2013 CSSA Physics Trial (3 Viewers)

[NFmusic1995]

yeah sorry i meant metres haha

also for special rel i spoke about the mirror thought experiment if thats right :/?

 

[big_bang344]

Do all schools have to do the Physics on the same day if they are using the CSSA paper?

 

[iBibah]

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)

It's not double the frequency. Once the threshold frequency is reached, increasing it even more makes no difference. Intensity controls the rate of emission of electrons, which is what current is: a rate. Hence A was the answer.

Increasing energy is not increasing current.

 

[iBibah]

Do all schools have to do the Physics on the same day if they are using the CSSA paper?

yeep

 

[bfoo]

Guys i forgot to put the direction of the torque.. think its neccessary?
Also for the einsteins thing I talked about muons

 

[iBibah]

Guys i forgot to put the direction of the torque.. think its neccessary?
Also for the einsteins thing I talked about muons

Shit so did I :/

It should matter, unless the question already stated which way it was rotating?

 

[bfoo]

Shit so did I :/

It should matter, unless the question already stated which way it was rotating?

I think we needed to put anticlockwise, lol gg gamesetmatch.
There was a diagram so yer T_T

 

[AnimeX]

Shit so did I :/

It should matter, unless the question already stated which way it was rotating?

Question stated that motor was rotating anti clockwise

 

[Hypem]

For the rocket question:

For part of it I said since a is proportional to 1/m, as mass decreases, acceleration increases.

Did I have to also mention a = F/m, and since F (thrust) remains relatively constant, acceleration increases? Since even though a is prop. to 1/m, the force could decrease as mass decreases to compensate :/ probably lost a mark..

 

[iBibah]

For the rocket question:

For part of it I said since a is proportional to 1/m, as mass decreases, acceleration increases.

Did I have to also mention a = F/m, and since F (thrust) remains relatively constant, acceleration increases? Since even though a is prop. to 1/m, the force could decrease as mass decreases to compensate :/ probably lost a mark..

 

[curtisyu0328]

Does anyone here have 2009 CSSA physics solution?

 

[AnimeX]

lol i forgot the T-mg / m bit but I did the a= netforce / m, will I still get the marks?