Properties of teflon

Properties of teflon Polytetrafluoroethylene or PTFE (more commonly known as Teflon) is a particularly versatile ivory-white and opaque plastic fluoropolymer; it is made by the free-radical polymerisation of many tetrafluoroethene molecules, and is suitable for a wide range of applications in industries as diverse as aerospace, the food and drink industry, pharmaceuticals and telecoms. Produced by … Read more

Properties of polyvinyl chloride

Properties of polyvinyl chloride What is Polyvinyl Chloride (PVC), and What is it Used For? Polyvinyl Chloride (PVC) is one of the most commonly used thermoplastic polymers in the world (next to only a few more widely used plastics like PET and PP). It is a naturally white and very brittle (prior to the additions of plasticizers) plastic. PVC has been around longer … Read more

Corossion of metals

Corrosion is defined as an attack on a material as a result of chemical, frequently electrochemical reaction, with the surrounding medium. According to this definition, the term corrosion can be applied to all materials, including non-metals. But in practice, the word corrosion is mainly used in conjunction with metallic materials. Why do metals corrode? Apart … Read more

Exothermic and endothermic reactions

Endothermic Reactions Endothermic reactions are those chemical reactions where energy is absorbed by the system from the surroundings mostly in the form of heat. The concept is applied in the physical sciences like chemical reactions where hear is converted to chemical bond energy by way of experiments. Common examples of endothermic reactions are cooking an … Read more

Urban spheres of influence and rural urban fringe

Urban spheres of influence and rural urban fringe Urban spheres of influence Urban spheres of influence reflect centre-to-hinterland relationship, compared with the non-central region, the centre assumes more complex economic functions, and provides more economic activities. Famous theoretical contributions to this research field are the Central Place Theory (Christaller, 1933), the extension to the Central … Read more

Quality of life, life expectancy, literacy, standard of living and migration in India

Quality of life, life expectancy, literacy, standard of living and migration in India Human development—a comprehensive approach Human development is a process of enlarging people’s choices. But human development is also the objective, so it is both a process and an outcome. Human development implies that people must influence the processes that shape their lives. … Read more

Good Governance

The “key word” to be used in this is the “Good Governance” in the various phases of the service definition, development, refining and monitoring, and the whole concept of Good Governance services is based on “putting the citizen (user) at the centre of innovative services” starting from enabling of a specific procedure: citizens shall be … Read more

04.10.17 Uttarakhand (UKPCS) Current Affairs

UTTARAKHAND   Now, an app for rainwater harvest queries   People interested in installing rainwater harvesting plants in their homes would soon be able to do so with a smart phone app. The Uttar Pradesh groundwater department will soon launch an Android-based mobile application which will enable people to easily install rainwater harvesting plants. The app will also … Read more

Training and Development

Training and Development: the employees to improve their knowledge and skill so as to be able to perform their tasks more efficiently is known as training. It is an organised activity for increasing the knowledge and skills of people for a specific purpose. The term ‘development ‘refers to the process of not only building up … Read more

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