Physics Exam Thoughts (1 Viewer)

[FieryFX]

What did everyone get for the acoustic impudence of fat?

 

[asiansensation46]

Think there's two possible answers. One is greater than the kidney impedance and one is less than. Both should be correct.

 

[FieryFX]

did you write both? i had a quadratic and scrapped it cause i didnt think there would be two

 

[jryl]

I changed my answer from high frequency 50kHz to 50hz, how could changes in flux be occurring faster than the current that induces them so went with low.

 

[jasperisanerd]

Wasn't a fan of most of the paper but loved Age of Silicon option. Especially the 7 mark question with the fire alarm system.

 

[asiansensation46]

Nah lol don't write both. I only know from hearing peoples answers.
You also didn't need to keep it in a quadratic, could've just took the roots of both sides.

 

[asiansensation46]

Yeah I agree it should have been 50Hz. Lots of people put 50kHz that I've asked but.

 

[sourish]

https://www.matrix.edu.au/2018-hsc-...solutions&mc_cid=a64b2ded7e&mc_eid=2566699dad

 

[JaxsenW]

Yeah apparently answer was ~424ms^-1
Whilst most apparently did it by equating E, I did it by calculating the g on moon (from given data), and then subbed it and delta y=500km into the projectile motion questions. I got the same answer, but will I lose a mark based on my incorrect assumption that g would be constant up to that height?

 

[asiansensation46]

Wouldn't be full marks lol

 

[supR]

Yeah I agree it should have been 50Hz. Lots of people put 50kHz that I've asked but.

Its 50kHz google it c:


Sent from my iPhone using Tapatalk

 

[Ace0804]

ummm guys matrix already put up the solutions for the physics test, you can check your answers for the mutlis

 

[782341]

Can anyone explain how a 78 and an 83 raw both got aligned to 90 in 2017 physics (according to raw marks website)

 

[Ace0804]

some people just fake it as well, cause anybody can edit it

 

[FieryFX]

How accurate are the matrix answers?

 

[FieryFX]

some people just fake it as well, cause anybody can edit it

http://rawmarks.info/wiki/index.php?title=Main_Page&action=edit


not everyone can edit. Im pretty sure that they are submitted and verified before published.

The most likely answer for both marks being a 90 is that both lied within the 90th percentile of marks which isnt unreasonable to assume

 

[782341]

How accurate are the matrix answers?

Im not too sure myself but i guess they would be a reasonable indication of what you should have written although they would probably accept a variety of answers for certain questions.

 

[1729]

for a DC motor does the force direction actually change every 180 deg? Wouldn't it only change if there WASNT a SRC? so shouldnt force direction be constant?

 

[DrEuler]

The difference in the RAW mark cutoff for a band 6 is due to the option topics. One may be difficult than the other and thus they align differently

 

[TheZhangarang]

for a DC motor does the force direction actually change every 180 deg? Wouldn't it only change if there WASNT a SRC? so shouldnt force direction be constant?

It was a bad question because the diagram didn't show the section of the motor where the split ring commutator would've been located. However, because the question said that it was a DC motor, you can infer that a split ring commutator was there