Recent observations of Cepheid variables in nearby galaxies yield a value for the Hubble constant of 74 km s−1 Mpc−174\text{ km s}^{-1}\text{ Mpc}^{-1}74 km s−1 Mpc−1.
What is the value of this measurement in units of s−1\text{s}^{-1}s−1?
Given: 1 parsec=3.08×1016 m1\text{ parsec} = 3.08 \times 10^{16}\text{ m}1 parsec=3.08×1016 m
2.4×10−212.4 \times 10^{-21}2.4×10−21
2.4×10−122.4 \times 10^{-12}2.4×10−12
2.4×10−182.4 \times 10^{-18}2.4×10−18
4.2×10174.2 \times 10^{17}4.2×1017
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.