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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
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
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
Water Pollution Pollution of fresh water is one of the most serious environmental problems of the world as a whole. In our country most of the rivers and lakes are polluted
Biological evolution We can presume that biological evolution began with the formation of the first true cells. These must have been forms that did not require free oxygen
How to become a geology tutor
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
saan nakuha ang salitang tubig?
Explain Agglutination - Detection of Antigen-Antibody Interaction Agglutination - If Ag is present on the surface of cells, or can be made to coat these surfaces of cells, thes
Experiments with man in space: We have already discussed the usefulness of space flights in Blocks 3&4. One is able to make astronomical observations from satellites; get met
Explain Bile - External Defence Mechanism It is an alkaline secretion of the liver, which checks the growth of foreign bacteria on the partially digested food.
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