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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 do the currents produced by a 1.5V flashlight cell and a 12 V car battery compare if the resistance is the same?
Determine how ion exchange data is helpful The ion exchange data is helpful · in soil management, · indicating nutrient storage capacity of soil, · prediction of s
what is light energy
Night Sky: When you look up at the sky on a clear night, what do you-see? Most of it is dotted with twinkling stars. You may see the moon or Venus as a bright point or Mars as
Name of the metamorphic rock: gneiss
Pollution Now-a-days, you might have heard every one talking about pollution. What does pollution mean? Pollution is the addition to the environment (air, water, soil) of subst
Where friction is desirable and undesirable at the same time.
father of environmental microbiology
What is a hormone? A hormone, as you may already know, can be described as a chemical substance which having been formed in one particular organ or a gland is carried in the bl
does giraffes have short necks?
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