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Hace 8 horas · Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measured with a thermometer.It reflects the average kinetic energy of the vibrating and colliding atoms making up a substance.. Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for ...
Hace 8 horas · Polish and allied aircraft were activated early this morning after Russia launched missile strikes on Ukraine, the Operational Command of the Polish armed forces said. Listen to a Daily podcast on ...
Hace 8 horas · Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States.With a population of 2,746,388 in the 2020 census, it is the third-most populous city in the United States after New York City and Los Angeles.As the seat of Cook County, the second-most populous county in the U.S., Chicago is the center of the Chicago metropolitan area, which is often ...