COSMIC PERSPECTIVE FUND.(LL BK+CODE)
3rd Edition
ISBN: 9780135720158
Author: Bennett
Publisher: PEARSON
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Textbook Question
Chapter 12, Problem 4QQ
Choose the best answer to each of the following. Explain your reasoning.
According to Lcavitt’s law, we can determine the luminosity of a Cepheid in a distant galaxy by (a) measuring its parallax. (b) measuring its period of brightening and dimming. (c) measuring its recession speed.
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PLEASE be clear in your answer since the last time I posted was incorrect, and only answer part b, thanks.
Think of our Milky Way Galaxy as a flat circular disk of diameter 100,000 light-years. Suppose we are one of 1000 civilizations, randomly distributed through the disk, interested in communicating via radio waves. How far away in light years would the nearest such civilization be from us on average? Show your working. (Hint: Begin by calculating the area of the disk. Find the area of one of a 1,000 squares. Consider the separation of the centres of two adjacent squares.)
PLEASE be clear in your answer since the last time I posted was incorrect and only answer part a, thanks.
Chapter 12 Solutions
COSMIC PERSPECTIVE FUND.(LL BK+CODE)
Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Prob. 2QQCh. 12 - Prob. 3QQCh. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....
Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Choose the best answer to each of the following....Ch. 12 - Prob. 13SEQCh. 12 - Explain all answers clearly, with complete...Ch. 12 - Explain all answers clearly, with complete...Ch. 12 - Explain all answers clearly, with complete...Ch. 12 - Explain all answers clearly, with complete...Ch. 12 - Explain all answers clearly, with complete...Ch. 12 - Explain all answers clearly, with complete...Ch. 12 - Explain all answers clearly, with complete...
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