PHYS 1902 - Assignment 4 Questions.pdf - PHYS 1902...

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1PHYS 1902 Assignment 4 SolutionsSummer 2021Due: Thursday, August 12, 2021 at 11:59 p.m. Eastern TimeThis assignment is worth 10% of your final grade.It covers Chapters 2024 in the textbook(Chaisson & McMillan,Astronomy Today, 9thEdition). Please provide written explanations for allconceptual questions, and show all your work for any mathematical calculations.Assignmentsmust be submitted through Brightspace.Good luck!1.What are the similarities between a nova and a Type I supernova?What are thedifferences?(5 marks)2.Explain how astronomers know that globular clusters are made of old stars.(4 marks)3.Explain how the turnoff point on the H-R diagram of a star cluster isrelated to the cluster’sage.(4 marks)4.If the Sun suddenly became a black hole, how would the Earth’s orbit be affected?Explain.(4 marks)5.To what density must the matter of a 20𝑀star be compressed in order for the star todisappear within its event horizon?(8 marks)6.In the classic 1960s science-fiction comic bookThe Atom

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