Recent content by ex81

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    What is the vector perpendicular to the surface given by z = Ax + By + C?

    [Q] Find the integral that represents the flux of the vector F = <x^2z, x^z, x^2z> through the surface S given by z = Ax + By + C for 0 <= x <= a and 0 <= y <= a, where A, B, C, and a are positive constants. From what I remember of the Flux. F dot n, where n is a a vector perpendicular to the...
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    Calculating Electric Force of a Point Charge on a Charged Particle Thread

    That is correct, there were 5 possible answers but they all had 90k integral 0to7 My answer was correct. :-) How my professor proceeded. Given: Lambda =5c/m Aofx =0, Bofx =, q = 6c, xp =3, yp=0, zp=2, y=3x^2, y=y(x), dy(x)/dx = 6c Fqy = 5kq integral 0to7...
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    Calculating Electric Force of a Point Charge on a Charged Particle Thread

    I'm assuming you are using using U = kqq/r for the potential electro static equation. It isn't in my text, and I just saw that in another related post.
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    Calculating Electric Force of a Point Charge on a Charged Particle Thread

    Not sure how I would calculate that atm. My brain is a bit mush. But that does explain a bit of the sign issue I was having with this. I figured it should be negative, but I was just not seeing where it was coming from. The r value should look something like ([x-3]^2+[3x^2]^2+[2^2])...
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    Calculating Electric Force of a Point Charge on a Charged Particle Thread

    Wow I was tired when I posted that. Starting from the basic force equation. F = k Qq / r^2 F = k(6) (the tiny cumulative charge as we go across the integral) /(change in distance) ^2 F= 6(5)k(3x^2(1+36x^2)^(1/2))÷(r^2) F= 90k(x^2(1+36x^2)^(1/2))÷(r^2)
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    Calculating Electric Force of a Point Charge on a Charged Particle Thread

    Charged Particle thread with linear charge force Homework Statement A uniformly charged thread with linear charge density 5 C/m lies along the curve y = (3/m) x^2 for 0≤x7m. The y component of the electric force it exerts on a 6 C point charge located at (3m, 0m, 2m) is given by...
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    Two objects, and where they meet

    @jack per the question I actually have to be given that to use it, or the answer is not correct. The whole if your method does not match it is not correct issue. @phoenix The worker starts at x, which happens to be zero, and the box starts at x b. They meet at xf, and x box final(the same...
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    Two objects, and where they meet

    fun mass calculations I know the force on the person, and block is the same but I do not know the mass, or ratio of mass. So the closest I can get to knowing the constant accelerations is a = F/mworker/block depending on which mass is used. While I know about the center of mass, it isn't...
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    Two objects, and where they meet

    Homework Statement A worker with a mass of Mw is pulling on a mass-less rope that is attached to a box with a mass of mb on a friction-less surface. The worker pulls with a constant force starting at rest. The Worker is at x = 0, and the box is at xb Find the position at which they meet in...
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    Finding Prime numbers using Euler's formula

    Thank you Office_Shredder for restating what I already knew, AND answering my issue: " I full well know what a prime number is, and how I would generate them BUT my professor said here you go, and you have to use it without explaining that equation. Having NEVER seen, nor heard of Euler before...
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    Finding Prime numbers using Euler's formula

    @Scurty That means absolutely nothing to me. I don't have any clue how f(n) = n^s + n + 41 gives me anything useful. @lurflurf The problem is I have no clue how, or what f(n) = n^2 + n + 41 is supposed to do anything. That is my issue. Based on your answer i am to monkey with the quadratic...
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    Finding Prime numbers using Euler's formula

    Some of it but how is is f(n) = n^2 + n + 41 supposed to tell me that it is a prime number?
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    Finding Prime numbers using Euler's formula

    1)my assignment as posted: "Hash Table Want it your way? Now's your chance! Instead of me assigning predefined header files, prototypes and whatnot, I'm going to give you the opportunity to design and implement a solution to a problem entirely on your own. All you have to do is design and...
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    Finding Prime numbers using Euler's formula

    Homework Statement use Eular's formula to find the greatest prime number under : If I wasn't forced to use this method I would set up a program to loop through checking for primes Homework Equations F(n) = n^2 + n + 41(0 to 39) or depending on your PoV f(n) = n^2 - n + 41(1 to...
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    Area of overlapping polar coordinates

    Thanks, so I did make at least one mistake :-D
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