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TO SHOW THAT AIR HAS WEIGHT Drive a thin nail by the exact centre of a long rod such as a metre stick or a yard stick. Balance the stick by resting the nail on the rims of two
Deductive logic: Deductive logic may be considered as the opposite of induction. Here the reasoning is more direct. If we know a statement about a whole class of objects, ph
a. How many ion pairs are produced in 1 cm 3 of air during an exposure of 100 mR? The density of air at STP is ρ = 1:293kg m -3 . What is the absorded dose to air? b. An thin w
Explain Internal Defence Mechanism Body's internal defence mechanism is carried out by white blood corpuscles (WBCs), macrophages, inflammatory reactions, fever, interferons, c
For all other wastes i) Burial The spillage could be buried using any of the following methods: The spillage could be mixed with sand and buried deep. Examples: Iodine
descibe the factors which decidethe broad area of scientific activity?
Explain the term Liming - Decreasing Soil Acidity Acid soils can be managed in two ways, viz. either by growing crops suitable for particular soil pH or by treating the soils w
1. Define the cell theory. 2. Contrast the light microscope with the transmission electron microscope. 3. Describe the structure and function of the plasma membrane, chro
Fire Buckets : All labs should be equipped with a fire bucket. The buckets are not used only for carrying water to a fire. This is one of their uses. The other way a fire bucket i
Natural resources: Resources, or the wealth nature has bestowed on us are essential for civilised living, and therefore, they have to be wisely used. However, it is believed th
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