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Rockets or Launch Vehicles:
Every flight into space begins with a rocket launching. The rocket can lift a satellite or spaceship carrying human beings and equipment into space. Therefore, it is also called launch vehicle. The rocket has been known to mankind for centuries. Rockets used as firecrackers are a common sight on festive occasions in our country. But the rockets that launch space whicles use highly advanced technology, and, of course, they are far more
When the fuel in the rocket is set tofire, a stream of hot gases is expelled at a high speed from its rear end (Fig). As ireaction to the thrust of the,gases, the rocket moves in the opposite direction. As long as the fuel in the rocket burns, shooting out gases, the rocket continues to accelerate forward, and acquires great speed. No single rocket fired from the earth can attain in one go the high speeneeded to orbit the earth, or to escape its pull. Higher speeds are reached by using big and small rockets, in stages. in the launch vehicle. As the large rocket soars into space and uses up its fuel, lt IS separated from the smaller rocket and drops off. The smaller rocket already going at high speed is then fired to accelerate it to an even higher speed. Three-stage rockets are usually able to achieve speeds suitable for most purposes in space (Fig). The final stage of the launch vehicle carries the payload. Activity Verify the principle of rocket motion by releasing an inflated balloon with its neck open. The different kinds of payloads that rockets carry into space include artificial satellites and space probes to nearby heavenly bodies. The satellites and probes themselves carry communication and research Quipment.
DISPOSAL OF MICROBIAL CULTURES: After the study is finished microbial cultures should not be left in the laboratory or taken out of the laboratory alive because availability of th
To show the differences in soil particles Secure some glass jars that hold about half Gallon or two litres of water. Place various handfuls of soil in a jar. Fill the jar with
Hydrophobicity of Amino Acids Hydrophobicity of amino acids and also of peptides and proteins may be determined by relative solubility of amino acid in water and in a less
Rancidity:- Formation of aldehyde due to oxidation of unsaturated glycerides.
methods of heat transfer
Model water wheels A meat skewer or a knitting needle can be used as an axle. An old typewriter ribbon- spool or a sticking plaster reel is useful as a basis for these improvis
Soil Texture and Methods of Analysis Soil texture is the basic property of a soil related to the size of individual mineral particles, which cannot be easily altered. It spe
Functions of communication: Broldly the main role of communication in a social system is : Receiving and conveying.information which may be facts, messages or opnions; this
can you explain to me the mohs hardness scale ?
Food allergies: Food allergies are different from food fads. Certain fds seem to have strange reactions on some people. Probably, you have come across a person who got skin ra
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