Quantum mechanics<span> (QM -- also known as </span>quantum physics<span>, or </span>quantum<span> theory) is a branch of </span>physics<span> which deals with physical phenomena at nanoscopic scales where the action is on the order of the Planck constant. It departs from classical </span>mechanics<span> primarily at the </span>quantum<span>realm of atomic and subatomic length scales.</span>
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C - Going to the park is a fun and helpful activity.
Explanation:
It isn't a fact. Having fun is what their own view on going to the park is, so it's an opinion.
Answer:
An American politician who served as a Republican U.S. Senator from the state of Wisconsin starting in 1947. He is known for alleging that numerous communists and Soviet spies and sympathizers had infiltrated the United States federal government, universities, film industry, and elsewhere. Ultimately, the smear tactics that he used led him to be censured by the U.S. Senate.
Explanation: