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Sunday, December 11, 2022

Newton’s universal law of gravitation

The gravitational attraction between any two objects is given by the equation which symbolically summarizes Newton’s universal law of gravitation:

Fgravity = G M1 M2 / R2

where
Fgravity is the gravitational force between two objects,
M1 and M2 are the masses of the two objects, and
R is separation of their mass centers.
G is a constant number known as the universal gravitational constant.

Monday, September 5, 2022

The names of the seven days of the week 🔭

The names of the seven days of the week are based on the ... 
Answer
* A) seven naked-eye objects that appear to move among the constellations. 
  B) seven planets closest to the Sun. 
  C) seven brightest stars in the prominent constellation Orion. 
  D) most popular Norse gods. 
  E) seven largest constellations of the ancient world.

Monday, July 18, 2022

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Herbert Draper - The Lament for Icarus Pin
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Finding the direction of the cross product by the right-hand rule Pin
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illusion Pin
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Rainbow Pin
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