Problem Solving Strategies

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John Rennie

04:41

@PinkAura The best reason for doing something is that you will enjoy it. If you think it will be fun then I'd say go for it..

@user20458579510081670432 That's way more advanced than anything I have ever studied so I can't comment on it,

Note that it does not disprove the third law of thermodynamics, it disproves the third law of black hole thermodynamics.

When it was realised that black holes could be described using thermodynamics laws of black hole thermodynamics were formulated that are similar to the laws of thermodynamics but not exactly the same.

See here for more details:

Black hole thermodynamics

In physics, black hole thermodynamics is the area of study that seeks to reconcile the laws of thermodynamics with the existence of black hole event horizons. As the study of the statistical mechanics of black-body radiation led to the development of the theory of quantum mechanics, the effort to understand the statistical mechanics of black holes has had a deep impact upon the understanding of quantum gravity, leading to the formulation of the holographic principle. == Overview == The second law of thermodynamics requires that black holes have entropy. If black holes carried no entropy, it would...

user 20458579510081670432

05:22

Okay, 👌 thanks for responding.

John Rennie

@user20458579510081670432 A lot of these proofs are not directly applicable to the real world. For example in the real world it takes an infinite time for an event horizon to form so in fact there are no black holes in our universe.

The proof shows an extremal black hole can be formed, but it isn't clear to me whether it could be formed in a finite time i.e. whether we observers outside the black hole could ever observe it.

user 20458579510081670432

Right.

So textbooks don't need to be changed.

John Rennie

I doubt any textbooks will be rewritten as a result of the paper :-)

123

05:47

Hello Everyone...

8 hours later…

PinkAura

13:22

@JohnRennie hmm i want to prepare for it , the level of this examination is good, but i need to also keep in mind of JEE prep..

anyway

sir, i have few doubts

my teacher told capacitance is somewhat maximum charge which can be stored on a conductor in a given medium, but then we state the formula of capacitance as C=Q/V , how does this formula relate to maximum charge storage?

John Rennie

14:05

@PinkAura I'm not sure what your teacher means. I have always used your definition C = Q/V.

@PinkAura I think it's probably wise to concentrate on the JEE work. It's hard enough without having extra distractions.

2 hours later…

PinkAura

15:44

@JohnRennie he says that, if you keep on giving charge to a conductor , after a point of time, the electric field due to it would become strong enough to break /separate the molecules of medium into two poles (+) , (-), one of which comes on the surface of conductor to neutralise it whollly

@JohnRennie I agree

@JohnRennie sir, capacitor is capacity to store what? energy? how does it actually store it? and what do we mean by it?