1. ### Meshing & connection issues for a beam/line solid

I designed two geometries (one for beam/line reinforcements and other second for a solid block shown below) in Ansys workbench spaceclaim for static structural analysis. In Ansys workbench Mechanical, I got a weird mesh for the reinforcements which I modelled as beam in Spaceclaim (shown...
2. ### Engineering RC Circuit/Node voltage question

Homework Statement Homework Equations The Attempt at a Solution So you need to find the voltage across node D while the capacitor is charging, so it is going to be related to the voltage of the capacitor, so a function of time, so you need to come up with the equation for Vc(t), which I...
3. ### Difference between pressure antinodes and displacement node?

Homework Statement An organ pipe with one end open and the other closed is operating at one of its resonant frequencies. The open and closed ends are respectively: A. pressure node, pressure node B. pressure node, displacement node C. displacement antinode, pressure node D. displacement node...
4. C

### B Node at a closed end and an antinode at a open end of a tube

What causes there to be a node at a closed end of an air column and an antinode at the open end of a air column? Why doesn't it change as the wave oscillates?
5. ### Nodes in a Standing Wave

Homework Statement Two identical loudspeakers are driven in phase by a common oscillator at 800 Hz and face each other at a distance of 1.25 m. Locate the points along the line joining the two speakers where relative minima of sound pressure amplitude would be expected. Homework Equations v...
6. ### Efficient way to solve truss by hand

Homework Statement Hello. Given the statically determinate truss shown in the image, solve for all forces in the members, in terms of the load P. Homework Equations Equations of equilibrium. Node analysis. Section analysis. The Attempt at a Solution I was able to solve it by solving first...
7. ### I Coherent States

Hi, Can anyone please explain the physical meaning of coherence(Quantum Mechanics). Thanks is advance

Dear Everyone, Could anyone explain why we count only the number of radial nodes between the subshells that have the same orbital angular momentum l ? For example, 3p-orbitals have 1 radial node that exists between the 3p- and 2p-orbitals. Shouldn't be there additional radial nodes that exist...
9. ### I Pressure standing wave nodes at the end of the open side of

I do not understand why standing sound waves can be formed in a one-side or two-side open tube. Consider a one-side open tube. In particular how does the reflection of the wave at the open end occur? I found the following explanation. I do not get why the pressure at the open end cannot vary...
10. ### Nodes of an orbital

In a radial node of an orbital, say of 3px orbital, is the probablity for finding the 3px electron there is 0 but an electron of another orbital, say 2px, can be found there, OR the chance of finding electron of any orbital in a node of a certain orbital is 0?
11. ### Advection equation stability for explicit scheme

Hello, I have a typical 1D advection problem where a cold fluid flows over a flat plate. I did an energy balance to include conduction, convection and friction loss and I got the PDE's for the fluid and the solid. I used finite differences to solve the system as T(x, t) for both fluid and...
12. ### How many nodal lines?

Homework Statement How many nodal lines are created by two point sources emitting at the same wavelength that are separated by a distance equal to 2.5 lamda? Homework Equations My textbook says, "If two coherent sources located a distance d apart emit identical waves of wavelength lamda, then...
13. ### Equation of motion for a massless spring system

Homework Statement Homework Equations f_spring = k(x_near - x_far) The Attempt at a Solution a. FBD: The force goes through the nodes, and the sum of the forces must be 0 because the nodes are massless. Therefore, kx_1 = x(t) So x_1(t) = x(t)/k b. FBD: For this system, the parallel...