How buoyant force and atmospheric pressure can be helpful in life ?

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Buoyant force and atmospheric pressure play crucial roles in everyday life, influencing various phenomena such as floating objects and the behavior of liquids. Without atmospheric pressure, many processes, including the boiling of water and the functioning of certain appliances, would be drastically different. In marine environments, buoyant forces allow ships to float and marine life to thrive at various depths. Additionally, atmospheric pressure is essential for breathing and weather patterns. Understanding these concepts can enhance comprehension of both natural and man-made systems.
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How buoyant force and atmospheric pressure can be helpful in life ?
 
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Is this a homework question? If so please show your working first.
 
thnaks in advance ! I am in 8th grade , these question are my homework . Please give me some ideas ! Thanks !
 
Did you read my post? PF rules state that students must show their attempts at a question before homework helpers can give advice. Have you got any thoughts about the question?

Can you think of anything that would be different if, say, there was no atmospheric pressure?
 
Where do you think they help in real life?

Name a few things and give an explanation as to why you think buoyant forces or atmospheric pressure relates with this.

We'll tell you if you're right or wrong.

I'll give you a hint; there's quite a bit dealing with oceanic stuff =). Not only there, but even in your home =p.
 
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...
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
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