|
Title: The Milky Way Galaxy is Post by: Eric8925 on Mar 19, 2018 The Milky Way Galaxy is
a. a spiral galaxy. b. part of a cluster of galaxies that contains a few dozen galaxies. c. about 80,000 light years in diameter. d. All of the other choices are correct. Question 2 If the distance to the nearest star is 4.2 light-years, then a. the star is 4.2 million AU away. b. the light we see left the star 4.2 years ago. c. the star must have formed 4.2 billion years ago. d. the star must be very young. e. the star must be very old. Question 3 The speed of light is 3.0 105 km/s, and it takes 1.3 s for light to travel from the Moon to Earth. From this information, what is the distance to the Moon? a. 390,000 km b. 230,000 km c. 3.9 km d. 2.3 km e. 4.3 105 km Question 4 Earth has a radius of about 6400 km, the Sun has a radius of about 7.0105 km, and a rubber ball has a radius of 6.4 cm. If you were to construct a scale model of the solar system using the rubber ball to represent Earth, what is the radius of a ball needed to represent the Sun in your model? a. 7.0 105 cm b. 7.0 cm c. 700 cm d. 70 cm e. 7000 cm Title: The Milky Way Galaxy is Post by: grodriguezz on Mar 19, 2018 Content hidden
Title: The Milky Way Galaxy is Post by: Eric8925 on Mar 19, 2018 My teacher is very rude and likes to speed his way through a lesson without letting the class ask questions. Thank you for helping me. You're a life saver :)
|