Need Help Answering Astronomy Questions? Download the PDF!

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Four astronomy questions from a university course require detailed solutions, and a PDF with the questions is available for download. Participants are encouraged to provide answers while referencing the specific question numbers from the PDF. For question 1, knowledge of the mass of Helium-4 nuclei is essential, as it involves calculations using the mass of hydrogen nuclei. The discussion emphasizes the need for clarity in responses and collaboration to solve the questions. Assistance in answering these astronomy questions is actively sought.
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I have four questions that need to be answered. They are from my university course that I am taking in general astronomy 2. Could anybody tell me how I would obtain the detailed solutions to arrive at the answers? I have attached a pdf file of the questions and answers, please download it and see which you could answer in detail. Any help would be appreciated and remember to refer to which question number you are answering from the pdf file.
 

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For question 1., you need to know the mass of the nuclei of the Helium-4. When you have that you should be able to take the mass of the hydrogen nuclei (1 proton mass times 4000) and divide it by the nuclear mass of the He-4.
 

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