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re: HSC Physics Marathon Archive can someone help with this mc

Wait what are the disadvantages of superconductors in maglev trains? Hard to maintain temps below critical temperature?

i wrote about strontium 90, and i dont think it has any disadvantages when using it to detect hardness, but i didnt write explicitly it had no disadvantages, do you think ill lose marks?

u dont need an equation, you just say its triprotic

Re: why the mass of the planet plays no role in determining a satellite's orbital spe lol oops

Re: why the mass of the planet plays no role in determining a satellite's orbital spe omg i fucked up sorry it was the planet orbitting something else lol forget about this question

I thought the formula was root 2 G mass of planet / r

lol thats actually a funny joke

one more question, how does the equation change like this:

Can someone help me with this question too: Use the binomial theorem to find an expression for the constant term in the expansion of (2x^3 - 1/x)^12 Im very weak with the last two topics motion and binomial

thanks man im a dummy

what is amplitude and period of: v^2 = 16(9-x^2)

lol this is journeys, it means the trip is sometimes more than just getting from one place to another, and the important part of each trip is the experiences and understandings you gain throughout the journey

re: HSC Physics Marathon Archive ^ Why isnt it a horizontal line but negative for that mc?

for that citric acid one i forgot it was triprotic thought it was mono for some reason but did the working out and got the answer off by a 3 factor, what do you think ill get for it, its bullshit that was a 4 marker, 2 or 3 marker at most man

for the polymer mc everyones getting worked up over, a less technical way i decided between b and d is that c and d were really similar structures, and the board usually wouldnt waste 2 similar answers for no reason, so i looked between c and d and chose d lol

but do the two monomers combine to give that dimer? i cant remember off the top of my head, i went with d like most people

probably 43% or around there

ikr 4 marks is ridiculous, by the way for the x axis did you guys put the first year at x=0, i was wondering whether i should do that or not but i didn't, so theres a 1 unit gap between the x=0 and x=1950 or whatever the year was

did you get above 90? was it up or down :O