Quark-Quark force caused by the exchange of particles called' gluons' is the basic force.

The theory with which scientists try to unify all forces is called unified field theory.

Weakest force - Gravitational force.
Strongest force - Strong nuclear force.

Geology.

Astronomy.

Conserved quantities are those physical quantities that remain unchanged in a process.

Laws of Thermodynamics.

C.V. Raman (the great Indian scientist) received Nobel prize for his work on molecular spectra.

Hess, Austria.

Three important laws of conservation from nature are:
1. Law of conservation of energy.
2. Law of conservation of momentum.
3. Law of conservation of angular momentum.

The two most important contributions of Albert Einstein are 'theory of relativity' and 'explanation of photoelectric effect'.

The industrial revolution in England and Western Europe more than two centuries ago was triggered by some key scientific and technological advances.
A few of which are given below
(i) Discovery of electricity
(ii) Invention of powerloom, safety lamp, cotton gin, steam engine, etc.

Few important factors which have hindered the advancement of science in India are given below
(i) Poverty, due to which there is a lack of resources and infrastructure
(ii) Poor management of science education
(iii) Lack of scientific planning
(iv) No coordination between researchers and industrialists

It is well known that to win over votes, politicians would make anything and everything possible even when they are least sure of the same. That is why, we say that politics is the art of possible.
The statement that science is the art of the soluble implies that a wide variety of physical phenomena are understood in terms of only a few basic concepts, i.e. there appears to be unity in diversity as if widely different phenomena are soluble in a few theories and can be explained in terms of only a few fundamental laws.

The physical world, when seen by a layman, presents us with such a wide diversity of things. It seems incomprehensible, i.e. as if it cannot be understood.
On study and analysis, the scientists find that the physical phenomena from atomic to astronomical ranges can be understood in terms of only a few basic concepts, i.e. the physical world becomes comprehensible. This is what is meant by Einstein's statement made above.