<span>Among the most outstanding achievements of Marie and Pierre Curie are:
</span><span>1. Discovered the elements of Polonio and Radio.
</span><span>2. They discovered and coined the term radioactivity to refer to the energy produced by the elements they discovered.
</span><span>3. Identify the radioactive properties of thorium and uranium elements.
</span><span>4. Maria Curie founded the medical research institute Marie Curie in France.
</span><span>5. Development of portable radiology units for medical use during the First World War. Marie Curie, whose maiden name was Marie Sklodowska, was born in Poland in 1867.
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</span><span>She studied mathematics, physics, and chemistry in Paris and was the first French woman to receive a doctorate degree. For her contributions to science, she won a Nobel prize in physics and one in chemistry is the first woman to win a Nobel prize and the only person who has won a Nobel in two different scientific areas. Piere Curie was a French physicist known for his work with Marie Curie that led to the discovery of radioactivity and two new chemical elements.
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Answer:
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Explanation:
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The Selection committee for the exhibit was amazed to see such fine work done by a mere amateur.
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US nation witnessed many social and economic issues during Word War II. The then American president Roosevelt conveyed the four freedom of thought to the people with his sentimental policy focus on administration.
Explanation:
After the drastic effects of World War II, US national citizens experienced the problem of unemployment, low standard of living, The Great Depression, and low production. But Roosevelt adopted many policies to recover the losses. He also propagated the power of defending critical issues.
Roosevelt had framed his ideology with the four freedom of principles namely worship, want, fear, and speech. He envisaged such principles directly to the people with their sentiment thought.
The separation of powers and checks and balances grants each branch of government with their own limits of power. This prevents tyranny because the other branches will check the one branch's limits on the power and stop it before it gets out of hand.
