Density and states of matter

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Question 13
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A massive star has evolved to become a white dwarf.

The mass, MMM, of the white dwarf, of radius RRR, is given by global volumetric mass density relation:

M=4×π×D×R33 M = \frac{4 \times \pi \times D \times R^3}{3} M=34×π×D×R3​

where:

  • M=2.4×1030 kgM = 2.4 \times 10^{30} \text{ kg}M=2.4×1030 kg
  • D=2.0×109 kg/m3D = 2.0 \times 10^{9} \text{ kg/m}^3D=2.0×109 kg/m3 (the average density of the white dwarf)

Calculate the radius, RRR, of this white dwarf. Give your answer to 2 significant figures.

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Density and states of matter Questions

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