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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
ecological characteristics of deserts
A weather picture A piece of white blotting paper is immersed in a solution having two parts cobalt chloride to one part common salt. While wet the paper will stay pink, but wh
Explain Role of the Mucous in Body Systems and Organs - The gastrointestinal tract: The microbes which enter through the mouth are caught in the mucous and eliminated with sput
hardness of substances?
Explain General Structural Plan of the Gastrointestinal Tract The wall of the gastrointestinal tract consists of four layers of tissue. These are: Adventitia or outer co
explain the process of respiration in human beings
Observing the phases of the moon Over the time of a lunar month have the children make nightly observations and illustrate drawings of the moon. Start at new moon and continue
Determine the Hormone Secreted From the Parathyroid Gland The parathyroid gland secretes parathormone. The amount secreted is strongly influenced by the level of calcium in the
Define Minerals - Calcium, Phosphorous and Iron? Minerals are inorganic substances. This means they are not formed by living matter and contain no carbon. Minerals used in the
Explain the Dyspnoea Shortness of breath or dyspnoea is a feeling of difficult or labored breathing that is out of proportion to the patient's level of physical activity. In ot
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