Jul 20, 2025 · As far as I know, if we have a wave function as a sum of many momentum eigen function, i.e., ##\psi=\sum_k \alpha_k e^ {i (kx-\omega t)}##, the group velocity is the velocity …

Aug 1, 2015 · Force can indeed be expressed as mass flow rate times velocity, particularly in fluid dynamics scenarios like water flowing through a pipe or gas from a spray can. According to …

Jun 24, 2016 · Velocity divided by acceleration does not yield distance, as the units do not align correctly. The discussion highlights a common confusion between the symbol 's' representing …

Jan 16, 2015 · Homework Statement If a ball is dropped down a ramp of any shape, will the acceleration always be 9.8 assuming there is no friction. Homework Equations I...

Jul 11, 2025 · The average velocity is the rate of change of position over a time interval, while the instantaneous velocity is the rate of change of position at a point in time.

Mar 20, 2017 · Hello, How do you calculate the terminal velocity of a fluid through a pipe. My problem includes turbulent flow, very high reynold number, and water (incompresible).

Oct 31, 2022 · The viscous force within a fluid will depend on the velocity gradient (aka shear rate) within the fluid. That does not mean that the viscosity is a function of velocity. Viscosity is …

Jan 28, 2024 · To calculate the absolute velocity of air at the outlet of a centrifugal compressor, knowledge of the impeller diameter, RPM, and slip factor is essential. The slip factor relates …

Apr 15, 2020 · The discussion centers on the concept of four-velocity in the context of special relativity (SR) and its implications for spacetime. It is established that the magnitude of four …

Dec 27, 2024 · I thought velocity was always a vector quantity, one with both magnitude and direction. When it came to the suvat equations, where v = final velocity, and u = initial velocity, …