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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?
How does our body know 'what to do' Feeling, knowing, doing anything depends on special structures called nerves. Neuronal cells in the body act as various messengers according
descibe the factors which decidethe broad area of scientific activity?
what are the four characteristics of respiratory surface
INTRODUCTION : You have studied about the hazards of electricity in Unit 11 of Block 3. You have learnt that most of the electrical accidents like shock, fire, etc. occur often du
The Carbon Cycle: We have seen that carbon is one of the essential elements of all organic substances and it enters the ecosystem through the process of photosynthesis. Carbon is
Define the Levels of Drugs in Urine Levels of alcohol and barbiturates (a group of drugs derived from barbituric acid that is used to sedate, to control convulsions or to induc
characteristics
Explain the Actions of Autonomic Nervous System (ANS) The actions of the autonomic nervous system are largely involuntary (in contrast to those of the somatosensory system). Th
true or false? water conservation efforts have been wholly inaffective
Ingestion : The standard treatment for this type of poisoning is as follows: (1) Tell the casualty to spit out as much of the material as possible and then wash the mouth thoro
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