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How the lungs work
Cut the bottom off a large bottle. Fit a cork to the neck with a Y tube in it. On every of the lower limbs of the Y tie a rubber balloon or a number of small bladder.
Tie a sheet of brown paper or sheet rubber round the bottom of the jar, with a piece of String knotted by a hole and sealed with wax. Pulling this string lowers the diaphragm and air enters the neck of the Y piece causing the balloons to dilate.
Pressing the diaphragm upwards has the opposite effect.
Fibre optics: The songs you hear on your transistor, or the pictures you see on your TV are canied from the studios to your home on radiowaves. Telephone calls you make, on th
Precautions : The following must always be observed while dealing with lasers. 1) Never look along a laser beam or expose any part of your skin to it. Beware of reflected laser
is perkin''s condensation possible in aliphatic aldehyde?
What divides the outer core from the mantle above it? There is a gradual transition caused by a vary in temperature and decreasing pressure..
Why marbles rarely contain fossils
Write an essay to answer the following question: How can social scientists explain human behaviour scientifically?Discuss the merits and limitations of the applications of the sci
Q. Mention the different methods of wheat milling? Three methods of wheat milling are stone milling, roller milling and fragmentation milling.
Reflexes: It is of interest to know, that all sensory information does not have to go to the - brain before we can react to a stimulus. Our responses to certain stimuli
To measure the volume of air in the longs Invert a bottle full of water so that its neck is in the surface of water in ajar. Introduce a glass or rubber tube into the neck and
Define Age Related Changes in Blood Blood: Here the haemopoiesis (the formation of blood cells) slows down. Fatty marrows replace the heamopoietic (red) marrow. Thus, the proli
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