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 propagation'

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

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 'A scenario of non-uniform circular motion'

Thread 'A scenario of non-uniform circular motion'

(All the needed diagrams are posted below) My friend came up with the following scenario. Imagine a fixed point and a perfectly rigid rod of a certain length extending radially outwards from this fixed point(it is attached to the fixed point). To the free end of the fixed rod, an object is present and it is capable of changing it's speed(by thruster say or any convenient method. And ignore any resistance). It starts with a certain speed but say it's speed continuously increases as it goes...
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Thread 'Do electron density waves accompany EM waves in coaxial cables?'

Maxwell’s equations imply the following wave equation for the electric field $$\nabla^2\mathbf{E}-\frac{1}{c^2}\frac{\partial^2\mathbf{E}}{\partial t^2} = \frac{1}{\varepsilon_0}\nabla\rho+\mu_0\frac{\partial\mathbf J}{\partial t}.\tag{1}$$ I wonder if eqn.##(1)## can be split into the following transverse part $$\nabla^2\mathbf{E}_T-\frac{1}{c^2}\frac{\partial^2\mathbf{E}_T}{\partial t^2} = \mu_0\frac{\partial\mathbf{J}_T}{\partial t}\tag{2}$$ and longitudinal part...
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