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Holding water in a sieve
Pour some oil over the wire mesh of a kitchen sieve and shake out the overload so that the holes are open. Cautiously pour water into the sieve from a pitcher, letting the water run down the side of the sieve. When the sieve is about half full, hold it over a sink or pail and observes the bottom. You will see the water pushing by the openings but the surface tension keeps it from running by. Touch the bottom of the sieve with your finger and the water should run by.
Air pollution by Particulates: Particulates constitute the third category of air pollutants. These are mostly fine carbon particles (less than 0.002 mm in diameter) formed b
Explain the Digestion of Food Salivary amylase or ptyalin acts on cooked starches (polysaccharides) and changes them into maltose as shown herewith. Boiled starch → soluble
Explain the Igneous rocks form? Igneous rocks form from the crystallization of magma. There are two main kinds of igneous rocks: intrusive and extrusive Molten rock within t
Substances Used In Measuring Extracellular Fluid Volume Substances used in measuring Extracellular Fluid Volume - The Concept of "Fluid Space" Substances that have been used
Driving a boat by surface tension Secure some gum camphor at the drug shop. Cut two or three boats from stiff paper, every about 2.5 cm in length. Cut a notch in the stern larg
QUESTION 1 ‘First Impression is the last impression.' Discuss this very often heard quote referring to the theory of Solomon Asch. Support your answer with examples from your o
Systems view of life: Evolution has given rise to various types of life forms from single celled bacteria to organisms as complex as a human being. It may interest you to know
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Making a housing box for weather instruments Some of your weather instruments must be uncovered to the weather. Between these are the wind vane, the wind speed indicator and th
which organs are protected by the skull
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