To determine the value of the Hubble constant, an astronomer measures the distance of a galaxy from the Earth as 3.6 × 1022 km.
She also measures the speed of recession of the galaxy from the Earth as 8.1 × 103 km/s.
From these data, what is the value of the Hubble constant?
2.3×10−22 s−12.3 \times 10^{-22}\text{ s}^{-1}2.3×10−22 s−1
2.3×10−19 s−12.3 \times 10^{-19}\text{ s}^{-1}2.3×10−19 s−1
4.4×1018 s−14.4 \times 10^{18}\text{ s}^{-1}4.4×1018 s−1
2.9×1026 s−12.9 \times 10^{26}\text{ s}^{-1}2.9×1026 s−1
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.