Jul 20, 2025 · As far as I know, if we have a wave function as a sum of many momentum eigen function, i.e., ψ = ∑ k α k e i (k x ω t), the group velocity is the velocity of the whole wave …

Oct 31, 2022 · The relationship between viscosity and velocity in fluid mechanics is clarified: viscosity is an intrinsic property of a fluid that remains constant regardless of the flow velocity. …

Jul 9, 2021 · The discussion clarifies the distinction between average speed and average velocity, emphasizing that average speed is defined as total distance divided by total time, while …

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, …

Calculating Nozzle Flow Rate To work out the flow rate of water from a nozzle we need to work out the volume in a given period of time. To do this we work out the area of the nozzle and …

Dec 13, 2020 · The escape velocity serves as a threshold; if an object's initial kinetic energy exceeds half the product of its mass and the square of the escape velocity (), it will not return …

Aug 1, 2009 · The key takeaway is that instantaneous velocity can be zero at specific moments, while acceleration remains non-zero, highlighting a common misconception in understanding …

Sep 3, 2012 · Negative average velocity is achievable in a multi-dimensional context, particularly when considering directional movement. For instance, if a vehicle travels north at 10 mph for …

Sep 9, 2008 · The discussion clarifies the relationship between torque, power, and angular velocity, emphasizing that power is equal to torque multiplied by angular velocity (P = τ × ω). It …

Sep 13, 2013 · The discussion centers on the physics problem of a diver jumping from a 3.00-meter high diving board with an initial upward velocity of 1.75 m/s. The diver's velocity upon …