Answer
$2\times10^{-3}kg/m^3$
Work Step by Step
Density is mass divided by volume.
$$\rho=\frac{M}{\frac{4}{3}\pi r^3}$$
$$ =\frac{1.99\times10^{30}kg}{\frac{4}{3}\pi (6\times10^{10}m)^3}$$
$$=2\times10^{-3}kg/m^3$$
Physics: Principles with Applications (7th Edition)
by Giancoli, Douglas C.
Published by
Pearson
ISBN 10:
0-32162-592-7
ISBN 13:
978-0-32162-592-2
Chapter 33 - Astrophysics and Cosmology - Problems - Page 981: 5
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