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Who was the first person to fly across the Atlantic ocean?  What was the name of the aircraft?

After World War I, Germany revived _________________ as a major aeronautical activity.

Adverse yaw is the natural and undesirable tendency for an aircraft to yaw in the opposite direction of a roll. It is caused by the difference in lift and drag of each wing.  When the Wright Brothers experience this, they countered adverse yaw with the coordinated introduction of input from a ___________

Germany made many strides in airship design with its Zeppelin. This rather large airship was __________________(rigid or semi-rigid)[A] and used ____________(hot air/heliuem/hydrogen)[B] to get it to float in air.   

Circa 1925, German Zeppelins have flown to the North Pole and around the world.

Comparative anatomy ultimately links organisms to 

Spectral lines are of particular importance in astronomy because

One essential condition for “seasons” to occur on a planet is that the planet’s

Which of the following costs would be included as part of direct materials in the production of an automobile?

Which of the following costs is NOT a product cost for a manufacturer?