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6.2.3a Galaxies and the scale of the Universe

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Question 16
a.

State the condition required for a main sequence star to remain stable and constant in size.

[1]
b.

Define the Hubble constant.

[1]
c.

State the equation that relates the Hubble constant, H0H_0H0​, to an estimate of the age of the Universe, TTT.

[1]
d.

Calculate an estimate for the age of the Universe in seconds, using a Hubble constant value of 2.3×10−18 s−12.3 \times 10^{-18} \text{ s}^{-1}2.3×10−18 s−1.

[2]
Markscheme

6.2.3a Galaxies and the scale of the Universe Questions

  1. IGCSE
  2. /Physics
  3. /6.2.3a Galaxies and the scale of the Universe

59 exam-style questions on CIE IGCSE Physics 6.2.3a Galaxies and the scale of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.

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