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How to make a simple vacuum pump
Secure a bicycle or automobile hand pump. Open the pump and delete the piston. Un- screws the bolt that holds the leather washers. Reverse the washers by turning them over. Change the washers on the piston and insert in the pump cylinder. A pump of this sort will serve to do a lot of simple vacuum experiments
Explain Organs of the Respiratory System The respiratory system consists of various organs. They form a clear pathway for the air to enter and leave the lungs. The body needs a
Define Hyposecretion of Insulin You may already be aware that an insufficiency of insulin in the body leads to the development of diabetes mellitus. It is caused by the degener
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why- 1) alcoholic acidity is determined? 2) ash content is important factor in wheat flour? 3)carbohydrates and sugar are separately denoted on pachaging material?
Disposal of Chemical Wastes : We shall deal with some commonly occurring chemical wastes. If you need to know more details covering the disposal of a wide range of chemicals, you
INTRODUCTION : Gas, Electricity and water are integral parts of any science laboratory. You would have realised from personal experience (if any) and in the course of your study o
Question 1 What is a balanced diet? How food exchanged list help in planning a balanced diet? Question 2 What are the clinical forms of vitamin A deficiency and explain any o
Cement and concrete Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it harde
Define Haemorrhagic or Blood Loss Anaemia The body replaces plasma within 1-3 days after a haemorrhage, but this leaves a low concentration of red blood cells. In chronic bloo
Explain Sneezing Reflex Actions - Respiratory Process This reflex is an involuntary, sudden, violent and audible expulsion of air through the mouth and nose. Usually irritation
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