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June 2011 G485-Fields, Particles and Frontiers of Physics

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"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 :smile:

Yes, that's right.

Reply 41

sulexk

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 :smile:

Reply 42

Summerdays

Original post by sulexk

Okey dokey. It helps me as well :smile:

Reply 43

ChoYunEL

Most annoying exam ever..
You have to get everything to the mark scheme, for serious.
It's like 65% worded and 35% equations.

Reply 44

Summerdays

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?

Reply 45

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

Reply 46

Summerdays

Original post by ChoYunEL

Because the unit of charge is coulomb :redface:

But yeah, it's a bit silly sometimes.

Reply 47

sulexk

Original post by Summerdays

Because the unit of charge is coulomb :redface:

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!

:smile:

All the best everyone, I hope you all do well!

Reply 48

Oh my Ms. Coffey

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.

(edited 12 years ago)

Reply 49

sulexk

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!!

Reply 50

Oh my Ms. Coffey

A poster on the Endoscope and Gamma Camera.

Reply 51

sulexk

Original post by Oh my Ms. Coffey

A poster on the Endoscope and Gamma Camera.

Thank you

Endoscope, is that included in the spec?

Reply 52

Oh my Ms. Coffey

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.

Reply 53

sulexk

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 :smile:

I use this one

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!

Thank you :smile:

Reply 56

anshul95

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 :smile:

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.

Reply 57

anshul95

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.

Reply 58

Oh my Ms. Coffey

Original post by anshul95

Did you notice in the book about the 'error' of how they define Non-invasive techniques on the spread?

Reply 59

ChoYunEL

A self assessment guide, given by my teacher.
If an endoscope comes up, I'll be thanking the poster. lol

5.4.2 Diagnosis methods in medicine
(a) describe the use of medical tracers like technetium-99m to
diagnose the function of organs;
(b) describe the main components of a gamma camera;
(c) describe the principles of positron emission tomography (PET);
(d) outline the principles of magnetic resonance, with reference to
precession of nuclei, Larmor frequency, resonance and relaxation
times;
(e) describe the main components of an MRI scanner;
(f) outline the use of MRI (magnetic resonance imaging) to obtain
diagnostic information about internal organs;
(g) describe the advantages and disadvantages of MRI;
(h) describe the need for non-invasive techniques in diagnosis;
(i) explain what is meant by the Doppler effect;
(j) explain qualitatively how the Doppler effect can be used to
determine the speed of blood.