April 22, 2017, marks the 47th anniversary of Earth Day—a day intended to inspire awareness and appreciation for the Earth's natural environment. Organizers started Earth Day in response to a…
(Amendments I to X inclusive, popularly known as the Bill of Rights, were proposed and sent to the states by the first session of the First Congress. They were ratified Dec. 15, 1791.)Amendment I[…
Empowering the National GovernmentThe Supreme CourtMarshall CourtMarshall Steps InTaking ControlEmpowering the National Government Now that Marshall had clearly established the Court's power…
TURBINESFIND OUT MOREMany modern machines, from motorbikes to jet aircraft, are powered by engines. An engine is a machine that turns fuel into movement. The fuel is burned to generate heat…
Wrestling with Radicals
Algebra
Wrestling with Radicals Introducing the Radical Sign Simplifying Radical Expressions Unleashing Radical Powers Radical Operations Solving Radical Equations…
Selected records. Source: National Aeronautic AssociationGreat Circle Distance Without LandingInternational: 2,213.04 mi; 3,561.55 km.Robert G. Ferry (U.S.) in Hughes YOH-6A helicopter powered by…
Energy is the power that we use for transportation, for heat and light in our homes and other places, and for the manufacture of all kinds of products. It has many other uses, too. The development…
Acute radiation syndrome, reactor meltdown, and nuclear disaster are all scary terms. Learn about what the terms mean in relation to Japan's 2011 crisis. By Jennie Wood…
Born: 1919Birthplace: New Haven, Conn. High-voltage, high-power semiconductor pin rectifier—Hall's invention boosted efficiency and reduced wasted power and destructive heat build-up in large-scale…
