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a) In interlaced scan systems, the information for one picture is divided up into two fields. Each field contains one-half of the lines required to produce the entire picture. Adjacent lines in the picture are in alternate fields. b) Half of the horizontal lines (262.5 in NTSC and 312.5 in PAL) needed to create a complete picture.
Nuclear fusion is a reaction in which two or more atomic nuclei (for example, nuclei of hydrogen isotopes deuterium and tritium), combine to form one or more atomic nuclei and neutrons. The difference in mass between the reactants and products is manifested as either the release or absorption of energy .
Artificial intelligence (AI), in its broadest sense, is intelligence exhibited by machines, particularly computer systems.It is a field of research in computer science that develops and studies methods and software that enable machines to perceive their environment and use learning and intelligence to take actions that maximize their chances of achieving defined goals. [1]
Trains are divided into three categories (called "Le Frecce"): Frecciarossa ("Red arrow") trains operate at a maximum of 300 km/h (185 mph) on dedicated high-speed tracks; Frecciargento (Silver arrow) trains operate at a maximum of 250 km/h (155 mph) on both high-speed and mainline tracks; Frecciabianca (White arrow) trains operate at a maximum ...
Philadelphia (/ f ɪ l ə ˈ d ɛ l f i. ə / ⓘ fill-ə-DEL-fee-ə), colloquially referred to as Philly, is the most populous city in the U.S. state of Pennsylvania [11] and the sixth-most populous city in the United States, with a population of 1,603,797 in the 2020 census.
In 1863, two years prior to emancipation, Black people owned 0.5 percent of the national wealth, while in 2019 it is just over 1.5 percent. [147] Racial disparity in poverty rates has narrowed since the civil rights era, with the poverty rate among African Americans decreasing from 24.7% in 2004 to 18.8% in 2020, compared to 10.5% for all ...
In a 2014 study, the mass of the entire Milky Way is estimated to be 8.5 × 10 11 M ☉, [139] but this is only half the mass of the Andromeda Galaxy. [139] A recent 2019 mass estimate for the Milky Way is 1.29 × 10 12 M ☉ .
If divided evenly, the $99 trillion represents an average of $782,000 per household (for about 126.2 million households) or $302,000 per person. However, median household net worth (i.e., half of the families above and below this level) was $97,300 in 2016.