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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.
Water-mill in Golden era: The water-mills were also invented in the classical period. But they came to be widely used only in the Middle Ages. The wind-mills and water-mills
In recent years research have shown that women's two potentially critical cues are shape and weight. Generally, the shape in women a female physical attractiveness judgements are
what is the weigt on earth of an object that has a mass of 22 kg?
Diagnosis: 1. Diagnosis of the casualty involves considering the history, symptoms and signs. 2. History is the information as to how the accident or illness occurred.
QUESTION 1 (a) What is the main objective of the Occupational Safety and health Act 2005? (b) State 6 other objectives. Briefly describe them. QUESTION 2 (a) What cr
Explain Antibodies Antibodies (also referred to as immunoglobulins and garnmaglobulins) are produced by plasma cells. They are Y-shaped proteins that each respond to a specific
What is Immunity? Amino acids are involved in giving immunity by maintaining the vulnerable surfaces of the body in such a way so as to resist infections. Most of the external
how many known plam nets are in our solar system
Soil particle distribution The grouping of soil particle distribution into different groups has been done, though arbitrarily, each group represents a range. The limit does no
how is metal tyre fitted onthe wheel of bullock cart
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