Science Fair Physics Ideas - Win the Science Fair!

AI Thread Summary
Creative and impressive physics projects can significantly impact science fair outcomes. A well-executed, simple idea often yields better results than a complex, poorly executed one. Participants are encouraged to focus on clarity and thoroughness in their presentations. Engaging demonstrations that illustrate fundamental physics concepts can captivate judges. Ultimately, the quality of execution is crucial for success at the science fair.
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I've entered the science fair this year and my physics teacher would like the class to do a project relating to physics. I was wondering if anyone had any ideas that would completely blow away my teacher and the judges at the science fair. Something possible to do that is. Any ideas??
 
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There's a big thread on science fair projects.

That said, you'll usually get more mileage out of a well executed 'mundane' project than a poorly executed 'spiffy' one.
 
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 .
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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