Chapter 13 Test Your Understandings Questions with solutions 2024

Chapter 13 Test Your Understandings Questions with solutions 2024 Capella (in the constellation Auriga) is the sixth brightest star in the sky. When viewed with a high-power telescope, it is clear that Capella is actually two pairs of binary stars: the first pair are G-type giants; the second pair are M-type main sequence stars. What color does Capella appear to be? yellow If a star has very weak hydrogen lines and is blue, what does that most likely mean? The star is too hot for hydrogen lines to form. Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:05 / 0:15 Full screen Star A and star B are two blue stars at nearly the same distance from Earth. Star A is many times brighter than star B. Which of the following statements is true? Star A is a blue giant, and star B is a white dwarf. Star A and star B are two nearby stars. Star A has a parallactic angle 4 times as large as star B's. Which of the following statements is true? Star A is 1/4 as far away as star B. Star A and star B are two nearby stars. Star A is blue, and star B is red. Which of the following statements must be true? Star A is hotter than star B. Star A and star B are two red stars at nearly the same distance from Earth. Star A is many times brighter than star B. Which of the following statements is true? Star A is a red giant, and star B is a main-sequence star. Star A and star B are two stars nearly the same distance from Earth. Star A is blue, and star B is red, but they have equal brightness. Which of the following statements is true? Star A is smaller than star B. The percentage of hydrogen drops when changing from percentage by number of atoms to percentage by mass. But the percentage of helium grows. Why? Helium is more massive than hydrogen. Star A appears twice as bright as star B, but is also twice as far away. Star A is __________ as luminous as star B. 8 Times A telescope on Mars would be able to measure the distances to more stars than can be measured from Earth because the parallax "baseline" would be longer. An eclipsing binary system has a primary eclipse (star A is eclipsed by star B) that is deeper (more light is removed from the light curve) than the secondary eclipse (star B is eclipsed by star A). What does this tell you about stars A and B? Star A is hotter than star B. Star A and star B are a binary system. The Doppler shift of star A's absorption lines is 3 times the Doppler shift of star B's absorption lines. Which of the following statements is true? Star A is one-third as massive as star B. Star A and star B are nearly the same distance from Earth. Star A is half as bright as star B. Which of the following statements must be true? Star B is twice as luminous as star A.