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Measuring atmospheric pressure with a bicycle pump
A bicycle pump with the washer reversed as represents can be used to calculate atmospheric pres- sure. The piston can be made airtight by adding a little thick oil to the barrel. The area of cross section of the pump barrel can be measured or calculated with squared paper. The pressure of the air can then be measured in kg / cm2
Opening the Airway If a casualty has stopped breathing, first of all we should clear the airway of the victim, so that he/she could inhale fresh air. The procedure is as follow
Fire Alarms : Most modern fire alarm systems are electric and can be activated from several points throughout a building. These points usually consist of glass-covered switches wh
Chemistry in golden era: Chemistry In the field of metallurgy too we notice some remarkable developmenk. Before the close of the sixteenth century, zinc was isolated by a pr
What is hydrolysis Fats when boiled with water at 220°C under pressure in an autoclave, undergo hydrolysis to first form a diglyceride and then ultimately glycerol an
How do day and night occur?
Iron Age: We briefly surveyed the ideas and techniques of the early human beings, and traced the roots of science in the primitive culture. You also read about the emergence
Explain the Adrenal Medulla The adrenal medulla secretes epinephrine or adrenaline and norepinephrine or noradrenaline. The secretory cells of the medulla are modified postgang
What is asthenospher? Ans) The asthenosphere is a layer of the earth crust.
Flammable Liquids : Bulk supplies of all flammable liquids should be kept in a solvent store well away from main buildings. The store should be securely locked and fire warning no
Explain the Complement System To remove a microorganism by phagocytosis requires phagocytes at the right place in the right time. The organism should adhere to the phagocyte. M
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