2013 CSSA Physics Trial (2 Viewers)

[AnimeX]

In the last minute while trying to do 12 i realised that force was written in mN on the y axis....... still didn't get it

ahh that clearly explains the 39*... shift sin of 0.625 is 39*, DAMN shoulda read the axis LOL

 

[AnimeX]

I thought the paper was pretty good
For the torque diagram I got an upside down m because I thought it went anticlockwise, hence the direction would change
oh and I missed an easy 2 marks on the photoelectric effect... sigh

What did everyone get for the projectile question: the range of the projectile?

whattt? there was a photoelectric effect question? whichhh? i don't remember it...

and i forgot direction of all my forces, there goes like 3 marks : (

 

[iBibah]

lol who noticed the zig zag things indicating typo on a question? And the question that went to a new line twice without finishing the word?

lol some people struggled with word haha

 

[NFmusic1995]

was 39 degrees A , i just remember guessing and putting A LOL

 

[Siddy123]

whattt? there was a photoelectric effect question? whichhh? i don't remember it...

and i forgot direction of all my forces, there goes like 3 marks : (

OH FUARK.
me too

 

[NFmusic1995]

huh which questions were this for ?

The centripetal force one (first question) i just wrote to the centre, what other questions had force.

 

[iBibah]

was 39 degrees A , i just remember guessing and putting A LOL

yep it was

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What did everyone do for the prediction of special relativity and it's physical observation?

I originally talked about his thought experiment with the train, but then changed it to time dilation and how it was observed using atomic clocks.

 

[NFmusic1995]

u know how it was 12 metres, was that the dilated length or the normal length,

cause i found that as the dilated, so the real length was 20CM, hence they could not see the whole ship :/

 

[iBibah]

u know how it was 12 metres, was that the dilated length or the normal length,

cause i found that as the dilated, so the real length was 20CM, hence they could not see the whole ship :/

It was the normal length, and it dilated to 7.2m (well that's what I got)

 

[ocatal]

It was the normal length, and it dilated to 7.2m (well that's what I got)

Yeah I got that too..

 

[NFmusic1995]

fuck, i was thinking about that, but he observed the length as 12CM travelling and relativistic speeds, so wouldnt that mean the dilated length is 12cm?

 

[talcum]

I messed that question up too, it was so annoying.

What did everyone get for the last multi choice? the thing about double frequency / double wavelength / double etc etc?

 

[NFmusic1995]

Also, does that mean the observer sees the full ship or doesnt see all of it?

 

[NFmusic1995]

double the frenquency (other one was double the intensity, which i dont think is right as E = HF, increasing F increases energy hence increases the reading of current)

 

[ocatal]

Also, does that mean the observer sees the full ship or doesnt see all of it?

Doesn't see it. Because the building was 10 m wide.

 

[NFmusic1995]

ok i wrote it doesnt see it, but i did a mistake with the contracted length and real length, so i found the contracted length to be 20CM

i reckon i should just lose one mark then

 

[talcum]

Cool; I put the same answer for Q20.

with the one on balancing out the B-field, where the options were 117 or 250 volts (or something like that), what did you get?

 

[Siddy123]

It was the normal length, and it dilated to 7.2m (well that's what I got)

yep-i was kinda confused as to whether the observer would see it or not.
ended up putting that he would see it as 7.2<12

 

[AnimeX]

yep it was

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What did everyone do for the prediction of special relativity and it's physical observation?

I originally talked about his thought experiment with the train, but then changed it to time dilation and how it was observed using atomic clocks.

i did atomic clockss, soo do you remember what torque question looked like? i'm still curious... i drew mine like this (I think and hope haha), not sure if it's meant to be sharp point though..

 

[AnimeX]

fuck, i was thinking about that, but he observed the length as 12CM travelling and relativistic speeds, so wouldnt that mean the dilated length is 12cm?

pretty sure this was in metres