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A compressed air pop-gun
Use a straight piece of glass or plastic tubing of 1 or 2 cm in diameter and 15 or 20 cm in length. Make a piston by twisting some string on a pencil till it fits strongly in the tube. Put a small cork in the finish of the tube and push the piston in quickly
TO SHOW THAT AIR HAS WEIGHT Drive a thin nail by the exact centre of a long rod such as a metre stick or a yard stick. Balance the stick by resting the nail on the rims of two
Explain Internal Respiration What do you understand by the term 'internal respiration'? Well, the interchange of gases between the blood and cells of the body is internal respi
research on Synchronouns sequential logic
Why is there more exchangeable calcium than potassium on clay/humus colloid? Calcium is usually abundant except in acid soils which occur in humid area due to excessive leaching.
Explain Macrophages They are large, long living effective phagocytes, which enlarge out of monocytes. It is an irregular cell about 25-50 mm in size. It has a large ovoid nucle
what is sorter''s disease
An experiment with a loop of thread Rinse a dinner plate methodically and then fill it with water. Make a loop with thread, open it a little and float it on the water. Touch th
QUESTION 1 (a) What is the main objective of the Occupational Safety and health Act 2005? (b) State 6 other objectives. Briefly describe them. QUESTION 2 (a) What cr
Air Borne Diseases: A number of diseases are caused due to bacteria and virus that are carried in the air. When an infected person sneezes or coughs, there is a noticeable spr
Nuclear Reactor: Nuclear fission can be maintaned as a controlled cjiain reaction in a nuclear reactor to produce energy. Fermi had found from experiment that slower moving
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