State the name of the constant represented in cosmology by the symbol H0H_0H0.
Write down the equation that defines H0 H_0\,H0 in terms of the speed v v\,v that a distant galaxy is moving away from the Earth and its distance d d\,d from the Earth.
The numerical value of H0 H_0\,H0 is 2.4 × 10-18. State the SI unit of H0H_0H0.
Use this value of H0 H_0\,H0 to determine an estimate for the age of the Universe in seconds.
State when cosmic microwave background radiation (CMBR) was formed and where in space we detect it coming from.
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.