Greek navy had smaller and faster ships.
Answer: 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
The type of natural resources is gold which hernando de soto hope to find in the new world. In 1540 a spanish conquistador led 600 soldiers across Georgia. He was searching for cities of gold in the new world. He tortures and enslaved the natives in order to gain information about gold and silver. Her never found the gold but he did leave a lasting impact on the native americans. <span />
Which was true of the Aryans when they migrated to the Indian subcontinent?
A) They wrote in Sanskrit.
B) They were nomadic.
C) They came from cities.
<u>D) They were agricultural.</u>
