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How to Calculate Circumference [Perimeter] of a Pipe [Cylinder shape] with Specified Pitch?
Actually I want to find the length of thread to wind a pipe.
Is there any formula or formula name I can refer?
What you are looking for is the perimeter of an ellipse which is rather an ugly thing (see: http://www.mathsisfun.com/geometry/ellipse-perimeter.html). Your minor axis is the diameter of the pipe. The major axis is the hypotenuse of the right triangle formed from 1/2 of your pitch.
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Suppose I have a curve in xy coordinate system and I know the function of the curve is y=x^2. How could I map this curve to a new uv coordinate system and it should be a straight line (y=c1).
I searched that I could use Jacobian determinant to do this job but I don't know how to find the components of the transformation. (x(u,v),y(u,v))
u=x, v=y-x²
does the job. Is there an extended question behind?
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I want to understand the physical significance of n raise to some decimal power.
Like when i say 2^5. I understand that it means 2 multiplied 5 times. But how do i analyse 2^0.1.
Please suggest.
2^0.1 is the tenth root of 2. For rational powers, x^(p/q)=(x^p)^(1/q) is a combination of powers and roots.
For general real numbers,
x^y = exp(log(x)*y).
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((A*55)/(A+1815))+4=B
eg.:
((1000*55)/(1000+1815))+4=23.53819
How can i calculate from
23.53819 1000?
A and B are variables.
Sry for my bad english ;)
Thanks any help!
Just follow the steps described before. The goal is to manipulate the expression to get all terms containing the variable to be solved for on one side.
You Have to First do what ever present in Brackets then Division, Multiplication and then Addition and Subtraction.
For any equation you have to follow the sequence.
Hope this helps
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By using Sci-lab I need to draw triangle cicrle and rectangular (separately, of course). the most difficult for me is triangle, I have no idea how to plot them
Plotting is rather trivial. See the plot command reference.
There are shorter ways, but for easiest understanding just plot the three sides as three lines.
For instance if you have a triangle with the corner coordinates at (x,y) = [0,0],[5,10],[10,0]. Plot three lines between these points.
plot([0,5],[0,10])
plot([5,10],[10,0])
plot([0,10],[0,0])
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I have found this formula for computing Pi value:
But I need to compute only(for example - 1000th) number of Pi value. How I can do it with provided formula?
Thanks.
What you want is called a "spigot algorithm". Take a look at [1] in the section "BBP digit-extraction algorithm for pi". Good luck and have fun.
[1] http://en.wikipedia.org/wiki/Bailey%E2%80%93Borwein%E2%80%93Plouffe_formula