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    Temperature profile around heat source

    Homework Statement A point source in water provides 10 W of heat for 10 seconds, and is then shut off. The surrounding water has a temperature of 20 °C. Provide the temperature profile as a function of distance r and time t. Homework Equations The Attempt at a Solution If it...
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    Moment and force calculation for cantilever beam

    Homework Statement A cantilever beam (prismatic, rectangular cross section) is loaded at the tip by a force P and at half its length L by a moment M. a. Calculate the reaction force and moment. b. Draw the shear force and bending moment diagrams Homework Equations ∑F=0; ∑M=0 The...
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    Dimension of Hilbert space (quantum mechanics)

    Homework Statement Consider the states with the quantum numbers n = l = 1 and s = 1/2 Let J = L + S What is the dimension of the Hilbert space to describe all states with these quantum numbers? Homework Equations The Attempt at a Solution I believe the dimension of the Hilbert...
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    Question regarding charges on a hollow sphere

    Homework Statement I have a hollow conducting sphere with a charge on it, and I'm looking at the static situation. Where are the charges located? Homework Equations Gauss' Law The Attempt at a Solution A static situation, so no electric field inside the sphere, or charges would move...