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So I did my very first HSC Physics practical exam - the pendulum from Space 9.2.1 today and for some reason I couldn't read and interpreted the procedure wrong We were supposed to measure five different length of the pendulum only one time each, but instead I repeated five measurements for...

What is the difference between molar heat of solution and molar heat of combustion?? Thank you!!

Re: HSC 2016 3U Marathon Hi, this is a question from Chapter 10: Polynomials of TERRY LEE 3U "Prove that the curves 6y=x^3+3x^2-9x-27 and 3y=x^3-3x^2 +9x-27 have only a point of intersection and show that the two curves are tangential to each other." So, by equating the two I got...

Hi this is a question from Chapter 10: Polynomials of Terry Lee 3U. "Given that the equation 2x^4+9x^3+6x^2-20x-24=0 has a triple root, factorise it completely." Using the multiplicity theorem, I differentiated it twice and found the triple root as follows.. P'(x) = 8x^3+27x^2+12x-20...

so far I've learnt that the formulas to the general solutions of trigonometric equations which are:- sinx = a + k360, (180-a) + k360 cosx = +/-a + k360 tanx = a + k180 but these formulas don't seem to apply in every case for example, using the formula, the solution to cosx = 0 would be...