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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.
Softening hard water by boiling Temporary hardness can be removed from water by boiling. Shake a little temporary hard water with a few drops of soap solution and see if you c
What are the properties of a cell?
geography without description does not exist. discuss
WHAT IS THE OCEAN''S COASTLINE''S LIVING AND NON-LIVING THINGS?
Explain the Oxygen toxicity - Histotoxic Hypoxia Exposure to oxygen at increased pressure can produce a marked increase in the dissolved oxygen in blood. It produces toxic effe
A lamp chimney lift pump Use a straight-sided lamp chimney as a pump cylinder. Fit a two-hole stopper into the chimney for a piston. If the stopper is a little small wrap some
how can a person breathe
Which is primarily involved in the movement of a glacier: gravity
The Carbon Cycle: We have seen that carbon is one of the essential elements of all organic substances and it enters the ecosystem through the process of photosynthesis. Carbon is
Apart from acidic waste, bromine waste is also treated using this method. Exercises Examples: Perchloric acid, sulphuric acid, hydrochloric acid, nitric acid, phosphoric acid
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