Equally important, the Confederation provided the new nation with instructive experience in self-government under a written document. In revealing their own weaknesses, the Articles paved the way for the Constitutional Convention of 1787 and the present form of U.S. government. What is the main idea of the confederation? A guidingRead More →
Santa Anna possessed a magnetic personality and real qualities of leadership, but his lack of principles, his pride, and his love of military glory and extravagance, coupled with a disregard for and incompetence in civil affairs, led Mexico into a series of disasters and himself into ill repute and tragedy.Read More →
Research with embryonic stem cells may lead to new, more effective treatments for serious human ailments and alleviate the suffering of thousands of people. Diseases such as juvenile diabetes, Parkinson’s disease, heart failure and spinal cord injuries are examples. Can stem cells create life? Using embryonic stem cells, researchers createdRead More →
Proteus mirabilis swarming behavior is characterized by the development of concentric rings of growth that are formed as cyclic events of swarmer cell differentiation, swarming migration, and cellular differentiation are repeated during colony translocation across a surface. How do you stop swarming of Proteus? Sodium azide, barbitone, and sulfonamide alsoRead More →
The overdrive switch is on by default, until you switch it off. The reason for always being on is that it delivers a reasonable speed both during high-speed driving and running on a regular road. At that time, if overdrive was OFF, you would be driving at speed in aRead More →
The phrase “the coast is clear” dates back to the 16th century and originally meant that if one were attempting a landing from the sea in hostile territory, the beach was clear of enemies. The phrase used in Spanish to mean “the coast is clear” is “no hay Moros enRead More →
Despite poor economic conditions due to the Great Depression, Hoover faced little opposition at the 1932 Republican National Convention. Roosevelt united the party around him, campaigning on the failures of the Hoover administration. He promised recovery with a “New Deal” for the American people. What year was FDR elected forRead More →
Climate varies from region to region. This variation is driven by the uneven distribution of solar heating, the individual responses of the atmosphere, oceans and land surface, the interactions be- tween these, and the physical characteristics of the regions. What determines a climate? Climate is defined as an area’s long-termRead More →
Why Are Ink Cartridges So Expensive? Here’s a quick and simple answer: Ink cartridges are expensive so companies can make a profit. Most printers are sold at a loss. A manufacturer makes money NOT by selling consumers an inkjet or laser printer, but by selling the supplies needed to print.Read More →
The reason pressure changes lead to movement is Newton’s law of motion— a pressure is a flow of momentum from one place to another. Momentum always shows up as bulk motion of the center of mass. Momentum is a conserved quantity, and it moves from place to place, like charge,Read More →