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Nonionising Radiations : As stated earlier the radiation hazards are not limited to ionising radiations from radioactive materials. There are a number of other radiation sources in the laboratories which are potentially hazardous.
Explain Light source - Pre-requisites of Colour Perception No colour may be detected by the eyes or by an instrument in the dark i.e. in the absence of a light source emitti
Why do organisms need water? Organisms need water for the following reasons: (i) All cellular processes need water as a medium. Usually, the reactions that take place in our
What is the difference among the geoid and the surface of the earth? The geoid is an visualize surface that equal with the average (mean) sea level around the world. Thus, i
What is ablation? Ans) Ablation is a technological term for the loss of snow and ice from a glacier. The process happens by a combination of the two physical processes, meltin
Microbes: You should know that invisible microbes are present everywhere, because they can surviveeven under very inhospitable conditions. They are all around us, in the air
Precautions : The following precautions should be taken while using UV lamps: 1) TJV lamps must always be properly shielded. 2)Wear approved goggles when working with or clo
Objectives : After studying this unit, you should be able to: 1. List the obligations of the teachers and the Head of the institution towards 2. Safe working conditions
To show which types of soil hold water best Tie cloth over the end of various lamp chimneys and then fill every one to within 8 cm of the top with dissimilar types of soil. Use
Biological evolution We can presume that biological evolution began with the formation of the first true cells. These must have been forms that did not require free oxygen
If more of substance b dissolves b has a higher what than substance a
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