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^^ Awesome explanations Integrand, addressed basically everything which needs to be addressed. One other thing, your LOBF should only run from first valid data point to the last valid data point, there should be no extrapolation of a line of best fit (unless required by the question), if a...

Do I tutor you? As that is nearly EXACTLY what I say, lol. Feature is something which the aether DOES Property is something which the aether HAS Textbooks SUCK at distinguishing these

- Describe results of MM experiment (no shift in interference pattern as interferometer was rotated) - Explain cause of these results (difference in speed of light due to motion of the aether) - Desribe SR (two postulates) - Explain how constancy of the speed of light renders point 2...

Coil would experience more force, hence torque would increase, hence the coil would rotate more quickly.

Must mention how you graph it (which variables do you plot?), find gradient of line of best fit, rearrange pendulum equation to include gradient of the line of best fit. By taking the line of best fit, you are eliminating systematic error from your results, whereas by using your method...

Just remember, marks do not matter. Rank is what is important. If you get 50% in internals but are ranked 1st, you could still come first in the state.

(i) 10 seconds (as explained above) (ii) the range ~85m, therefore 85 =uxt, therefore Ux =8.5m/s (iii) After 5s, Vy = 0, use this to solve for Uy. (Should be 49m/s), then use this to find delta_Y (122.5m) (iv) Just use the components to solve for this (~80 deg above horizontal) Good...

Awesome sharing! +rep Three broken links I noticed: - Hornsby Girls 2014 - Knox 2006 - SCEGGS 2003

If there was no net force, the object would not change velocity. The satellite is obvsly changing velocity as the direction of its motion changes. There is a net force acting on the satellite, for a GEO, net force is gravity, for a LEO net force is vector sum of gravity + air resistance...

I 100% know what you are saying, but I also know it's 100% incorrect to say it. The fact that you got the correct answer is inconsequential, as in HSC Physics, we mark the PROCESS of obtaining the answer, not the answer. When students make assumptions in order to answer questions, it just...

Yes, you must as the object will accelerate due to gravity. It is only 980m above the surface of the Earth and we can assume that g=-9.8 at this Low altitude. The way I solved it was a little different, I solved for Vy using the vy^2 eqn and then used v=u +at to solve for t, it's much easier to...

Fair enough you made that assumption, it's just that the assumption is wrong. If this was a HSC question and you wrote that, you would get a big fat zero :) Constant velocity, the boosters would continue to travel at 49m/s AWAY from the Earth and never reach the Earth :)

I'm very calm? That's fine. I hope me pointing out some of the flaws in your method has helped you. If it makes you feel any better, they must have been the same mistakes which the person who wrote the answers made :)

I do not agree with th above at all. (A) is assuming that the object is not accelerating and (b) the displacement should be -980, not +980 Use delta_y = uyt+a/2(t)^2 -980 = 49t -4.9t^2 Solve for t and it comes out as t=20s. Then vy^2 =uy^2 +2aydelta_Y Vy = -147 m/s Moral of the story...

Whole heartedly endorse Steve. An excellent student who will make a great teacher and mentor to his students!

re: HSC Chemistry Marathon Archive Le Châtelier's principle**

Exactly what anamolous said. Less current = lower voltage drop across the wires = less power loss From P = V^2/R; V is the voltage drop not the transmitting voltage

re: HSC Chemistry Marathon Archive Ethanol burns completely in oxygen producing carbon dioxide and water. Calculate the volume of liquid water formed when the products are condensed at 25degC and 100kPa atmosphere if 91g of ethanol is used in the reaction

Context: Student 1 is big noting himself about how he beat student 2 last year Student 1: Sir, did Student 2 beat me in anything last year? Teacher: Yes. Life.

re: HSC Physics Marathon Archive #hscsez As above. As soon as there is a slit, there is no loop for the eddy currents to flow around in. This is one of the scenarios where if you know too much (I.e., what REALLY happens) you will get it wrong.