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  1. Relationship between viscosity and velocity in fluid mechanics

    Oct 31, 2022 · Viscosity is an intrinsic property of fluids that remains constant regardless of the fluid's velocity, as long as the flow is laminar and the relationship between viscous force and …

  2. Phase and group velocity for the wave function - Physics Forums

    Jul 20, 2025 · Since the phase velocity is linear in , , the group velocity is an average of all the phase velocities in the wave pocket. This turns out true in the simplest case which wave …

  3. Is velocity ever a scalar quantity? • Physics Forums

    Dec 27, 2024 · Velocity is fundamentally a vector quantity, possessing both magnitude and direction, while speed is a scalar representing only magnitude. In the context of the SUVAT …

  4. Exit velocity of a gas through a hole • Physics Forums

    Sep 25, 2016 · The discussion centers on the relationship between the exit velocity of gas and the diameter of a hole in a pressurized container. Initially, it was suggested that the exit velocity …

  5. Average Speed vs. Velocity: Explained • Physics Forums

    Jul 9, 2021 · Though average speed over a finite interval of time is greater or equal to the magnitude of the average velocity, Instantaneous speed at an instant is equal to the …

  6. Velocity of air coming out of a nozzle - Physics Forums

    May 31, 2013 · To calculate the speed of air exiting a nozzle from a compressed air tank, the pressure ratio must be considered to determine if the flow is choked, which occurs when the …

  7. 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 …

  8. Can you have a negative average velocity? • Physics Forums

    Sep 3, 2012 · Negative average velocity is possible when considering displacement in a defined directional context. For example, if an object moves north and then south, its average velocity …

  9. Velocity divided by Acceleration gives distance? - Physics Forums

    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 …

  10. How to find angular velocity from torque? • Physics Forums

    Sep 6, 2013 · To find angular velocity (ω) from torque (τ), the relationship τ = Iα is used, where I is the moment of inertia and α is angular acceleration. Angular acceleration can be expressed as …