When were books invented? When was football invented? When was the laser printer invented? When was the sailing ship invented? When was the ferry invented? When was the boneshaker invented? When was the internal combustion engine invented for airplanes?
They left Hungary andBALLPOINT PENstarted making ballpoint pens in England in 1943,ballpoint penduring World War I. English pilots liked the pens. Theycouldn't write with fountain pens in airplanes becausethe ink leaked out. Later, a French company called Bicbought the Biros' company.leakSome ...
People liked bikes 3.___ they were not as expensive as horses. They wouldn't have to build a special house for them or 4.___(feed) them. And then, trains, ships and airplanes began to appear around 5.___ world. Transportation (运输工具) between 6.___(city) around t...
Aluminum is found in the engine of automobiles, in the hulls of boats. It is also used in many parts of airplanes. In fact, the huge “airbus” planes would probably never have been produced if aluminum did not exist. By making vehicles lighter in weight aluminum has greatly reduced the ...
Kites were also used to develop airplanes. The Wright Brothers experimented with kites before they flew the first airplane. 39 In World War I the Germans developed a large kite that could transport people to a submarine (underwater ship). Kites were also used to carry radio signals over long...
The first box kite, named for its box-like body, was developed in the 19th century to test theories of flight and this type of cotton-covered kite greatly assisted the success of early airplanes. These kites are the ancestors of a heavier version of the box kite, called the double box ...
I am so in love with his sudden burst into making symmetry these past few months – planes, boats, race cars, race-car airplanes, fire engine airplanes…etc. For the 8 year old I chose a 3D drawing kit. When I saw it, it reminded me of the one time our high school tech teacher ...
That is precisely what the Tuskegee Airmen did.They were brave,intelligent,African American men and women who fought for the United States in World Warll. In l940,President Franklin Dclano Roosevelt agreed to allow African Americans to nv airplanes in the military.Before that,African Americans ...
Today,theusesofaluminumareinnumerable.Perhapsitsmostimportantuseisintransportation.Aluminumisfoundintheengineofautomobiles,inthehullsofboats.Itisalsousedinmanypartsofairplanes.Infact,thehuge“airbus”planeswouldprobablyneverhavebeenproducedifaluminumdidnotexist.Bymakingvehicleslighterinweightaluminumhasgreatlyreducedtheam...
He probably didn't know just how right he was. Advertisement - Continue Reading Below Pop Mech Pro: Military What a Future Space War Will Look Like China Invented an Invisibility Cloak for Drones New Underwater Nuclear Threats Against the U.S. ...