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).
B because the 9th amendment guarantees that rights not specifically in the constitution can be retained by people
Question: What was the purpose of the 1881 Austro-Serbian Alliance? How is this similar to the Dual Alliance?
<u><em>Answer</em></u>:
The Dual Alliance of 1879 - Germany and Austria-Hungary made an alliance to protect themselves from Russia. The Austro-Serbian Alliance of 1881 - Austria-Hungary made an alliance with Serbia to prevent Russian aggression in Serbia.
HOPE THIS HELPS!!
Answer:
What they sold and the geography was a bug part of it.
Explanation:
The southern sold cash crops because of the long growing seasons and hot summers. The New England made money lumber, fishing, and whaling because they had poor soil, cold winters, and short growing seasons. The middle had pretty decent weather and climate so most of their money was made from grain and livestock giving them the nickname the breadbasket colonies.
In the end it depended on what they used to make money.
