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Why do aircraft fly? How do their wings support them? In the early years of aviation, there was an intense dispute between British and German experts over the question of why and how an aircraft wing provides lift. The British, under the leadership of the great Cambridge mathematical physicist Lord Rayleigh, produced highly elaborate investigations of the nature of discontinuous flow, while the Germans, following Ludwig Prandtl in Gottingen, relied on the tradition called technical mechanics to explain the flow of air around a wing. Much of the basis of modern aerodynamics emerged from...

Travel with fearsome Captain Blackbeard and his crew of pirates across the open seas as they search for treasure and capture ships. But just when Blackbeard thinks he has everything he ever wanted, he realizes that it s being a true pirate that he loves best. Emerald/Band 15 books provide a widening range of genres including science fiction and biography, prompting more ways to respond to texts."

Why do aircraft fly? How do their wings support them? In the early years of aviation, there was an intense dispute between British and German experts over the question of why and how an aircraft wing provides lift. The British, under the leadership of the great Cambridge mathematical physicist Lord Rayleigh, produced highly elaborate investigations of the nature of discontinuous flow, while the Germans, following Ludwig Prandtl in Gottingen, relied on the tradition called technical mechanics to explain the flow of air around a wing. Much of the basis of modern aerodynamics emerged from...

But during the summer after 7th grade, Martin meets a boy who will change his life forever. Jimmy Harker appears one night with a deceptively simple question: Will you help?

Where did this boy come from, with his strange accent and urgent request? Is he a dream? It's the most vivid...