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HSC Physics Marathon 2013-2015 Archive (4 Viewers)

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astroman

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re: HSC Physics Marathon Archive

Question how would you show how a spectroscopic binary can be identified through a diagram?
 

Kaido

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re: HSC Physics Marathon Archive

In the mean time:
Discuss the BCS theory of superconductivity.(~4-6 marks, i just made the question up lol)
 

astroman

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re: HSC Physics Marathon Archive


would this be a good simple diagram of a dc motor?
 

Kaido

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re: HSC Physics Marathon Archive

Slightly complicated
I recommend the motor from the Jac textbook
 

astroman

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re: HSC Physics Marathon Archive

Past exam question, how would you explain how a photocell works using a diagram? It does not clarify wheter it wants a photovoltaic, photoelectric or photovoltaic cell.
 

anomalousdecay

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Past exam question, how would you explain how a photocell works using a diagram? It does not clarify wheter it wants a photovoltaic, photoelectric or photovoltaic cell.
Yep exactly.

That question from the 2013 paper was really open and not specific.

http://community.boredofstudies.org/1086/physics/313967/full-examination-paper.html

Big debates in that section in general about that 5 marker.

As an Engineer, I will still say that a solar cell can be photoelectric or photovoltaic.

I based my answer off a photovoltaic cell. I got my paper back and was given 5/5.
 

astroman

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re: HSC Physics Marathon Archive

what is the main source of energy production for blue giant stars? I cannot find any info on that.
 

Kaido

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From my prelim knowledge: Giants energy source is the nuclear fusion of Helium molecules
 

astroman

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re: HSC Physics Marathon Archive

identify the initial and final elements of the principle sequence of nuclear reactions for a main sequence star?
 

photastic

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thanks, can you clarify what it means by principle sequence?
Basically the fundamentals of the nuclear reactions, how and when the reactions occur for main sequence stars.
 

astroman

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This is a 2011 HSC diagram, what term describes 18K for this metal alloy?
 

astroman

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re: HSC Physics Marathon Archive

can someone help with Q9 part b, i keep getting 5.67x10^11

 
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