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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.
Explain the Dichromates or Mild Colour Blindness A dichromate individual possesses only two cone pigments. Lack of the red pigment, called protanopia, makes distinguishing of t
Some Features of the Forests: Forests are the most widespread stretches of vegetation, harbouring diverse kinds of life forms. They are dominated by trees. Besides trees, f
Emergence of Urban Societies: The writings of this period also give us a picture of the social conditions. The social structure was undergoing radical changes at this time,
To show that expired air contains carbon dioxide The two flasks are linked so that when you breathe by the T piece, all the air bubbles by the lime water in the flasks. One tub
Which is primarily involved in the movement of a glacier: gravity
Moisture from breathing Moisture coming from breathing might be shown by blowing on a cool mirror or into a cool glass or bottle.
ACCIDENT REPORTING To start with, let us explain two closely related words, accident and incident. Accident is an unexpected or unplanned event. It may cause i) Harm to s
A weather picture A piece of white blotting paper is immersed in a solution having two parts cobalt chloride to one part common salt. While wet the paper will stay pink, but wh
what is force
1. (a)what is plane table traversing (b)with illustration ,elaborate how you would map an area using the technique
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