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  2. Degrees of freedom for t-test for 2 samples, 2 variances -...

    www.physicsforums.com/threads/degrees-of-freedom-for-t-test-for-2-samples-2...

    The formula is as follows: degrees of freedom = [ s12/n1 + s22/n2 ] 2 / [ ( s 12 /n 1 ) / n 1 + ( s 22 /n 2 ) / n 2 ] where s 12 is the variance of the first sample. s 22 is the variance of the second sample. n 1 - number of observations in the first sample. n 1 - number of observations in the second sample.

  3. Degrees of freedom and RMS-speed of CO2? - Physics Forums

    www.physicsforums.com/threads/degrees-of-freedom-and-rms-speed-of-co2.378203

    Where stand for degrees of freedom. So the RMS speed for carbon dioxide in 23 C must be: 5 degrees of freedom comprising three translational, two rotational (linear molecule) and 0 vibrational as they are negliguble at room temperature. Now, I will be very happy for any feedback (link to a site or anything) on whether my reasoning or ...

  4. How to calculate the degrees of freedom of a simple multi-body...

    www.physicsforums.com/threads/how-to-calculate-the-degrees-of-freedom-of-a...

    The general formula to compute DOFs in mechanical system is. DOF=3⋅ (𝑁−1)−2⋅𝐿. with. 𝑁 is the number of bodies. L number of joints. I intuitively understand that it has 2 degrees of freedom (rolling without slipping - RWS), but I struggle to formalize this according to the rules of the art: I obtain: 10 - 3 (ground) - (rolling ...

  5. Quadratic form and degrees of freedom- fixed title - Physics...

    www.physicsforums.com/threads/quadratic-form-and-degrees-of-freedom-fixed...

    The degrees of freedom in a quadratic form can be calculated by subtracting the number of constraints or restrictions from the total number of variables. For example, if a quadratic form has three variables and one constraint, it would have two degrees of freedom. 5.

  6. Degrees of freedom in the energy density formula for black body...

    www.physicsforums.com/threads/degrees-of-freedom-in-the-energy-density-formula...

    The formula involves the number of degrees of freedom for a given frequency and the average energy per degree of freedom. The concept of degrees of freedom is explained as the number of variables that can be varied in the formula and cannot be reduced through mathematical means. The conversation also clarifies that the degrees of freedom refer ...

  7. Degrees of freedom of a diatomic molecule - Physics Forums

    www.physicsforums.com/threads/degrees-of-freedom-of-a-diatomic-molecule.942293

    There are 5 or 7 quadratic degrees of freedom for a diatomic molecule: at room temperature, 3 for translation and 2 for rotations; at higher temperatures, when there is non-negligible vibrational excitation, one needs to add 2 degrees of freedom for the vibration of the bond (counting for 2 due to its harmonic-oscillator-like behaviour).

  8. What is the Degree of Freedom of a System? - Physics Forums

    www.physicsforums.com/threads/what-is-the-degree-of-freedom-of-a-system.517008

    So it looks like the answer is 4DOF. From page 15 of the book: "degrees of freedom of the system. This is defined as: The number of independent coordinates (not including time) required to specify completely the position of each and every particle or component part of the system." Now we both know %^) Jul 29, 2011.

  9. Dimensions vs. degrees of freedom - Physics Forums

    www.physicsforums.com/threads/dimensions-vs-degrees-of-freedom.1016907

    In summary, dimensions and degrees of freedom are not the same thing. While they may have a similar analogy as shapes and dimensions, they are distinct concepts. In a 3D mechanics context, objects can have 6 degrees of freedom, which is not the same as the 3 dimensions of space. The configuration space can have a different number of dimensions ...

  10. Degree of Freedom Formula for Molecules with n Atoms - Physics...

    www.physicsforums.com/threads/degree-of-freedom-formula-for-molecules-with-n...

    1. What is the degree of freedom formula for molecules with n atoms? The degree of freedom formula for molecules with n atoms is given by 3n - 6, where n is the number of atoms in the molecule. This formula is used to calculate the total number of possible ways the atoms in a molecule can vibrate or move. 2. How is the degree of freedom formula ...

  11. What is the degrees of freedom of helium gas - Physics Forums

    www.physicsforums.com/threads/what-is-the-degrees-of-freedom-of-helium-gas.388459

    The degrees of freedom for helium gas can be calculated using the formula f = 3N - r, where N is the total number of particles (atoms or molecules) in the gas and r is the number of constraints or restrictions on the particles' movement. In the case of helium gas, since it is a monatomic gas with no intermolecular forces, the value of r is zero ...