Astronomy Quizzes.pdf

istering ] RAMSS [} D2L Written Jun 21, 2023 9:51 PM - Jun 21, 2023 10:08 PM Attempt Score 99.98 % Overall Grade (Highest Attempt) 99.98 % Part 1 - Multiple Choice: Check Your Understanding , l There are 4 multiple choice questions in this section. Choose the best answer for each question. Part 2 - Case Study E | ] Imagine that you have received six pictures of six different children who live near six of the closest stars to the Sun. Each picture shows a child on his or her 12th birthday. The pictures were each broadcast directly to you (using a satellite) on the day of the child's birthday. Note the abbreviation "ly" is used below to represent a light-year. ¢ Eugene lives on a planet orbiting Ross 154, which is 9.5 ly from the Sun. ¢ Max lives on a planet orbiting Barnard's Star, which is 6.0 ly from the Sun. ¢ Crystal lives on a planet orbiting Sirius, which is 8.6 ly from the Sun. ¢ Sydney lives on a planet orbiting Alpha Centauri, which is 4.3 ly from the Sun. ¢ Kelly lives on a planet orbiting Epsilon Eridani, which is 10.8 ly from the Sun. ¢ Mitch lives on a planet orbiting Procyon, which is 11.4 ly from the Sun. Question 9 5.998 / 6 points v a 5 ey 3 A ] [l [l [l PR ) Il * s M Il ] [l £ 8

istering ] RAMSS [} D2L Question 9 5.998 / 6 points If each child was 12 years old when he or she sent his or her picture to you, how old was each of the children when you received their picture? Write the current age of each child in the corresponding blanks and DO NOT ROUND YOUR ANSWERS - KEEP ANY DECIMAL PLACES. Answer this way (without the quotes) years old" Eugene: 21.5 years old v(16.66 %) Max: 18 years old Vv(16.66 %) Crystal: 20.6 years old v(16.66 %) 16.3 years old v (16.66 %) 22.8 years old v (16.66 %) 23.4 years old v(16.66 %)

istering ] RAMSS [} D2L Question 12 2.997 / 3 points Imagine that you are observing the light from a distant star that was located in a galaxy 100 million ly away from you. By analysis of the starlight received, you are able to tell that the image we see is of a 10 million year old star. You are also able to predict that the star will have a total lifetime of 50 million years, at which point it will end in a catastrophic explosive death called a Supernova. Answer the following questions in the blanks provided. a) How old does the star appear to us here on Earth? Write your answer this way (without the quotes): million years old " 10 million years old v(33.3 %) b) How long will it be before we receive the light from the Supernova event? Write your answer this way (without the quotes): _____ million years " 40 million years __~ v(33.3 %) c) When did the Supernova explosion occur? Write your answer this way (without the quotes): _____ million years ago" ___60 million years ago v(33.3 %)

THE ELECTROMAGNETIC SPECTRUM raDI0 I microwave | INfRARED | wisBLe B uttRavioteT I x-ray | GAMMARAY i 10 10° 10° 10° 107 10" 05x10° VA VAVAVAIm™ Ty s % P Buildings Humans Honey Bee Pinpoint Protozoans Molecules Atoms Atomic Nuclei B VISIBLE Frequency % (inHz) 10 Consider this graph of three different stars' spectral curves. Assume that all three stars can be observed in the visible part of the spectrum.

istering [f] RAMSS [} D2L il Consider this graph of three different stars' spectral curves. Assume that all three stars can be observed in the visible part of the spectrum. 4 A C Energy B Output (per second) Wavelength j Question 11 0/ 1 point Rank the visible color of each star, going from most blue to most red (Most Blue = 1...Most Red = 3) x _2 _(3)C x _3 (2B v_1_ A Part C: Calculations , - , ,, ,, o ._] Choose the best numerical answer to each question. Note, each question in this section is worth 2 marks.

istering [f] RAMSS [} D2L (Most Blue = 1...Most Red = 3) x _2_(3C x _3 (2B v_ 1 A Part C: Calculations | Choose the best numerical answer to each question. Note, each question in this section is worth 2 marks. Question 18 0/ 2 points A blackbody emission spectrum of object A peaks in the infrared region of the electromagnetic spectrum at a wavelength of 2000 x 10°? m. That of object B peaks in the violet region, at 400 x 107 m. According to Wien's Law, how many times hotter is B compared to A? % (@) 3 times hotter ' 1/3 as hot - 25 times hotter 625 times hotter = 5 times hotter

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