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  2. What is a pivot column in a system of linear equations? - Physics...

    www.physicsforums.com/threads/what-is-a-pivot-column-in-a-system-of-linear...

    The pivot column is significant because it represents a linearly independent variable in the system of equations. This means that the pivot column can be used to solve for the corresponding variable in the system. Can a matrix have more than one pivot column? Yes, a matrix can have more than one pivot column.

  3. Stiffness of column when fixed versus pin fixed - Physics Forums

    www.physicsforums.com/threads/stiffness-of-column-when-fixed-versus-pin-fixed...

    Stiffness of column when fixed versus pin fixed. In summary, the stiffness of a column in a frame with a lateral load at the joint is determined by its end deflection under a unit load. For a fixed-fixed column with translation at the joint, this stiffness is equivalent to that of a fixed-guided beam, resulting in a stiffness of 12EI/L^3.

  4. How much air pressure is needed to push water up a column? -...

    www.physicsforums.com/threads/how-much-air-pressure-is-needed-to-push-water-up...

    The air pressure needed to push water up a column is directly related to the height of the water column. The pressure required can be calculated using the formula: Pressure (P) = Height (h) × Density of water (ρ) × Gravitational acceleration (g). For water, this is approximately 0.1 psi per foot of water column height.

  5. How would I calculate water pressure in a vertical column? -...

    www.physicsforums.com/threads/how-would-i-calculate-water-pressure-in-a...

    Column Pressure Vertical Water Water pressure. In summary: I had no idea that 2 inches was smaller than 4 inches either.The column of water will apply a certain force on the water below due to the gravity acting on it. That force depends on the mass of the water column and on the acceleration due to gravity: F = m*g because the mass depends on ...

  6. Convert meter liquid column to bar? - Answers

    www.answers.com/general-science/Convert_meter_liquid_column_to_bar

    The pressure of a liquid column of height h ("h meter liquid column) is: P = ρ*g*h [Bar], where ρ is the density of the liquid g is the gravitational acceleration (on Earth, in average 9.80665 m/s2)

  7. MCNP Problem - Bad character in column 2 - Physics Forums

    www.physicsforums.com/threads/mcnp-problem-bad-character-in-column-2.1052718

    To identify the source of the "Bad character in column 2" error, carefully review the input file, especially the second column of each line. Look for any characters that do not conform to the expected MCNP format.

  8. Analyzing a Cylindrically Symmetric Plasma Column - Physics...

    www.physicsforums.com/.../analyzing-a-cylindrically-symmetric-plasma-column.263388

    Oct 11, 2008. Column Plasma Symmetric. In summary, a cylindrically symmetric plasma column with a uniform B field has a density function of n (r) = n0exp [- (r/r0)^2] and equal electron and ion densities of ni = ne = n0exp [e phi/kb Te]. The potential of the electrons (Ve) and the potential of the Debye sheath (VDe) are equal and opposite, with ...

  9. Moving water using pressure/vacuum - Physics Forums

    www.physicsforums.com/threads/moving-water-using-pressure-vacuum.372441

    The difference between the tank pressure you calculated (81214 Pa) and the pressure at the suction end of the hose (atmospheric, 101325 Pa) is just equal to the elevation head (the 2 meters) - so you have just enough vacuum to raise the column to the height of the tank, with essentially nothing left over for velocity. So the flow should be zero.

  10. Thermodynamics - Double U Tube Manometer with 2 Closed Ends

    www.physicsforums.com/threads/thermodynamics-double-u-tube-manometer-with-2...

    In summary, Thermodynamics -- Double U Tube Manometer with 2 Closed Ends: - Fresh water and sea water in parallel horizontal pipelines are connected to each other by a double U tube manometer. - The density of sea water is 1035 kg/m^3 while the density of air is 1.2 kg/m^3. - Standard temp and pressure are in use.

  11. How Does Oscillating Liquid in a U-Tube Calculate Potential...

    www.physicsforums.com/threads/how-does-oscillating-liquid-in-a-u-tube...

    Therefore, the average height of the liquid column in this arm is (h+2h)/2 = (3/2)h. Using the formula for potential energy, we can write the potential energy of this column as P = ρg(2r^2)(3/2)h = 3ρgr^2h. Now, to find the total potential energy of the liquid in the U-tube, we need to add the potential energies of the two columns together.