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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. Derivation of velocity in nth Bohr orbit • Physics Forums

    Mar 17, 2011 · The discussion focuses on deriving the expression for an electron's speed in the nth Bohr orbit and proving that the highest speed occurs in the n = 1 orbit, with a specific …

  3. Understanding Zero Velocity and Non-Zero Acceleration: Explained

    Aug 1, 2009 · Zero velocity can occur at a single instant while acceleration remains non-zero, as demonstrated by a ball thrown upwards that momentarily stops at its peak height. Throughout …

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

    Jul 9, 2021 · Average speed is defined as the total distance traveled divided by the total time, while average velocity is the change in position divided by the time interval for that change. In …

  5. Vertical circular motion minimum speed proof - Physics Forums

    Nov 21, 2009 · The minimum speed required for an object to complete a vertical circle is derived to be (rg)^0.5 at the top of the circle, where r is the radius and g is the acceleration due to …

  6. How to find the initial velocity given only angle and distance …

    Sep 19, 2010 · To find the initial velocity of an object launched at a 33-degree angle that lands 85 meters away, the correct formula is range = v0^2 * sin (2θ) / g. The calculated initial velocity is …

  7. 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 …

  8. 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 …

  9. 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 …

  10. 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 …