HSC Physics Marathon 2013-2015 Archive (1 Viewer)

Status
Not open for further replies.

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

What order is everyone doing the exam tomorrow?
Might do the quick multiple choice questions first...leaving out all the harder ones till later.
Then do all the quick short answer questions.
Then do the longer short answer questions and the 6/7/8 marker.
Do the Option (apart from 6/7/8 marker)
Finish Multiple Choice
Do 6/7/8 marker from Option
 

duhdevitt

Active Member
Joined
Oct 6, 2014
Messages
191
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

Explain why you are tackling it this way.
In all my exams I've done, quanta had been the easiest so I finish it first which increases my motivation, then short answers
 

atargainz

Active Member
Joined
Jun 22, 2015
Messages
289
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

Might do the quick multiple choice questions first...leaving out all the harder ones till later.
Then do all the quick short answer questions.
Then do the longer short answer questions and the 6/7/8 marker.
Do the Option (apart from 6/7/8 marker)
Finish Multiple Choice
Do 6/7/8 marker from Option
I'll probably be doing a similar approach:
1) MC first
2) Option (leaving out the high marker)
3) Short answers (leaving out the high markers)
4) Go back and spend as much time as possible on the 6/7/8 markers making sure to cover everything
 

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

GUYS! URGENT HELP NEEDED.

I've forgottn how to do relativity questions like time dilation/mass increase/length contration.

I don't know what to make lo , vo and mo and what to make l, v ,m ??

HELP!!
 

malcolm21

Active Member
Joined
Nov 7, 2014
Messages
437
Gender
Male
HSC
N/A
re: HSC Physics Marathon Archive

GUYS! URGENT HELP NEEDED.

I've forgottn how to do relativity questions like time dilation/mass increase/length contration.

I don't know what to make lo , vo and mo and what to make l, v ,m ??

HELP!!
lv is the length viewed by the observer that is not at the rest frame of reference while lo is, same thing with m and v
 

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

so what about this question. Is 1.7 x 10^5 the lv or lo value??

 

Kaido

be.
Joined
Jul 7, 2014
Messages
823
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

so what about this question. Is 1.7 x 10^5 the lv or lo value??

calc l(v) = 1.7x10^5 etc
etc being the root shit
l(v)= 760.26ly
 
Last edited:

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

answers say:

lv = 1.7x10^5 *root (rubbish)

like kaido said
 

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

Difference between relativity and Special relativity???
 

InteGrand

Well-Known Member
Joined
Dec 11, 2014
Messages
6,109
Gender
Male
HSC
N/A
re: HSC Physics Marathon Archive

Difference between relativity and Special relativity???
Special Relativity is a special case of relativity where you always assume constant velocity (so only considering inertial frames of reference).

In General Relativity, you consider the general case of non-constant velocities, so the frames of reference are non-inertial. General Relativity is much harder than Special Relativity.
 

Kaido

be.
Joined
Jul 7, 2014
Messages
823
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

Difference between relativity and Special relativity???
Assuming you mean galilean relativity, its only applicable at lower, non-relativistic speeds (e.g. addition of velocities which you learn in moving about)
 

Thjv

Member
Joined
Sep 10, 2014
Messages
42
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

Difference between relativity and Special relativity???
The theory of relativity states that the laws of physics are the same for all inertial frames of reference; it is impossible to conduct a physical experiment within an inertial frame without reference to an external point. The principle of special relativity revolves around the concept of relativity, however also states that the speed of light is constant for all frames of reference (3x10^8m/s) regardless of the observer's motion.
 

Kaido

be.
Joined
Jul 7, 2014
Messages
823
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

Special Relativity is a special case of relativity where you always assume constant velocity (so only considering inertial frames of reference).

In General Relativity, you consider the general case of non-constant velocities, so the frames of reference are non-inertial. General Relativity is much harder than Special Relativity.
You also consider the effects of gravity (as a 4D space-time continuum) in General Relativity
Havent read too much lel
 

Mr_Kap

Well-Known Member
Joined
Mar 24, 2015
Messages
1,131
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

So what does this question actually mean?
 

TQuadded

Breaking the limits.
Joined
Sep 11, 2014
Messages
342
Location
In a parallel universe.
Gender
Male
HSC
2015
re: HSC Physics Marathon Archive

So what does this question actually mean?
The theory of relativity states that the laws of physics are the same for all inertial frames of reference; it is impossible to conduct a physical experiment within an inertial frame without reference to an external point. The principle of special relativity revolves around the concept of relativity, however also states that the speed of light is constant for all frames of reference (3x10^8m/s) regardless of the observer's motion.
Remove the parts for special relativity from his answer and elaborate more on the frames.
 
Status
Not open for further replies.

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top