Its that th compound can be separated from other similar compounds (e.g isomeric etc) by th process of steam distillation. Steam distillation prevents the degradation of the compound(s) at high temperatures yet provides a "window" for the different components each so that they can be separated based on their tendency to evaporate.

 For very starting material, just bear in mind that the four quantum numbers describing an electron in an atom are all 'measures' of some vectors.

principal quantum number 'n' is a measure of the magnitude of the position vector from the nucleus to the electron

angular quantum number 'l' is a measure of the magnitude of the angular momentum vector of the electron

magnetic quantum number 'm' is a measure(not proper word) of the direction of the angular momentum vector of that electron

spin quantum number 's' is a measure(not proper) of the spin angular momentum of the electron, which is intrinsic in every electron in an atom

 It will depend on HOW u put in that charge. Remember that in a non-conductor, charges CANNOT flow. So, if u put in the charge (maybe by touching it with a charged rod) from the outside, the charges will remain outside and if u put it inside, it will remain inside. 

Following similar logic, we can conclude that ina non-conductor, it is possible to "concentrate" charges at a particular region upto a degree such that the electric field configuration due to these charges do not affect the level of its conductivity.

As per me, The Answer is as follows, and can be found out from some facts given in the NCERT book itself:

1. We NEED friction to start rolling motion, which ofcourse is a combination of translation and rotation. The friction provides the torque for the rotational motion.

2. We DO NOT NEED friction to continue rolling motion. When rolling takes place, there is no velocity of the "point of contact" and it is at rest, and no friction is required for all this.

So, if the ice is actually totally frictionless, then you can't roll the sphere at all, by giving a gentle push, anywhere you wish. So what you must do, to achive a sphere rolling on pure frictionless ice, is that you have to rotate it before putting it on ice, and the give it your "gentle push". The rotation will not be altered as there is no friction to give any sort of torque, and the translation will be due to the push. Combined, it will be a rolloing motion on ice.

CAUTION: The ice must be totally frictionless for thhis. Any observation different from this will arise because of friction arising, due to any possible factor in the environment we have not considered.

Dear sir,

I tried hard seaching for this ebook. Please, if you can, find it for me.. Of course I need a free downloadable ebook.

The book properties are:

Book Properties:

 --Yasin