Recent content by EngnrMatt

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    Finding Charge p.u.l. Along Infinitely Long Cylinder

    I actually figured it out on my own finally. Thanks for your time though.
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    Finding Charge p.u.l. Along Infinitely Long Cylinder

    ρ*dr I think?
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    Finding Charge p.u.l. Along Infinitely Long Cylinder

    Homework Statement An infinitely long cylinder of radius a in free space is charged with a volume charge density ρ(r) = ρ0*(a-r)/a (0 ≤ r ≤ a), where ρ0 is a constant and r the radial distance from the cylindrical axis. Find the charge per unit length of the cylinder. Homework Equations...
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    Applied directional derivative problem

    Homework Statement The temperature at a point (x,y,z) is given by T(x,y,z)=200e^[−x^(2)−y^(2)/4−z^(2)/9], where T is measured in degrees celsius and x,y, and z in meters. Find the rate of change of the temperature at the point (0, -1, -1) in the direction toward the point (-2, 1...
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    Finding Parallel Tangent Planes on a Surface

    Alright, I got it. Thank you very much!
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    Finding Parallel Tangent Planes on a Surface

    Homework Statement Find the points on the surface \(4 x^2 + 2 y^2 + 4 z^2 = 1\) at which the tangent plane is parallel to the plane \(4 x - 3 y - 2 z = 0\). Homework Equations Not sure The Attempt at a Solution What I did was take the gradient of both functions, the surface...
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    Source transformations: confusing problem wording

    Homework Statement A certain practical dc voltage source can provide a current of 10.5 A when it is (momentarily) short- circuited, and can provide of 30 W to a 20 Ω load. Find the open-circuit voltage Homework Equations V=IR The Attempt at a Solution Well I'm pretty sure that...
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    Equations of Lines/Multivariable Calculus

    Yep, you're right, thanks! It worked.
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    Equations of Lines/Multivariable Calculus

    Homework Statement Determine whether the lines L1:x=t, y=16+4t ,z=8+t and L2:x=−7+2t, y=−8+6t, z=−3+4t intersect, are skew, or are parallel. If they intersect, determine the point of intersection Homework Equations t = -7 + 2s 16 + 4t = -8 + 6s 8 + t = -3 + 4s The Attempt...
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    Engineering Basic Circuit Problem: Find Req, v1, v2, i4

    Definitely not, considering this is the homework for just day 3 of circuits 1.
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    Engineering Basic Circuit Problem: Find Req, v1, v2, i4

    28.373 ohms
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    Engineering Basic Circuit Problem: Find Req, v1, v2, i4

    Okay, well I'm not sure how to handle it at that point then. I did everything the same as before, only with 100 in parallel, but that didn't seem to work, so I'm all out of ideas.
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    Engineering Basic Circuit Problem: Find Req, v1, v2, i4

    First I combine R3 and R4 (290+90) which gives 380. Then I combine that with its parallel R2 (190) which gives 1/[(1/380)+(1/190)] = 126.66, then I add that to R1 (64) which gives 190.66, then combine it with its parallel (50), giving 39.612, which I then add to the last resistor, 100, to get...
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    Engineering Basic Circuit Problem: Find Req, v1, v2, i4

    Homework Statement In the circuit below, VS = 65 V, R1 = 64 Ω, R2 = 190 Ω, R3 = 90 Ω, R4 = 290 Ω. Find: (a) The equivalent resistance (Req) at the dashed line (b) v1 (c) v2 (d) i4 Homework Equations The Attempt at a Solution I found the equivalent...
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    KVL loop: Example wrong, or did I misunderstand?

    In my circuit analysis textbook, there is an example problem using a KVL loop. Though it seems relatively simple, I cannot understand the answer. the loop consists of 3 voltages: -8, 12, and the unknown, Vr2. The polarities (clockwise) around the loop are respectively +,-,+. The answer...