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Use of Fire Extinguishers : We know that one type of fire extinguisher cannot serve the purpose on all kinds of fire. In this subsection you will study about the use of different types of fire extinguishers, fire buckets and fire blankets. How would you use a foam extinguisher, for instance? Would you just point it at a fire and force a jet of the extinguishing agent? Would you do the same with a water extinguisher or a carbon dioxide extinguisher?
There's no simple answer to any of these questions, but there is a technique to be learnt for each type of extinguisher. In the same way that you would use certain kinds of fire extinguisher for certain kinds of fire, you would use an appropriate technique for each kind of fire extinguisher. To do otherwise would be wasting valuable resources, probably at a time when these resources are most needed. The difference between knowing what fire extinguisher to use and how to use it, and not knowing this information could be the difference between life and death for someone. However, remember that fire extinguishers are usually suitable only for small fires.
Question: a) How does temperature changes in the stratosphere? Give a physical explanation and illustrate your answer using a diagram. b) Write a short note on ozone in the
Q. Mention the different methods of wheat milling? Three methods of wheat milling are stone milling, roller milling and fragmentation milling.
Introduction : In any laboratory dealing with biological experiments, hazards can occur mainly due to chemicals and biological materials. In the previous exercise you have done th
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.
Determine about the Physico-chemical parameters The possible combination of various elements found in the earth's crust gives rise to a large number of minerals. Out of all the
Optics: The prevalence of eye diseases in the desert and tropical countries led to the study of the eye by Arab doctors. Surgical treatment of the eye led to renewed interest
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HYGIENE : We all would agree that chemical hazards can be prevented to a certain extent by maintaining a good hygiene. Hygiene in this context can be discussed in the following th
Healing Touch of Lasers: Contrast the above application of lasers with their uses in medicine where the laser is working wonders. A laser can be applied with almost perfect
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