University of Colorado
University of Colorado: Ph Et Interactive Simulations: Balloons & Buoyancy
Students studying buoyancy will better understand its concepts with this virtual experiment using various balloons and testing what makes them float or sink.
Independence Hall Association
U.s. History: Farewell to Isolation
President Wilson's claim, "he kept us out of war," did not last. Read about the increasing number of reasons for American to declare war against Germany. See why war was finally declared in April, 1917.