Recent content by net_nubie

Could you explain what is topological dimension please?

S is change in entropy. S,therefore, is less than zero when oil and water are mixed. Also, G has to be <0 for a spontaneous process. Heat of solubility is positive for an oil-water mixture, so for the process to take place, T should be less than zero, which is impossible.

sorry guys. and thanks. it got posted twice 'cause my connection got cut-off when i clicked submit the first time.

You are missing a point here. Entire calculus is based on approximations. The goal of mathematics is to solve problems and in doing so some steps are required to be taken. In Archimedes' method for finding the area of a circle, the circle has to become a polygon of infinite sides, but to prove...

You are missing a point here. Entire calculus is based on approximations. The goal of mathematics is to solve problems and in doing so some steps are required to be taken. In Archimedes' method for finding the area of a circle, the circle has to become a polygon of infinite sides, but to prove...

Well, I may be missing something, but I don't see the reason for any confusion here. If you define electrons by quantum numbers, then you cannot have 2 electrons with the same quantum number in an atom. As far as free electrons go, you cannot determine there position according to Heizenberg's...

I've voted yes, mainly because whenever we solve any problem, we assume that the observer is present. Also if the observer is not physical, how can it 'observe'; if it is not physical, then why talk about it in physics.

hence no. of molecules=2.95*6.023*10^23 hence no. of atoms= no. of molecules*no. of atoms per molecule(9 in your case, though it is Ba (OH)2, i.e. 5):smile: Strontium hydroxide is Sr (OH)2 hence no. of formula units= no. of atoms hence mass = (molarmass/avogadro's no.)*no. of units same...

Hallsofivy got it right. When I said "lift his own weight" I meant lifting his new weight after the change in size.

Can someone please tell me the difference between Clemensen's reduction and the Wolf-Kisher reduction?

Well, I ain't sure of this but consider a 1-Methyl-2-butene. When HCl adds across the double bond, Cl radical will attract the electrons of the C=C towards itself creating a partial +ve charge on the C atoms. This partial positive charge is handled better by a 3rd degree C atom than the 2nd...

People, suppose a man can lift a weight equal to his own weight 2 mtrs. off the ground with very little effort. If his dimensions (i.e. LENGTH, BREDTH, HEIGHT) are increased 10 times, keeping his average density constant, will it be easier for him to lift his new weight 2 mtrs. off the ground...

Centrifugal force? Hi people, Can someone explain to me what is centrifugal force? Please tell me the equations related to it. I have tried by best to calculate it, but I have drawn a blank.

I also have another problem that will be good practice. In the same situation, only take the angles to be 30° and 60°, let the mass of block on 30° be 3 times that of the one on 60°. Also, let the pulley be massive and the coefficients of static friction between 30° be half of that on the 60° side.

Sid, there is no friction. Since the pulley and string are massless, the tension is uniform and is equal to the sum of the components along the slope viz. mg sin 18° and mg sin 72°. The acceleration will be in the direction of greater force. Force along the slope will be given by (mg sin 72° -...