical imaging as well as other topics. I believe there are notes already published, which can be downloaded. However I am saying that we start fresh, so when the exam comes, we will have understood and gone through the topics enough times, so it is clear as crystal in our minds.

I say we begin with medical imaging, particularly MRI and PET(as these could come up, especially PET). Let us now search for some past paper questions and make up questions, so that we may question and then enhance our knowledge on these topics.

LET US BEGIN TODAY!

All the best everyone, I hope you all do well!
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Oh my Ms. Coffey
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I'll add some medical posters I made, only got pictures of them right now.


Has anyone noticed that the book defines 'Non-invasive techniques' as techniques that do not in involve ionising radiation when that is the wrong definition.
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sulexk
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#51
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(Original post by Oh my Ms. Coffey)
I'll add some medical posters I made, only got pictures of them right now.
Hello, is it okay, if you could keep this thread clean please.


Thank you!!
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Oh my Ms. Coffey
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#52
A poster on the Endoscope and Gamma Camera.

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sulexk
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#53
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(Original post by Oh my Ms. Coffey)
A poster on the Endoscope and Gamma Camera.

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Spoiler:
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Thank you

Endoscope, is that included in the spec?
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Oh my Ms. Coffey
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(Original post by sulexk)
Thank you

Endoscope, is that included in the spec?
Yep, enjoy the endoscope questions in Examination questions. Made little sense before I made the poster.
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sulexk
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#55
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(Original post by Oh my Ms. Coffey)
Yep, enjoy the endoscope questions in Examination questions. Made little sense before I made the poster.
I have been using the blue ocr physics textbook, with the lhc front cover, there have never been any questions on the endoscope?

But thank you
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Oh my Ms. Coffey
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I use this one
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sulexk
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#57
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(Original post by Oh my Ms. Coffey)
I use this one
Yes, I also have that book, and you are absolutely right, its in there- however It may not be in the spec, but you never know, they could test on it!

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anshul95
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(Original post by sulexk)
Yes, I also have that book, and you are absolutely right, its in there- however It may not be in the spec, but you never know, they could test on it!

Thank you
no they can't it isn't in the syllabus - and they have taken out the total internal reflection stuff anyway so I highly doubt it will come up.
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anshul95
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(Original post by Oh my Ms. Coffey)
Read those PDF's above, wonderful.
Yes they are quite good but sometimes he makes silly mistakes like he mixed up the definition of step down and step up transformers and also compton scattering and pair production. Maybe I'm just being picky.
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Oh my Ms. Coffey
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(Original post by anshul95)
Yes they are quite good but sometimes he makes silly mistakes like he mixed up the definition of step down and step up transformers and also compton scattering and pair production. Maybe I'm just being picky.
Did you notice in the book about the 'error' of how they define Non-invasive techniques on the spread?
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