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He used trigonometry to calculate the radius of the Earth using measurements of the height of a hill and measurement of the dip in the horizon from the top of that hill. His calculated radius for the Earth of 3928.77 miles was 2% higher than the actual mean radius of 3847.80 miles. [19]
Height measurement can vary over the course of a day, due to factors such as a decrease from exercise done directly before measurement (i.e. inversely correlated), or an increase since lying down for a significant period of time (i.e. positively correlated).
In a 2018 study done by the Institute for Social Policy and Understanding, Muslim American women were, "the most likely" when compared to other domestic religious communities to, "wear "a visible symbol that makes their faith identity known to others."" [56] Of the Muslim women surveyed by ISPU, 46% say they wear a visible symbol to mark their ...
This is a list of the tallest people, verified by Guinness World Records or other reliable sources. According to the Guinness World Records, the tallest human in recorded history was Robert Wadlow of the United States (1918–1940), who was 272 cm (8 ft 11 in). He received media attention in 1939 when he was measured to be the tallest man in ...
Demographics of the world. Demographics of Earth. Population pyramid of the world in 2022 by the UN. Population. Over 8,120,531,329 (estimated) Fertility rate. 2.27 (2021) Earth has a human population of over 8 billion as of 2024, with an overall population density of 50 people per km 2 (130 per sq. mile). Nearly 60% of the world's population ...
The highest natural ground surface temperature ever recorded may have been an alleged reading of 93.9 °C (201.0 °F) at Furnace Creek, California, United States, on 15 July 1972. [ 7] In 2011, a ground temperature of 84 °C (183.2 °F) was recorded in Port Sudan, Sudan. [ 8] The theoretical maximum possible ground surface temperature has been ...
The troposphere is the lowest layer of Earth's atmosphere. It extends from Earth's surface to an average height of about 12 km (7.5 mi; 39,000 ft), although this altitude varies from about 9 km (5.6 mi; 30,000 ft) at the geographic poles to 17 km (11 mi; 56,000 ft) at the Equator, [23] with some variation due
Failed to achieve Earth orbit Molniya: 2 1M No.2: 1M No.2: 14 October 1960: OKB-1 Soviet Union: Flyby Launch failure Failed to achieve Earth orbit Molniya: 3 2MV-4 No.1: 2MV-4 No.1: 24 October 1962 Soviet Union: Flyby Launch failure Booster stage ("Block L") disintegrated in LEO: Molniya: 4 Mars 1: Mars 1 (2MV-4 No.2) 1 November 1962 Soviet ...