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Solve the all parts of given question:
Question: A cylindrical capacitor consists of a long wire of radius R1 and length L with a charge +Q and a concentric outer cylindrical shell of radius R2, length L and charge -Q.
Part A: Find the electric field magnitude and energy density everywhere.
Part B: Derive an expression for the energy stored in a cylindrical shell of thickness dr at a point between the conductors.
Part C: Integrate your expression from R1 to R2 to find the total energy stored in the capacitor.
I need help to find the total energy stored in the capacitor.
A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 8.48 x10^7 km. Radio waves travel at the speed of light (3.00 x10^8 m/s). How many seconds does it take for the signal to reach the Earth.
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