2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2 lightyears away from our planet.a) Express this distance in km and in the astronomical unit.b) Calculate the time that it will take for this star's light to reach earth.3. Find the weights of gelatin and butter contained in a cubic box with a side dimension of 0.03 cm. Gelatin has adensity of 79 Ib/ft² while butter has a density of 53 lb/ft’.

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Answered: 2. The nearest star to earth is the…

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter1: Physics And Measurement

Section: Chapter Questions

Problem 1.29P

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2. The nearest star to earth is the Proxima Centauri. It is approximately 4.2 lightyears away from our planet. a) Express this distance in km and in the astronomical unit. b) Calculate the time that it will take for this star's light to reach earth.