Scientists use radiocarbon dating to estimate the age of artifacts
Answer: The Manhattan Project was the code name for the American-led effort to develop a functional atomic weapon during World War II.
Explanation: The Manhattan Project was the American program for researching and developing the first atomic bombs. The weapons produced were based solely upon the principles of nuclear fission of uranium 235 and plutonium 239, chain reactions liberating immense amounts of destructive heat energy.
It warned Roosevelt that Germany was developing an atomic bomb and encouraged him to start a nuclear program in the US that later became the Manhattan Project
Answer:
The correct answer is C. Francisco Vázquez de Coronado planned to search for Cíbola by relying on Friar Marcos de Niza to be his guide.
Explanation:
Cibola was a legendary city that was believed to be located somewhere in the American southwest. According to tradition it possessed unprecedented wealth.
As the Spaniards began to discover the New World, the idea arose that the city of Cibola might be located on this continent. In 1527, an expedition by the Spanish explorer Pánfilo de Narváez was shipwrecked off the coast of modern-day Texas. Álvar Núñez Cabeza de Vaca was one of the few survivors, who said they had heard the Indians talk about cities of enormous wealth.
Cibola has also been described by Marcos de Niza, a Franciscan monk, who claimed to have seen one of the cities from a distance on a journey of discovery.
In 1540, an expedition of the Spanish explorer Francisco Vásquez de Coronado set out to discover these seven cities and seize the alleged riches. However, the journey turned into a disappointment and many of the expedition members died along the way.
Collectives, command economy, basic health care benefits, and price controls
