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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.
physical and chemical properties
Due Date: May 15, 2016 23:59:59 Max Points: 150 Details: Prepare a critical analysis of a qualitative study focusing on the problem statement, study purpose, research questi
Explain the property of Water Water has a significant property called surface tension that markedly influences its behaviour in soils and may be measured by level of water rise
Semiconductor Devices and their Uses: If a junction is formed between a p-type and an n-type'semiconductor, the device called a p- n junction diode acquires a peculiar pppen
Surfaces of colloidal fractions of clay minerals The surfaces of colloidal fractions of clay minerals and humus are responsible for the cation and anion exchanges between soil
Media and Educational Environment: Some recent technological developments in media, have opened up new horizons. Besides, increasing use of media, to support and expand educa
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.
Procuring and storing animal materials (i) You can begin by asking for a clarification or reaching a common understanding regarding the oft-used terminology, for instance, anim
who is the first scientist
why do we breathe?
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