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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.
if a force of 26 n is exerted on two baLLS one with a mass of 0.52kg ands the other with mass of 0.78kg which ball will have the greater acceleration explain
Chemical Evolution The question of how life came into being in the first place still remained unanswered. To find an answer to this question means looking back billions of y
What is the difference between a a characteristic and a property?
what is meant by three phase signal..
How to prevent the erosion of topsoil Use the trays constructed for the experience above. (a) Fill the trays with loose soil and tilt everyone the similar amount. Make furr
EXTINGUISHING A FIRE : The techniques and equipment which you will learn about in this section relate to the standard kinds of fire fighting equipment found in buildings open to t
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
The Expanding Universe: Hubble's observations had proved the existence of galaxies. After mapping as many galaxies as could be seen by the telescopes then'available, he tu
INTRODUCTION : In this unit, we shall discuss the need and the method for reporting an accident. We shall explain the choice of locating the first aid box and state its contents.
Important physico-chemical properties of niacin and niacinamide are as follows: a) Niacin is a white crystalline solid. b) While niacin is sparingly soluble in water, etha
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