Page 05 5. A galaxy has a recessional velocity of 0·30c. Hubble’s Law predicts that the distance between Earth and this galaxy is A 1·3 × 1017 m B 3·9 × 1025 m C 1·3 × 1026 m D 1·4 × 1041 m E 4·5 × 1042 m. 6. Measurements of the expansion rate of the Universe lead to the conclusion that the rate of expansion is increasing. Present theory proposes that this is due to A redshift B dark matter C dark energy D the gravitational force E cosmic microwave background radiation. 7. A student makes the following statements about the radiation emitted by stellar objects. I Stellar objects emit radiation over a wide range of frequencies. II The peak wavelength of radiation is longer for hotter objects than for cooler objects. III At all frequencies, hotter objects emit more radiation per unit surface area per unit time than cooler objects. Which of these statements is/are correct? A I only B III only C I and II only D I and III only E I, II and III [Turn over