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Explain the statement “ Gravitation governs the motion of stars and slows the outward expansion of the entire universe because of the inward attraction of galaxies to other galaxies”

Explain the statement
 “ Gravitation governs the motion of stars and slows the outward  expansion of the entire universe  because of the inward attraction of galaxies to other galaxies”
 

Grade:11

1 Answers

Arun
25757 Points
3 years ago
There is an unlimited number of identical of three rows.
 
Number of arrangement of 7 balls in a row =3 
7
 
 
Number of arrangement of 6 balls in a row =3 
6
 
 
Number of arrangement of 5 balls in a row =3 
5
 
 
Number of arrangement of 4 balls in a row =3 
4
 
 
Number of arrangement of 3 balls in a row =3 
3
 
 
Number of arrangement of 2 balls in a row =3 
2
 
 
Number of arrangement of 1 balls in a row =3
 
∴ Number of arrangement of almost 7 balls in row that can be made (n)=3+3 
2
 +3 
3
 +3 
4
 +3 
5
 +3 
6
 +3 
7
 
 
As it is in GP
 
n= 
3−1
3(3 
7
 −1)
​ 
 
 
= 
2
3
​ 
 (2187−1)
 
= 
2
3
​ 
 ×2186
 
=3×1093
 
n=3279

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