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Making a 'gusher' with compressed air
Secure a large narrow-necked bottle like as is used for soda water. Place a single-hole stopper in the bottle. By the stopper put a 10- cm length of glass tube which has been drawn to a jet on the outside end. With a short length of rubber tube join a length of glass tube that will extend nearly to the bottom of the bottle. Fill the bottle about half full of water. Insert the stopper firmly and hold it in with your fingers. Next blow hard into the bottle; and when you free the pressure, point the bottle away from you. What happens?
What is happening to the length of a day on the Earth, as a result of the gravitational pull of the Moon?
Military Technology: Important changes were introduced in military technology. Rope and wooden stimps for horsemen were known in India before the thirteenth century. However,
Which is primarily involved in the movement of a glacier: gravity
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
Illustrating an eclipse of the sun Hold a small coin a few inches from one eye and close the other eye while looking at the lighted electric bulb on the ceiling of a room. The
Explain how the uterus supports the development of a baby during gestation.
information about the eyes
what are compartments of carbon?
Q. List any three human activities which would lead to an increase in the carbon dioxide content of air (i) Burning of fuels in various processes like heating, cooking, transpor
Niacin (vitamin B3) Though niacin or nicotinic acid has been known to the organic chemists since 1867 and Funk isolated it from yeast and rice polishing in order to identif
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