Recent content by ENGR_student

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    Solving Equations of Complex Numbers

    Homework Statement Show that (1+i) is a root of the equation z4=-4 and find the other roots in the form a+bi where (a) and (b) are real.Homework Equations Using De Moivre's Theorem zn=[rn,nθ] Modulus(absolute value of z) = 4 Argument = ? The Attempt at a Solution r4=4 → r = (4)^(1/5)...
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    Solving Complex Expressions: 1/z^2 & 1/z^3

    Oh thank you! I apologize if I put it in the wrong thread!
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    Solving Complex Expressions: 1/z^2 & 1/z^3

    Hello I'm studying complex numbers for class and the question is stated as: Let z=1+2i Find: a) 1/z^2 b) 1/z^3 I was thinking just to multiply by the conjugate (1-2i)^2 for (a) and similarly for (b). Would that be correct in solving it?
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    Calculate force in english units

    i understand that..but in the solutions. the equation was F - 20 = (20/32.2)(60) F=57 They took 20 on the left side to automatically be lbf even though it was originally lbm
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    Calculate force in english units

    Homework Statement Determine the force necessary to accelerate a mass of 20 lbm at a rate of 60 ft/s^2 vertically upward.Homework Equations How do you properly account for weight? What exactly is pound force? How do you go from pound mass (lbm) to pound force (lbf)? The Attempt at a Solution F...
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    How do you calculate pressure using english units?

    Homework Statement The reading on a mercury manometer at 25 degrees Celsius (open to the atmosphere at one end) is 25.62 inches. The local acceleration of gravity is 32.243(ft)(s^2) Atmospheric pressure is 29.86 (in Hg). What is the absolute pressure in psia being measured? The density of...