It is either a or b but im leaning more towards a
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
Answer:
Lake Itasca in northern Minnesota, United States
Explanation: Its river basin starts in southern Ohio and ends on the coasts of Louisiana
I most likely live in a democratic two-party and two-session election. This means that other candidates from each party were already taken out of the equation for a nomination due to low votes, with other parties again not having enough support to appear on the voting ballot. This means that the only candidates that appear in the second session are the republican and the democratic candidate.
Answer:
Consumers made small, regular payments on large purchases
