Cesar Chavez and Maurice Ferre are two I know.
Marie Curie studied the radiation of all compounds containing the known radioactive elements, including uranium and thorium, which she later discovered was also radioactive. She also found out that:
- you can exactly measure the strength of the radiation from uranium;
- the intensity of the radiation is proportional to the amount of uranium or thorium in the compound - no matter what compound it is;
- the ability to emit radiation does not depend on the arrangement of the atoms in a molecule; it must be linked to the interior of the atom itself - a revolutionary discovery!
When she realized that some uranium and/or thorium compounds had stronger radiation than uranium, she made the following hypothesis: there must be an unknown element in the compound which had a stronger radiation than uranium or thorium. Her work aroused the interest of her husband, Pierre Curie, who stopped his own research on crystals and joined the "detective work" with his wife. And Marie was proven right: in 1898 the Curies discovered two new radioactive elements: radium (named after the Latin word for ray) and polonium (named after Marie's home country, Poland).
Answer:
Checks and Balances
Explanation:
the three branches of government check each other's decisions in order to stop themselves from having too much control.
Answer:
B
Explanation:
Cuba, Gwam and Puerto Rico were all now sovern states of the US
USA Patriot Act. What you have to do is list down the names of suspected suspects. Most of them changes their names so make sure to also take note of their physical appearances. Report this to the local officials in your police department. If they refuse, the FBI can be another choice and describe the problem thoroughly.
