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1 godzinę temu · where v c is the isothermal sound speed. The equation has critical point at v = v c, through which the solution should pass, so that the flow at a great distance is supersonic.The initial speed cannot be arbitrary, and must be quite definite (~10 km s −1).At a temperature 10 6 K, Eq. gives at a distance of 1 AU a speed of about 300 km s −1This is quite consistent with the slow solar wind.
1 dzień temu · The moment of inertia depends on how mass is distributed around an axis of rotation, and will vary depending on the chosen axis. For a point-like mass, the moment of inertia about some axis is given by , where is the distance of the point from the axis, and is the mass. For an extended rigid body, the moment of inertia is just the sum of all ...
1 godzinę temu · The Sun is moved by the gravitational pull of the planets. The center of the Sun moves around the Solar System barycenter, within a range from 0.1 to 2.2 solar radii. The Sun's motion around the barycenter approximately repeats every 179 years, rotated by about 30° due primarily to the synodic period of Jupiter and Saturn.
1 dzień temu · Hurricane Katrina. Hurricane Katrina was a devastating and deadly Category 5 Atlantic hurricane that caused 1,392 fatalities and damages estimated at $186.3 billion (2022 USD) in late August 2005, particularly in the city of New Orleans and its surrounding area. [1] Katrina was the twelfth tropical cyclone, the fifth hurricane, and the third ...
1 dzień temu · The exponential function is defined on the entire domain of the complex numbers.The definition of sine and cosine can be extended to all complex numbers via = = + These can be reversed to give Euler's formula = + = When plotted on the complex plane, the function for real values of traces out the unit circle in the complex plane.. When is a real number, sine and cosine ...
1 dzień temu · The Abbasid Caliphate or Abbasid Empire (/ ə ˈ b æ s ɪ d, ˈ æ b ə s ɪ d /; Arabic: الْخِلَافَة الْعَبَّاسِيَّة, romanized: al-Khilāfa al-ʿAbbāsiyya) was the third caliphate to succeed the Islamic prophet Muhammad.It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abd al-Muttalib (566–653 CE), from whom the dynasty takes its name.
