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15% ( +10% in profits exceeding BR$ 20.000 + 9% Social Contribution Tax or 15% for financial institutions, insurance and capitalisation companies ) 0% [50] 47.5% (27.5% income tax rate applied to annual income exceeding BR$55,976.15 [51] + 20% top social security tax rate for self-employed workers [52] )
Why is the Sun's corona so much hotter than the Sun's surface? (more unsolved problems in astronomy) The temperature of the photosphere is approximately 6,000 K, whereas the temperature of the corona reaches 1,000,000–2,000,000 K. The high temperature of the corona shows that it is heated by something other than direct heat conduction from the photosphere. It is thought that the energy ...
The company stated that it was wanting to increase the platform's appeal to a young adult audience of users 17–24, which it stated was the fastest-growing demographic on Roblox. On June 20, 2023, Roblox started allowing games rated as only for players 17 years and over, which are permitted to have more graphic violence, romantic themes, and ...
t. e. Generation Z (often shortened to Gen Z ), colloquially known as Zoomers, [1] [2] [3] is the demographic cohort succeeding Millennials and preceding Generation Alpha. Researchers and popular media use the mid-to-late 1990s as starting birth years and the early 2010s as ending birth years.
The University of California, Los Angeles ( UCLA) [1] is a public land-grant research university in Los Angeles, California, United States. Its academic roots were established in 1881 as a normal school then known as the southern branch of the California State Normal School which later evolved into San José State University.
Hydrogen peroxide ( H2O2) is a nonplanar molecule with (twisted) C 2 symmetry; this was first shown by Paul-Antoine Giguère in 1950 using infrared spectroscopy. [9] [10] Although the O−O bond is a single bond, the molecule has a relatively high rotational barrier of 386 cm −1 (4.62 kJ / mol) for rotation between enantiomers via the trans ...
Ethanol is the oldest known sedative, used as an oral general anesthetic during surgery in ancient Mesopotamia and in medieval times. [15] [16] Mild intoxication starts at a blood alcohol concentration of 0.03-0.05 % and induces anesthetic coma at 0.4%. [24] However, this use carried the high risk of deadly alcohol intoxication and pulmonary ...
Africa is the world's second largest and second-most populous continent after Asia. At about 30.3 million km 2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth 's land area and 6% of its total surface area. [7] With 1.4 billion people [1] [2] as of 2021, it accounts for about 18% of the world's human population.