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Why Does i^2 Equal -1? Explained - Physics Forums I see many people saying that the imaginary number squared is -1, like so: i = sqrt (-1) i2 = sqrt (-1)*sqrt (-1) = (sqrt (-1))2 = -1 But, what about this
I understanding the formula Power loss= I^2 R - Physics Forums The power loss is given by I ^2 R where I is the current and R is the resitance I know why these variables are in this equation V = I R P = I V therefore, P = I² R What I don't understand is the practical explanations for this Why are there two current variables? Are there two
When to use P=I^2R, P=VI, P=V^2 R? • Physics Forums P=I^2R is primarily used to calculate heat loss in a circuit, while P=VI and P=V^2 R can also be used depending on the available variables To find power generated by a DC voltage source, multiply the voltage by the current, and for heat dissipation, use the current squared multiplied by internal resistance These formulas are interrelated, allowing for flexibility in calculations based on
Polarization I = Io*cos^2 theta - Physics Forums Two polarizers are oriented at 38 8o to each other and plane-polarized light is incident on them If only 14 6 percent of the light gets through both of them, what was the initial polarization direction of the incident light? Ok, I'm not exactly sure what this problem is asking for, do they
I can no longer render LaTeX | Page 2 • Physics Forums I have a couple of freelance Xenforo devs working on this and struggling with the new editor Xenforo 2 4 (out in a few months) will switch to yet another editor Maybe that is a good thing @PeroKI would love your support as a programmer Please DM me and it would be great for you to have a look Thanks!!
Force on roll of paper - length of paper that unrolls - Physics Forums The radius of the roll of paper is 7 6 cm and its moment of inertia is I = 2 9 10^-3 kg · m2 A force of 3 2 N is exerted on the end of the roll for 1 3 s, but the paper does not tear so it begins to unroll A constant friction torque of 0 11 m · N is exerted on the roll which gradually brings
Laurent series representation of f (z)= (z-1) (z-2) at z=i Homework Statement Find the Laurent series representation for f(z)=(z-1) (z-2) at z=i Homework Equations NA The Attempt at a Solution I have taken multiple derivatives but I keep getting stuck at what to do after I find my representation of my nth derrivative PLEASE HELP