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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.
REQUIREMENTS Chemicals The following materials are common for the whole batch of students at the Study Centre, since this is a demonstration exercise. Acetone (or ethyl meth
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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
describe the factors which decide the broad area of scientific activity?
What are the major challenges of mining a huge amount of data (e.g., billions of tuples) in comparison with mining a small amount of data (e.g., data set of a few hundred tuple)?
what is meant by this topic?
What is the difference among the geoid and the surface of the earth? The geoid is an visualize surface that equal with the average (mean) sea level around the world. Thus, i
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