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Astrophysics - the arena where all cosmic events unfold

Seven Base Units (SI Units):  second (s) ampere (A) meter (m) kelvin (K) kilogram (kg) mole (mol) candela (cd) In science, properties refer to the characteristics that can be used to describe and identify a material or substance. These characteristics can be observed, measured, or tested. Properties help differentiate one material from another and can be either physical or chemical.  Physical properties are characteristics that can be observed or measured without changing the substance's chemical composition. Examples include:  Color : The visible hue of the substance. Texture : The surface quality of the substance (e.g., rough, smooth). Shape : The three-dimensional form of the substance. Density : The mass per unit volume. Hardness : The resistance to scratching or indentation. Melting point : The temperature at which a substance changes from solid to liquid. Boiling point : The temperature at which a substance changes from liquid to gas. Chemical properties describe ho...
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GoI

Great minds discuss ideas; average minds discuss events; small minds discuss people. “Men and women range themselves into three classes or orders of intelligence; you can tell the lowest class by their habit of always talking about persons; the next by the fact that their habit is always to converse about things; the highest by their preference for the discussion of ideas.” 1902: To enforce standardization and co-ordination between various railway systems in British India, the Indian Railway Conference Association (IRCA) was set up in 1902. It was followed by the establishment of the Central Standards Office (CSO) in 1930, for preparation of designs, standards and specifications. However, till India's independence in 1947, most of the designs and manufacture of railway equipment was entrusted to foreign consultants. After independence, a new organisation called Railway Testing and Research Centre (RTRC) was set up in 1952 at Lucknow, for undertaking the intensive investigation of r...
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