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Question: A student measured the magnetic flux through a solenoid of 100 turns and entered data into a spreadsheet. Her data is graphed below: A good description of the potential difference generated in the solenoid would be: What i thought it was: A What the answer is: D I thought it was...

^ confirmed. @OP i'm going to check who this is tomorrow.

Post them up.

What i think it is lol:

1. Going to leave it to others as i'm not 100% sure 2. \int bsin(\pi/b)x dx[/tex] = -\frac{b}{\pi} bcos(\pi/b)x = -\frac{1}{\pi}cos(\pi/b}x + c 3. tan(\frac{\pi}{2} + x) = tan(\frac{\pi}{2} - (-x)) = cot(-x) = -cotx -cotx = - (-\frac{\sqrt{1 - k^2}}{k}) = \frac{\sqrt{1 -k^2}}{k} A

Are you allowed to just explain why its divisible by 2 (without induction), then prove its divisible by 15 by induction to prove its divisible by 30? k^5 - k = k(k + 1)(k - 1)(k^2 + 1) There are two consecutive numbers here so it must be divisible by 2.

will you be my friend?

B?

aren't you nightweaver?

then who are you?

who am i?

you?

you

hey nightweaver

Thanks for the estimates guys! Any others? lol I'll need to kick it up a notch for English

Divide through by (cosx)^2, then change (secx)^2 to 1 + (tanx)^2.

Ranks: English Advanced - 5/31 MX1 - 2/59 MX2 - 2/29 Chemistry - =1/64 Physics - 2/65 School rank has jumped quite a bit these past few years (jumping 100 ranks up and down lol), but on average is around 130-140. Is it possible i'll reach my aim? I think English is going to kill my ATAR.. Thanks

lol right. Checked wrongly. Will just wait for OP

Do you mean divisible by 3 and prove for n \geq 2?

dentistry or actuarial studies + science :D what about you?