The New Book of Knowledge, Volum 1Grolier Incorporated, 1989 - 21 sider An illustrated encyclopedia containing over 9000 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. |
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Side 38
... speed , lower pressure Lift Wing Lower speed , higher pressure Fig . 5 Airstream deflected downward Lift Wing Airflow WHAT KEEPS A PLANE UP IN THE AIR ? Notice that the shape of a venturi tube re- sembles the curved top surface of a ...
... speed , lower pressure Lift Wing Lower speed , higher pressure Fig . 5 Airstream deflected downward Lift Wing Airflow WHAT KEEPS A PLANE UP IN THE AIR ? Notice that the shape of a venturi tube re- sembles the curved top surface of a ...
Side 40
... speed of sound . ( b ) When the plane reaches the speed of sound , the waves begin to pile up , forming a sort of wall . ( c ) When the airplane moves faster than the speed of sound , it crashes through the wall , causing a sonic boom ...
... speed of sound . ( b ) When the plane reaches the speed of sound , the waves begin to pile up , forming a sort of wall . ( c ) When the airplane moves faster than the speed of sound , it crashes through the wall , causing a sonic boom ...
Side 118
... ( speed through the air ) is seldom the same as its ground speed ( speed in relation to the ground ) . For example , if a plane flies into the wind , this head wind reduces the plane's ground speed but does not affect its airspeed . If ...
... ( speed through the air ) is seldom the same as its ground speed ( speed in relation to the ground ) . For example , if a plane flies into the wind , this head wind reduces the plane's ground speed but does not affect its airspeed . If ...
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