Skip to content

Course home

Sign up

6.2 Stars and the Universe

EasyMedium
12345678910111213141516171819202122232425262728
Question 19

A galaxy at a distance of 2.5 × 1021 km is moving away from Earth with a speed of 6000 km/s. 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 7.5 × 1021 km from Earth?

A

H0=2.4×10−18 s−1H_0 = 2.4 \times 10^{-18}\text{ s}^{-1}H0​=2.4×10−18 s−1, speed = 2000 km/s2000\text{ km/s}2000 km/s

B

H0=2.4×10−18 s−1H_0 = 2.4 \times 10^{-18}\text{ s}^{-1}H0​=2.4×10−18 s−1, speed = 18000 km/s18000\text{ km/s}18000 km/s

C

H0=4.2×1017 s−1H_0 = 4.2 \times 10^{17}\text{ s}^{-1}H0​=4.2×1017 s−1, speed = 2000 km/s2000\text{ km/s}2000 km/s

D

H0=4.2×1017 s−1H_0 = 4.2 \times 10^{17}\text{ s}^{-1}H0​=4.2×1017 s−1, speed = 18000 km/s18000\text{ km/s}18000 km/s

Markscheme

6.2 Stars and the Universe Questions

  1. IGCSE
  2. /Physics
  3. /6.2 Stars and the Universe

104 exam-style questions on CIE IGCSE Physics 6.2 Stars and the Universe, covering 6.2.1 The Sun as a star, 6.2.2a Galaxies and astronomical distances, 6.2.2b The life cycle of a star, 6.2.3a Galaxies and the scale of the Universe, 6.2.3b Redshift, 6.2.3c The Big Bang Theory and cosmic microwave background radiation, and 6.2.3d The Hubble constant and the age of the Universe. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank