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A hair hygrometer
This device will enable you to read the relative humidity directly without the use of tables.
Procure a few human hairs about 30 cm long. Free them from grease with dilute caustic soda solution. Fix one to the upper end of a stand and stretch it with a 50 gm weight. The hair should pass two or three times round a spool fixed to an axle which is free to turn in bearings made from a piece of tin and fastened two-thirds of the way down the stand. Fix a Light pointer of balsa wood to the axle, and organize a postcard to act as a scale. For greatest sensitivity the diameter of the spool should be small
Explain why earthworms are said to be the most important soil animals. Earthworms ingest organic matter as well as soil where they mix, granulate and excrete to increase stabil
Role of Bile in Digestion Bile is produced by liver and stored in gall bladder. During digestion, the gall bladder contracts and supplies bile, rapidly to the duodenum throu
which is longset cell in human body
INTRODUCTION : You read about the fire hazards, general precautions and remedial measures in case of an outbreak of fire in the previous unit. In this unit you will learn about t
Explain the Pancreas The pancreas is a gland that lies immediately below the stomach, surrounded by the loop of duodenum. The bulk of the pancreas is composed of pancreatic exo
How do you draw topographic maps?
Fits : Fits of various kinds may be accompanied by unconsciousness, and are usually characterized by the casualty being unaware of his/her reactions. You should remember the follo
Define Whole blood – Components of Blood This is rarely employed these days, only really in instances of severe blood loss. In place of it’s almost all time separated into its
Code of Practice in a Laboratory The following is a set of rules you should follow while working in a laboratory: 1. Always wear the required protective clothing. 2. Make
Fission, and fusion energy: 'The Italian navigator has arrived in the new world' This coded message announced the beginning of the atoyic age on 2nd December? 1942. The 'n
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