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Corrosive Substances : These substances cause severe damage by chemical action when in contact with living tissue or in case of leakage, destroy /damage other materials. Mineral acids like hydrochloric acid and sulphuric acid, sodium hydroxide belong to this class.
Monitoring of resource utilisation Continuous recording of the changes in the quality and quantity of various.resources is as imyortant an element of resource planning as ev
Human factor engineering: With the advances in science and technology, we have to constantly interact with machines and engineering systems. The range is wide, whether it is
feeding modes of insect,reptiles,amphipians,bird,fish and mammals
upright, turn around 180 degrees to face opposite direction Take several steps forward. Reach forward and grasp a door knob Turn a door knob 180 degrees clockwise Sit down in a cha
what are cells
Stellar Parallax If the Earth were stationary, a given line joining point A on the Earth, a nearby star C and any given distant star would never vary. However, if the Earth
To show that liquids exert pressure Connect two 15 cm lengths of glass tubing or two transparent plastic soda straws with a short length of rubber tubing and attach them to an
How soil textural classes categorised and what are is their significance? The soil textural classes are based on the percentage of the separate(s) which contributes maximum to
advantages and disadvantages of proroza
Air pollution by Particulates: Particulates constitute the third category of air pollutants. These are mostly fine carbon particles (less than 0.002 mm in diameter) formed b
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