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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.
How did Ozone play a big part in the evolution?
how can the theoretical paradigms be used to describe family in Kyrgyzstan?
Tuning in on the Stars: The fact that stars emit radiowaves was discovered accidentally in 1932 by a young engineer Karl Jansky. He was trying to find the source of noise
Cement and concrete Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it harde
SHIFTING LOAD : When a load has to be shifted, you have to take a number of simple steps to prevent back and other muscle strain: 1. If the load is to be manually handled, an
types, principle and working
INTRODUCTION : In any science lab you work with chemicals, gases, electrical equipments, glassware, instruments etc. In case you are working in a biology laboratory handling the p
How do we represent atoms without drawing all the subatomic particles? Atoms can be represented by their chemical symbols. For example, H is hydrogen, He is helium, etc. All t
Fire Barriers : When a fire starts in a building it spreads quickly by: a) Radiation - Intense heat radiates to neighbouring surfaces which are rapidly heated to ignition poi
HOW TO ORGANISE AN INTERACTION SESSION: How should we begin? What are the norms? What is the time slot? Any assessment criteria? These and many such questions may be coming to you
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