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6.2.3a Galaxies and the scale of the Universe

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Question 4

A galaxy at a distance of 1.8 × 1021 km is moving away from the Earth with a speed of 4500 km s-1.

What is the Hubble constant H0 H_0\,H0​ calculated using this data and what is the speed of a galaxy at a distance of 5.4 × 1021 km from the Earth?

A

H0=2.5×10−18 s−1H_0 = 2.5 \times 10^{-18}\text{ s}^{-1}H0​=2.5×10−18 s−1, speed =13500 km s−1= 13500\text{ km s}^{-1}=13500 km s−1

B

H0=2.5×10−18 s−1H_0 = 2.5 \times 10^{-18}\text{ s}^{-1}H0​=2.5×10−18 s−1, speed =1500 km s−1= 1500\text{ km s}^{-1}=1500 km s−1

C

H0=4.0×1017 s−1H_0 = 4.0 \times 10^{17}\text{ s}^{-1}H0​=4.0×1017 s−1, speed =13500 km s−1= 13500\text{ km s}^{-1}=13500 km s−1

D

H0=4.0×1017 s−1H_0 = 4.0 \times 10^{17}\text{ s}^{-1}H0​=4.0×1017 s−1, speed =1500 km s−1= 1500\text{ km s}^{-1}=1500 km s−1

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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