A recent estimation of the Hubble constant, obtained from observations of gravitational wave standard sirens, yields a value of 2.35×10−18 s−12.35 \times 10^{-18}\text{ s}^{-1}2.35×10−18 s−1.
What is this value, written to 3 significant figures, in km s−1Mpc−1\text{km s}^{-1}\text{Mpc}^{-1}km s−1Mpc−1? (Take 1 pc=3.09×1016 m1\text{ pc} = 3.09 \times 10^{16}\text{ m}1 pc=3.09×1016 m)
66 exam-style questions on OCR A A Level Physics Astrophysics and cosmology, covering Stars, Electromagnetic radiation from stars, and Cosmology. Each one has a worked solution and a mark scheme showing where the marks go.