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The Raspberry Pi 4 Model B was released in June 2019 [26] with a 1.5 GHz 64-bit quad core ARM Cortex-A72 processor, on-board 802.11ac Wi-Fi, Bluetooth 5, full gigabit Ethernet (throughput not limited), two USB 2.0 ports, two USB 3.0 ports, 1, 2, 4, or 8 GB of RAM, and dual-monitor support via a pair of micro HDMI (HDMI Type D) ports for up to ...
Direct democracy or pure democracy is a form of democracy in which the electorate directly decides on policy initiatives, without elected representatives as proxies, as opposed to the representative democracy model which occurs in the majority of established democracies.
Adequate levels are defined as near 50 μmol/L. Hypovitaminosis of vitamin C is defined as less than 23 μmol/L, and deficiency as less than 11.4 μmol/L. [11] For people 20 years of age or above, data from the US 2017–18 National Health and Nutrition Examination Survey showed mean serum concentrations of 53.4 μmol/L.
Ethylene (IUPAC name: ethene) is a hydrocarbon which has the formula C 2 H 4 or H 2 C=CH 2.It is a colourless, flammable gas with a faint "sweet and musky" odour when pure. [7] It is the simplest alkene (a hydrocarbon with carbon–carbon double bonds).
Germany, [e] officially the Federal Republic of Germany, [f] is a country in Central Europe.It lies between the Baltic and North Sea to the north and the Alps to the south. Its sixteen constituent states have a total population of over 82 million in an area of 357,596 km 2 (138,069 sq mi), making it the most populous member state of the European Union.
As of April 2024, Mexico has the 12th largest nominal GDP (US$1.848 trillion), the 12th largest by purchasing power parity (US$3.303 trillion) and a GDP in PPP per capita of US$24,971. [168] The World Bank reported in 2023 that the country's gross national income in market exchange rates was the second highest in Latin America after Brazil at ...
In most of these applications, direct combustion is a fire hazard, and so acetylene has been replaced, first by incandescent lighting and many years later by low-power/high-lumen LEDs. Nevertheless, acetylene lamps remain in limited use in remote or otherwise inaccessible areas and in countries with a weak or unreliable central electric grid .
The fertility rate in the Netherlands is 1.78 children per woman (2018 estimate), [6] which is high compared with many other European countries, but below the rate of 2.1 children per woman required for natural population replacement. [201] The Netherlands has one of the oldest populations in the world, with the average age of 42.7 years. [6]