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Making a simple reflecting telescope
A simple reflecting telescope can be made from a concave mirror obtained from a shaving mirror. The mirror is arranged wooden box of suitable size in such a way that it can be tilted at dissimilar angles. An upright made of wood is attached to the box so that its angle may also be varied. Two short focus lenses are fixed in corks which are then placed in a short length of mailing tube as an eye-piece. Then join this eye- piece attached to the wood upright exactly at the focal
Military Technology: Important changes were introduced in military technology. Rope and wooden stimps for horsemen were known in India before the thirteenth century. However,
NEED FOR SAFETY AND HEALTH REGULATIONS : Accidents in work place are caused by negligence at some level. Legal control is required when individuals and organisations fail to reali
PROCEDURE Locate the gas cylinders available in the lab. Note the colour of the cylinder (to a maximum of two and exclude the LPG) and bands on it (if any) and record them i
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
The methods of food processing by covering the two major methods- thermal processing dehydration. Food processing methods which include freezing, microwave proces
Explain the Inulin Clearance Test Inulin is a complex polysaccharide found in specific plant roots. In the test, a fixed amount of inulin is infused into the blood at a constan
Enzyme inactivation The disappearance of activity of an enzyme (in vivo or in vitro due to presence of inhibitor molecules or inhibitory condition(changes in pH, temperature,
Discovery of Microbes The discovery of microbes and the fact that they cause infectious diseases is one of the greatadvances in science, which has helped us in understanding
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
Procedure 1. Soak the emptied glassware in disinfectant or liquid soap solution overnight. If you use disinfectant, dip the glassware in soap solution before washing, Rub clean
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