At what velocity does the stone impact? (Link to picture included)

AI Thread Summary
To determine the velocity at which the stone impacts, it's essential to apply relevant physics equations, particularly those related to projectile motion. The discussion emphasizes the importance of showing work before receiving assistance, as per forum rules. Participants suggest starting with basic equations of motion, such as those for free fall and initial velocity. Understanding these equations will help in solving the problem step by step. Engaging with the material and demonstrating effort is crucial for effective learning and support.
mitochondria3
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I have no clue how to do this problem, so if someone could explain to me step by step, it would be greatly appreciated!


<a href="http://photobucket.com" target="_blank"><img src="http://i231.photobucket.com/albums/ee10/[URL="https://www.physicsforums.com/insights/when-did-mitochondria-evolve/"]mitochondria[/URL]3/DavidGoliath.jpg" border="0" alt="Photo Sharing and Video Hosting at Photobucket"></a>
 
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Can you please repaste the image?
 
DavidGoliath.jpg
 
Nvm, I did it.
 
It's against forum rules to help someone if they haven't shown any work. So can you at least start my writing down some relevant equations that you might have learned in class?
 
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Thread 'Struggle to understand the concept of the 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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