Tuesday, March 28, 2023

Average Densities

Here are the planets of the solar system arranged in order of increasing average density:

  1. Saturn - 0.69 g/cm³
  2. Uranus - 1.27 g/cm³
  3. Jupiter - 1.33 g/cm³
  4. Neptune - 1.64 g/cm³
  5. Mars - 3.93 g/cm³
  6. Venus - 5.24 g/cm³
  7. Mercury - 5.427 g/cm³
  8. Earth - 5.52 g/cm³

Note that the densities listed above are approximate values and are given in grams per cubic centimeter (g/cm³). The average density of a planet depends on its size, composition, and internal structure.

Tuesday, December 13, 2022

What do we mean by inflation?


What do we mean by inflation?


A) the expansion of the universe that we still observe today

B) the sudden release of photons when a particle and antiparticle annihilate one another

 C) a sudden and extremely rapid expansion of the universe that occurred in a tiny fraction of a second during the universe's first second of existence

D) quantum fluctuations by high speed, relativistic particles in a state of false vacuum that caused disturbances in the space-time continuum leading to the process described in the question to which this answer refers

Tuesday, September 13, 2022

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