Answer:it decreases the value of money
Explanation:
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Answer:
Eventually, railways lowered the cost of transporting many kinds of goods across great distances. These advances in transport helped drive settlement in the western regions of North America. They were also essential to the nation's industrialization. The resulting growth in productivity was astonishing.D
Explanation:
C is not an initiative of the Unemployed Citizens League of Washington.
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Answer:
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Explanation:
c. Segregation was enforced by many state and federal laws
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
