Help with Solutions for Mechanics Book by Kleppner & Kolenkow

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The mechanics textbook by Kleppner and Kolenkow lacks provided answers for its exercises, which frustrates high school physics students seeking to verify their solutions. While some users express the need for a solutions manual, others caution against relying too heavily on provided answers, advocating for a focus on understanding the problem-solving process. It is suggested that students should attempt problems independently before consulting any answers. Engaging with teachers for guidance on methods can enhance comprehension and learning. Overall, the discussion emphasizes the importance of mastering the material rather than just seeking correct answers.
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I am a high school physics student.I have a textbook on mechanics by Kleppner and Kolenkow.it's a great book with just one problem.all the exercise problems haven't been provided with an answer .so,it's maddening because i can't know whether my answer is correct.does this book have a solutions book?
 
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Sometimes having solutions aren't the best thing, because people tend to use the answer to figure out what to do. Even when you have answers, you should do the question, get the answer you think and then only look at the answer.

Focus on the method used, or ask your teacher what method to use for a question.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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