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To feel the 'spring' of air Secure a bicycle pump and place your thumb over the finish of the outlet tube. Next push the piston in forcibly and rapidly let go of it. What happe
What is metre?
CHEMICAL EFFECTS OF AIR Wash a small wad of steel wool in gasoline, benzene or carbon tetrachloride (car- bona) to delete any grease. Squeeze it out and then fluff it. As soon
Making a simple reflecting telescope A simple reflecting telescope can be made from a concave mirror obtained from a shaving mirror. The mirror is arranged wooden box of suitabl
Explain Mucous membranes - External Defence Mechanism Mucous membranes: The digestive, urinary, genital and respiratory tracts open out at one or both ends. They do not have a
Floating in different liquids Obtain a tall, slender glass jar, test tube or bottle, and the following liquids: mercury, carbon tetrachloride, water and kerosene. You will also
two forces of magnitude 6 N and 4 N act on a 3.2 kg. body. What is the acceleration produced when these force are acting in the same direction? What it the acceleration produced wh
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
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
Sterilizing water by boiling The presence of tiny living plants and animals makes water inappropriate for drinking. Such forms of life can only be seen by a microscope. We can
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