NCERT Exemplar Problems for Class 11 Physics in PDF Form DownloadThese books contain MCQ questions, Short questions and Long answers questions for complete revision of the chapters. If you are having any suggestion for the improvement, your are welcome. The improvement of the website and its contents are based on your suggestion and feedback. Dear sir, I liked your website especially your website font. Can you send me this font to my email or Font name to be downloaded. Your email address will not be published. Physics deals with the study of basic laws of nature related to matter, energy and their manifestation in different phenomena.
Properties of Matter, 5/e
In classical physics and general chemistry, matter is any substance that has mass and takes up space by having volume. However it does not include massless particles such as photons , or other energy phenomena or waves such as light or sound. These include classical everyday phases such as solid , liquid , and gas — for example water exists as ice, liquid water, and gaseous steam — but other states are possible, including plasma , Bose—Einstein condensates , fermionic condensates , and quark—gluon plasma. Usually atoms can be imagined as a nucleus of protons and neutrons , and a surrounding "cloud" of orbiting electrons which "take up space". In the Standard Model of particle physics , matter is not a fundamental concept because the elementary constituents of atoms are quantum entities which do not have an inherent "size" or " volume " in any everyday sense of the word. Due to the exclusion principle and other fundamental interactions , some " point particles " known as fermions quarks , leptons , and many composites and atoms, are effectively forced to keep a distance from other particles under everyday conditions; this creates the property of matter which appears to us as matter taking up space. For much of the history of the natural sciences people have contemplated the exact nature of matter.
Comparing Numbers. Division Basic. Division Long Division. Hundreds Charts. Multiplication Basic.
Mass is a measure of an object's inertia. It is proportional to weight: the more mass an object has, the more weight it has. However, mass is not the same as weight. Weight is a force created by the action of gravity on a substance while mass is a measure of an object's resistance to change in motion. Mass is measured by comparing the substance of interest to a standard kilogram called the International Prototype Kilogram IPK.
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