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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
What are the heat sources in the earth?
Intrusion into the Water Cycle: Water management is one of the leading concerns of man today. The natural water cycle has not been able to compensate for the effects of human
Explain how Insulin Secretion Regulated It is interesting to note that blood sugar level itself controls insulin secretion. How? When blood sugar level rises, insulin secretion
Corrosive Substances : These substances cause severe damage by chemical action when in contact with living tissue or in case of leakage, destroy /damage other materials. Mineral a
What is the earth crust made of? Ans) The overall composition of the Earth crust is as follows: Silicon 27.7% Oxygen 46.6% Iron 5.0% Aluminum 8.1% All other elem
The important physico-chemical properties of thiamin are as follows: a) Thiamin hydrochloride is a white, needle-shaped crystalline substance. b) It has a characteristic sm
Question 1. Explain the routes of administration of drugs 2. List 4 antimuscarinic drugs and mention their uses 3. Explain the role of bronchodilators in the treatment of
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
Lifting water with air pressure Fit a test tube with a single-hole cork and glass tube. Drive out the air by boiling a little water in it. Invert it with the open end under the
How different pressures of air force water from a container Fit a test tube with a two-hole stopper. By one hole place a length of glass tube which extends into the test tube a
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