Search results

I thought society would have shifted away from the notion of penalty by death by now. It is utterly inhumane to selfishly take the life of another man. Sure, whilst people may argue that they are facilitating self harm and potential deaths of others, there will be more like them to take their...

re: HSC Physics Marathon Archive The answer is D To feel the sensation of apparent weightlessness, C may be a viable choice. This is because the atoms within your body are accelerating towards the ground at the same rate as the spaceship would be accelerating due to gravity towards Earth. But...

Limited evidence for special relativity? Did you mean limited evidence for the existence of the aether? The apparatus they constructed was quite precise at the time, and if there was any shift in interference pattern i.e. changes in the speed of light when the apparatus was rotated through 90...

re: HSC Physics Marathon Archive True, pretty much 99% efficient

re: HSC Physics Marathon Archive yes, which is another reason why some of the power is lost from the system, and Vp > Vs

re: HSC Physics Marathon Archive This equation is not entirely valid. It assumes that the transformer is 100% efficient in transforming power, as input power = output power. According to the L.O.C.O.E, energy is never destroyed, but transformed into other forms. In a real life scenario, some...

Could you please provide some insight into how to use RHG rule to solve this q?

Yes, but can you explain why it's anti-clockwise and not clockwise?

Ok, let's look at one of the main postulates of Lenz's law; Lenz's law states that an induced current produces a magnetic field that opposes the changing flux that created it in the first place. Now, we will consider this case: Consider a single point on that copper disc. As the magnet rotates...

?

re: HSC Physics Marathon Archive Yes, in this case, r represents the distance from the centre of the sun to Neptune (orbital distance)

In terms of motors, a rotating armature (carrying the rotor coils) that moves through an external magnetic field will cut magnetic field lines, and will hence experience a changing flux. According to Faraday's law (which states EMF is proportional to change in flux/change in time), a changing...

That statistic was exaggerated. No course would have a band 6 rate that low... http://www.boardofstudies.nsw.edu.au/ebos/static/BDHSC_2014_12_15130.html Here is last year's statistics imo, the main reason why people don't get band 6's in english is the fact that the course is compulsory...

re: HSC Physics Marathon Archive ? my calculation is correct.

re: HSC Physics Marathon Archive mv = mo/sqrt(1-v^2/c^2) When travelling at relativistic speeds, outside observers will see that the mass of the proton increases So sub mo = mass of proton (from data sheet) and you should get a mass larger than the stated mass

re: HSC Physics Marathon Archive No, this is the derivation process. I simply explained that the sum of forces acting on a rocket during launch is thrust minus mass due to gravity So the final equation for thrust is T = mg+ma

re: HSC Physics Marathon Archive well it's actually sigmaF = ma so T-mg = ma and T = ma+mg

re: HSC Physics Marathon Archive He meant (9.8+a)/9.8

If it were due to the motor effect, the initial current flowing through the conductor will interact with the external magnetic field to experience a force that would push it along the rails. There is no initial current flow, but rather, it is pushed along the magnetic field which causes the...

It states "in a completed circuit" so lenz's law applies, and the rod will stop.