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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
Archaeological Evidence: The study of human antiquities, especially of prehistoric period is known as archaeology. The biological and cultural evolution of man proceeded side
What might affect a spreadsheet developer’s choice for the date format used to display the date.
Big Bang theory: The most important current theory for the origin of the universe is the Big Bang theory.According to this theory, the universe started with'a huge explosi
Moisture comes from home plants Place a cellophane bag over a leaf of some house plant or garden plant and close the end about the stem with a rubber band. Make an observation
Apart from acidic waste, bromine waste is also treated using this method. Exercises Examples: Perchloric acid, sulphuric acid, hydrochloric acid, nitric acid, phosphoric acid
how can a person breathe
Define Fats - Nutritional Components Once the body stops eating, it begins to live on its fat. Fat storing depots 'adipocytes' are located in the different parts of the body. I
How did it change from Mendeleev to Mosely?
Lifting things with compressed air Remove the bladder from a soccer ball or basket ball and place it on a table. Pile some books on the bladder and then blow into it.
Developments in Medicine: During the early Vedic period, healing was thought to be the duty of the priests. Diseases were seen as the results of God's wrath for sins committed
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