HSC Physics Predictions / Thoughts (5 Viewers)

[black.mamba]

i said the same but others said special relativity doesn't apply when gravity is involved i think?

yeah
"Special relativity applies to all physical phenomena in the absence of gravity" according to wikipedia
would non-relativistic speeds get the mark?

 

[Speed’o’sound Sonic]

yeah
"Special relativity applies to all physical phenomena in the absence of gravity" according to wikipedia
would non-relativistic speeds get the mark?

Gravity and acceleration would both be the same, because gravity is a form of acceleration. Non inertial will get marks 100%

 

[black.mamba]

yeah
"Special relativity applies to all physical phenomena in the absence of gravity" according to wikipedia
would non-relativistic speeds get the mark?

technically its not rly a limitation

 

[Fabrizio]

For the last question was it a) 1/2 for q1 and 3/4 for q2 and then b) square root of 6

 

[black.mamba]

For the last question was it a) 1/2 for q1 and 3/4 for q2 and then b) square root of 6

yeah i had q2 1.5 times of q1 which is what you got
i think b is root 6 but i got 3 because of a silly mistake

 

[Speed’o’sound Sonic]

For the last question was it a) 1/2 for q1 and 3/4 for q2 and then b) square root of 6

Lots of ambiguity on last question. I got those for part A (with v’s and q’s as well) but for b I got root (3on2)

 

[Fabrizio]

technically its not rly a limitation

That just depends on how hard they mark. Because technically it is because it asks why its a limitation applying to the capsule rather then just in general

 

[Marshall17]

And is the force required to move the rod less when there's no mag field?

 

[NoUsername]

what was the answer to the "explain the relativistic effect on the wavelength" one

The bottom term (mv) in the wavelength equation is the momentum of the particle, so you use momentum dilation formula.

 

[Fabrizio]

Lots of ambiguity on last question. I got those for part A (with v’s and q’s as well) but for b I got root (3on2)

I will check when i get home

 

[Speed’o’sound Sonic]

And is the force required to move the rod less when there's no mag field?

Yea that’s Lenz’s law for ya

 

[NoUsername]

Also what were the limitations of using special relativity? I said since it was moving slowly, it didn't really effect it and that it was non-inertial. I think the former's a bit of a stretch though

 

[Fabrizio]

Also what were the limitations of using special relativity? I said since it was moving slowly, it didn't really effect it and that it was non-inertial. I think the former's a bit of a stretch though

2nd one is 100% right. First one is a maybe depending on how hard they mark

 

[black.mamba]

2nd one is 100% right. First one is a maybe depending on how hard they mark

what else would it be then?

 

[tokyocalling]

Forreal wouldn’t be surprised if phy scaled better than ext2 this year

omg please that would be good

 

[Speed’o’sound Sonic]

Also what were the limitations of using special relativity? I said since it was moving slowly, it didn't really effect it and that it was non-inertial. I think the former's a bit of a stretch though

Yeah, non inertial was one and I also said the effect would be negligible since it isn’t travelling at relativistic speeds hence would be ineffective in analysis of motion

 

[Fabrizio]

what else would it be then?

I think both are right but maybe there is something we are missing

 

[NoUsername]

Have we agreed on anything for the Hertsprung-Russel diagram? I think I said age, because colour and luminosity are the values on the axis, so there's variation and there's stars with the same colour but different luminosity, so their surface area, and resultantly mass, must be different?

 

[Speed’o’sound Sonic]

Have we agreed on anything for the Hertsprung-Russel diagram? I think I said age, because colour and luminosity are the values on the axis, so there's variation and there's stars with the same colour but different luminosity, so their surface area, and resultantly mass, must be different?

I said mass. Didn’t have much reasoning though just a guess between mass and age

 

[Althacommie]

Have we agreed on anything for the Hertsprung-Russel diagram? I think I said age, because colour and luminosity are the values on the axis, so there's variation and there's stars with the same colour but different luminosity, so their surface area, and resultantly mass, must be different?

It's age because the question established that all the stars were X amount of light years away.