That is true. It is good to learn more about the upcoming test so you can study and get prepare.
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1900<span>: Max Planck discovers that atoms can emit energy only in discrete amounts or "quanta" and that the energy of light is proportional to the frequency </span>
1900<span>: Ferdinand von Zeppelin builds the first rigid dirigible </span>
1900<span>: Sigmund Freud's "The Interpretation of Dreams" </span>
1901<span>: Guglielmo Marconi conducts the first transatlantic radio transmission (for the first time humans can send sounds to any place on Earth without any wires) </span>
1902<span>: Willis Carrier invents the air conditioner </span>
1902<span>: Clarence McClung discovers the sex chromosomes </span>
1903<span>: Wilbur and Orville Wright fly the first airplane </span>
1903<span>: Konstantin Tsiolkovsky's "The Exploration of Cosmic Space by Means of Reaction Devices" </span>
1903<span>: Valdemar Poulsen invents an arc transmitter for radio broadcasts </span>
1903<span>: William Bayliss and Ernest Starling discover that hormones are chemical messengers </span>
1904<span>: John Fleming uses a diode to detect radio signals </span>
1905<span>: Albert Einstein publishes "The Special Theory of Relativity" </span>
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