Chemistry and physics are an important part of any scientific curriculum. They are quite important subjects as these subjects offer a deep insight of the scientific world. Physics explains the mechanics behind the working of machines where as chemistry explains the chemical reactions that are responsible for the creation of certain chemicals. In every school much stress is laid on these two subjects so that students can learn about the fundamental of these subjects and apply them in real life. In a more advanced level these two subjects play an effective role in shaping a student’s life as it helps them to build their career in the field of engineering. These books of chemistry and physics consist of principles and theories that have been discovered by the famous scientists. Now let us discuss the relevance of both these subjects individually. To start with chemistry we can say that chemistry is that part of science that deals with the study of chemical compositions and atoms. In fact, a major part of the subject includes the understandings through which chemicals react with each other. The word chemistry was derived from alchemy a Persian word. Today, we can find the usage of chemistry in our everyday life. Since it is difficult for the common man to understand complex chemical reactions let us take an example from our everyday life. We all know that while cutting an onion we always get tears in our eyes. Why is that so? Well, there is a strong chemical reason behind this. The lachrymatory factor perhaps is the reason that brings tear to the eyes. When an onion is cut immediately a volatile sulphur compound is released in the air. The moment it is released in the air it is then broken down and is converted in to lachrymatory factor. It was in the year 2008 when Crop & Food Research of New Zealand in association with House Foods Corporation of Japan started producing tear free onions. Physics, on the other hand is one of the ancient academic subjects that are studied. They are mainly divided in to two parts that are classical and modern physics. As far as the classical physics is concerned it deals with the study of optics, electromagnetic and thermo dynamism. Modern physics on the other hand deals with the modern day applications of physics. Mathematics forms a vital part of physics. Persons or students who want to pursue physics as their career should have a very good knowledge about maths and should be expert with the numbers. Many Handbooks of Chemistry and Physics are available in the market today. These books offer a handful of information about all the laws and principles used in the modern day world to make the complicated tasks easier. These books are often used by students in the form of guides and references. A variety of these kinds of books are also available in many online stores. You can find some of them at a competitively low price by opting from the various types of deals that are available.