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Ultraviolet Radiations : The ultraviolet (UV) light has higher energy than visible light. Hydrogen lamps, deuterium lamps and other sources of ultra-violet are used for a variety of purposes in physical, chemical and biological laboratories. These applications include spectroscopy. The sterilisation of instruments, the initiation of chemical reactions and the detection of purines and other substances which fluoresce when irradiated with UV light in chromatography and other separation techniques. Ultraviolet sources may be recognised by their intense pale blue illumination, for example mercury vapour lamps and high voltage sparks and arc emitted at the time of welding.
What time period can carbon-14 dates have? Carbon 14 has a half-life of 5,730 years, and thus it can be used to date very precisely a large majority of things, particularly woo
Water Resources: Water, as you know, is the most essential component of life. Our water resources are limited, though apparently, water is available in an abundant quantity.
FIRST AID PROCEDURE FOR ELECTRIC SHOCK : Although the procedure described is usually followed, there are occasions when other matters have to be considered and therefore the proce
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Explain the Formation of sedimentary rocks? Lithification refers to the processes by which loose sediments are consolidated into new rock material. One of the most common forms
State the categories of bulky organic manures These are evaluated mainly on the basis of their nitrogen content and the amount of organic matter present in them. The two import
Describe the factors which decide the broad area of Scientific activity?
Technical innovations and Inventions: Medieval India witnessed considerable improvement and changes in the field of technology. While these changes were largely a result of
Explain Extrasystole and Compensatory Pause During the relaxation period, cardiac muscle is in the relative refractory period i.e. sleeping but only just. If a sufficiently st
1.) Imagine that you are a particle inside an ice cube. You were placed into a glass of lemonade to cool it down. The lemonade has now been drunk and you have been left in the glas
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