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Cement and concrete
Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it hardens. Study its appearance and its properties. Break a piece of cement and study it. Mix the dry cement with about twice as much sand or gravel. This will form concrete. After adding water and mixing thoroughly place it in moulds. Permit these to arden various days. Again study the appearance and the characteristics of these samples.
Paper manufacture: Paper was not used in India until the eleventh century. This Chinese invention of the first .century A.D. reached India mainly through the Ghorian conquerors
You are the mayor of a beautiful city by the ocean, and your city is connected to the mainland by a set of k bridges. Your city manager tells you that it is necessary to come up wi
What is the general statement regarding the temperature of water in oceanic depths? Commonly, the relation is this - the further from the surface the colder the water. This
heavy matter in the world
Simple hydraulic press The principle of the hydraulic press is illustrated by the following model. Half fill a cylindrical jar with water. Pour melted paraffin wax on the su
Explain the Composition and Functions of Gastric Juice In resting condition, the secretion of gastric juice is little in amount and is about 10- 15 ml. After taking each meal,
Neptune The eigth planet, Neptune, was discoveted in 1846 by astronomer Johann Gottfried Galle. We have already told you the story of its discovery in last. It is so f
Describe the factors which decide the broad area of scientific activity?
my research topic is based on water consumption efficiency. I need definitions of the following keywords; efficiency consumption, water use behavior / pattern; water end uses, wat
A floating experiment with different kinds of wood Secure a cork, and pieces of wood like as maple, mahogany and ebony. Place them in a pan of water and notice how every one be
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