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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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Section
BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

To get an idea of how empty deep spam is on the average, perform the following calculations:

(a) Find the volume our Sun would occupy if it had an average density equal to the critical density of thought necessary to halt the expansion of the universe.

(b) Find the radius of a sphere of this volume in light years.

(c) What would this radius be if the density were that of luminous matter, which is approximately 5% that of the critical density?

(d) Compare the radius found in part (c) with me 4-ly average separation of stars in the aims of the Milky Way.

To determine

(a)

The volume occupied by Sun.

Explanation

Given:

Critical mass density, ρ=1026kg/m3

Mass of Sun, ms=1.989×1030kg

Formula:

Formula to calculate the volume occupied by Sun is,

  ρ=msV   ......... (I)

Where,

  • ms is mass of Sun.
  • V is volume occupied by Sun.

Calculation:

Substitute 1026kg/m3 for ρ and 1.989×1030kg for ms in equation (I)

To determine

(b)

The radius of the sphere.

To determine

(c)

The radius of the sphere of the luminous matter.

To determine

(d)

The comparison of the radius of the luminous matter with 4 ly average separation of stars.

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