Jovian Planets, Asteroids, and The Sun-

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The discussion centers around a student's confusion regarding a physics assignment related to Jovian planets, asteroids, and the Sun. The student seeks clarification but does not require direct answers, indicating a desire for guidance. Respondents emphasize the importance of posting specific questions and showing attempted work to facilitate better assistance. A link to the homework questions is provided, along with a suggestion to utilize the Homework Help forum for more structured support. Overall, the conversation highlights the need for clarity and specificity in seeking help with complex physics topics.
ElizebethDylan
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Questions about homework should be posted in the Homework Help forum (https://www.physicsforums.com/forumdisplay.php?f=152"). You will need to show what working you've attempt so far, and be more specific about which of the 20 questions you linked to you need help with.
 
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Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
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Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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