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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.
The diagram below shows a baffled tank with a six blade turbine agitator: FIGURE 1 (a) Is a side view (b) Is a bottom view (c) Gives dimensions of the tu
A rock weighs 33.6 N on Planet X and 49 N on Earth. What is g on Planet X?
In the following table state how gymnosperms are adapted for living on land with respects to each of the following aspects Aspect Adaptation for living on land Alternation of Gener
Freezing by Contact with a Cooled Solid-Plate Freezing In this method, the product is sandwiched between metal plates and pressure is usually applied for good contact. Plate
State of Communication in the Past: Those of us who have experience of life in remote villages, far away from urban centres, are familiar with such features as poor roads whi
What is the function of the pharynx of a planarian?
Explain the Hormones from the Islets of Langerhans The cells which make up the Islets of Langerhans are found in clusters, distributed throughout the substance of the pancreas.
Media and Scientific Outlook in Culture: Apart from sharing of deeper values through history and continuous interaction, the contribution made by all sections of the people i
Using what you know about the energy—matter relationship, explain why the ecosystems with the greater amount of overall energy tend to have a greater number of organisms.
If two relations R and S are joined, then the non matching tuples of both R and S are ignored in
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