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Drinking straw hydrometer
Procure a drinking straw or a stout natural straw about 20 cm long. If it is not 'water-proof' dip it in melted candle wax and permit it to dry. Seal one end with wax, and introduce some lead shot or fine sand unless it floats in a vertical position. Then drop in melted wax to keep the shots or sand in place. Have a thin rubber band or a piece of black cotton tied round the stem so that it can be slid up and down as a marker.
Q. What is the major source of fresh water in the city/town/village where you live? Answer : River is a major source of fresh water.
Floating in different liquids Obtain a tall, slender glass jar, test tube or bottle, and the following liquids: mercury, carbon tetrachloride, water and kerosene. You will also
how so you find the numerical age and can you provide an example?
Objectives After completing this exercise you will be able to: 1. Sterilize and dispose off microbial cultures, 2. Dispose off the carcass of laboratory animals and the e
Question 1 What is a balanced diet? How food exchanged list help in planning a balanced diet? Question 2 What are the clinical forms of vitamin A deficiency and explain any o
what are alveoli?
OBELIA IS CONSIDERED TO BE OF SPECIAL INTEREST IN ZOOLOGY AND AS AN ANIMAL SHOWING AN INTERMEDIATE GRADE OF ORGANISATION
Physico-chemical properties of vitamin E are as follows: a) Tocopherols are yellow, oily liquids. b) They are freely soluble in fat solvents. c) The compounds are
FIRST AID TREATMENT OF LOCALIZED INJURIES : So far, we have seen main life-saving functions of first aid. Let us discuss the task of controlling some other injuries so that they d
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
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