Help With Physics Investigatory Project

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A user is seeking suggestions for a simple investigatory project topic related to physics. They express interest in combining physics with chemistry, specifically mentioning rust removal. The user is looking for guidance on how to approach this combination effectively. A reminder is provided that there is an existing thread on this topic in the K-12 forum. The discussion emphasizes the need for clarity and simplicity in selecting a project topic.
nyita
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hellllppp P-L-E-A-S-E!

hey can you give me a SIMPLE topic for my investigatory project? thanks alottt mwahugz... please... related to physics.. ONLY... hehe... please...
 
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hey mr Locrian please help me bout your rust removal thing.. my teacher said its more on chemistry but its ok if i will combine physics and chemistry.. but i dunt kno how.. help me.. please?
 
Thread 'Gauss' law seems to imply instantaneous electric field'

Thread 'Gauss' law seems to imply instantaneous electric field'

Imagine a charged sphere at the origin connected through an open switch to a vertical grounded wire. We wish to find an expression for the horizontal component of the electric field at a distance ##\mathbf{r}## from the sphere as it discharges. By using the Lorenz gauge condition: $$\nabla \cdot \mathbf{A} + \frac{1}{c^2}\frac{\partial \phi}{\partial t}=0\tag{1}$$ we find the following retarded solutions to the Maxwell equations If we assume that...
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Thread 'Highway: Deriving speed from Doppler shift'

I passed a motorcycle on the highway going the opposite direction. I know I was doing 125/km/h. I estimated that the frequency of his motor dropped by an entire octave, so that's a doubling of the wavelength. My intuition is telling me that's extremely unlikely. I can't actually calculate how fast he was going with just that information, can I? It seems to me, I have to know the absolute frequency of one of those tones, either shifted up or down or unshifted, yes? I tried to mimic the...
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