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what goldy is saying is perfectly correct.

lol shit

biggest BS i have ever heard.

Re: General Thoughts: Physics and lol the meissner effect one didn't have any correct answers cos of poor wording hahaha

Re: General Thoughts: Physics nope it should have the gap that corresponds to the predominant energy of the light. still not sure if my answer is correct though. anyone have confirmation?

Re: General Thoughts: Physics I think 20 is B.

C it is. That being said, the effing motor has 3 turns on one side and 4 on the other, so poor question is poor lol.

I would talk about the inertial and non-inertial frames of reference experiment.

no, they are on the main sequence before they go to red giant. protostar ----> main sequence ----> red giant ----> planetary nebula -----> white dwarf

yeh I've just been looking over questions and theory, really I can't do much more other than be ready for anything they could throw at me. Hopefully it is a perceptive and difficult test tomorrow.

show that f'(x) is > 0 for all values. To do this show that the discriminant is less than 0 and test a point on the curve to show it must be always positive.

well it was in 2005 HSC. and its not ridiculous, it just requires thinking which is what students should be able to do.

you could also talk about the equal and opposite reaction from the burning of fuel. something like "the propulsion of the gas particles in the fuel when burnt provided an equal and opposite force that propelled the rocket towards earth (newton's third law)"

nope. 1. Superconductors are only used in levitation 2. Superconductors are on the train and not the rails. 3. They are not fed with AC current, they are fed with DC current yet alternated by a switch. 4. large eddy currents are not formed, there is just a constant repulsion between the current...

Nope, the superconducting wire in the solenoid on the train is purely just to make a stronger repulsive magnetic field. The mass of the train is WAY to heavy for the meissner effect to be used to levitate, as the force of gravity would result in the current in the superconductors being too large...

refer to my above answer on this page

Guys, maglev trains are NOT levitated due to the meissner effect.

good answer. Maglev trains are trains that are not in contact with the ground due to the use of electromagnets for levitation and propogation There are 2 types of maglev trains currently in operation, Electrodynamic suspension and electromagnetic suspension systems. (ill just discuss EDS cos...

A beam of blue light is shone upon a platinum cathode within a vacuum tube. This circuit contains a galvanometer, and no current flows in the circuit. The platinum cathode is replaced with a zinc cathode and blue light of the same intensity shone upon it. A current flows. Explain this...