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  1. Learn How to Solve the Cubic Equation for Dummies

    Oct 2, 2016 · Everybody learns the “quadratic formula” for solving equations of the form A x 2 + B x + C = 0, even though you don’t really need such a formula, because you can solve for x through the …

  2. Finding the wavelength from the work function in photoemission

    Apr 27, 2012 · Homework Statement a) Write down the formula that relates the maximum electron energy, Emax. to the frequency of the incident light in the photoelectric effect. b) Calculate the …

  3. The Difference Between Functions And Equations? - Physics Forums

    Aug 10, 2009 · Hello there my fellow complex number comrades, I was just wondering, what are the key differences between a function and an equation?

  4. Find C in general sine function - Physics Forums

    Jan 26, 2011 · Hello All, I am just wondering how to find c in the sine function (y=asinb(x-c)+d). I understand wat the values mean and how to find a b and d but c i am not to sure how to find unless …

  5. Interchanging x and y for inverse function • Physics Forums

    Apr 3, 2023 · For this, Why are we allowed to interchange x and y? Is it because the equation will still be true? Many thanks!

  6. How Can Gravity Be Expressed as a Function of Density?

    Aug 12, 2011 · Hi, I'm just playing a bit with the numbers... The gravitational strength of a planet really depends on its density, but I'm wondering how I'm supposed to create a formula where gravity is the …

  7. But since the Schroedinger equation is a linear, second-order, ordinary differential equation, it has a unique solution, given the value of the function and its derivative at the same point. But if the solution …

  8. Computing the Riemann Zeta Function Using Fourier Series

    Apr 9, 2021 · Equation 3: This post is an attempt to show how you can derive that result, and related results, using facts about trigonometry, complex numbers, and the Fourier series.

  9. Power Formula: Frequency & Electrical Power Explained - Physics Forums

    Mar 6, 2015 · We all know that the electrical power = V * I * cos Q. and I know how this formula is derived. but yet intuitively I was expecting to see the frequency in the formula. I just need intuitive …

  10. Green's function for Helmholtz Equation - Physics Forums

    Jan 11, 2012 · Homework Statement Arfken & Weber 9.7.2 - Show that \\frac{exp(ik|r_{1}-r_{2}|)}{4\\pi |r_{1}-r_{2}|} satisfies the two appropriate criteria and therefore is a Green's function for the …