The New Book of KnowledgeGrolier, 1986 - 21 pages An illustrated encyclopedia containing over 9,000 articles on history, literature, art and music, geography, myths and legends, mathematics, science, hobbies, holidays and festivals, games, sports, crafts, medicine, law, government, industry, politics, and other topics. |
From inside the book
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Page 39
... airplane exposed to the air are streamlined . Streamlining helps to make the air flow over an airplane as smoothly as possible . A scientist thinks of streamlines as imaginary lines along which particles of air flow smoothly ...
... airplane exposed to the air are streamlined . Streamlining helps to make the air flow over an airplane as smoothly as possible . A scientist thinks of streamlines as imaginary lines along which particles of air flow smoothly ...
Page 104
... AIRPLANE MODELS No one knows who built the first model airplane . Models of birds , carved from wood and able to fly like gliders , have been found in ancient Egyptian tombs . Early inventors such as Leonardo Da Vinci ( 1452-1519 ) ...
... AIRPLANE MODELS No one knows who built the first model airplane . Models of birds , carved from wood and able to fly like gliders , have been found in ancient Egyptian tombs . Early inventors such as Leonardo Da Vinci ( 1452-1519 ) ...
Page 569
... airplane . After years of patient experiments and trials with models , he completed a full - size airplane called the Aerodrome in 1903. Langley's gasoline - powered machine was to be launched from the top of a houseboat in the Potomac ...
... airplane . After years of patient experiments and trials with models , he completed a full - size airplane called the Aerodrome in 1903. Langley's gasoline - powered machine was to be launched from the top of a houseboat in the Potomac ...
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Adams Africa agriculture airplane Alaska American ancient animals ants areas Arkansas Asia atoms Australia became become began body buildings built called carried cars cause central century changes civilization coast colony continent designed developed early east engine England example farms fish flying forest give Greek grow houses important Indians industry interest Island Italy John kinds King known Lake land language largest later leading learned light live look major means metal miles mountains move natural Persian picture plane plants president region River Roman scientists side soil South southern stone story tion Today trees turned United University usually western wings writing young