You repeated yourself in that post. We're still waiting for the answers to our questions. We can't do anything until those answers are forthcoming. Sorry.I did just that in post #19.
Well, if that's all they've given you, so there really is no definition for "r", then there really is no way to answer this question.I was asked, "Please reply with...":
a. "...the full and exact text of the original exercise, the complete instructions"
I answered with with the full and exact text of the original exercise, the complete instructions: "Circle 2 is twice the area of circle 1. Show that the quadratic mean of all the values of r of circle 1, is equal to the radius of circle 2."
I can find no reference online (other than this thread) for "concentric elementary zone", let alone how it relates to "dr" (which is a differential, maybe?). Providing the definition of this phrase, along with whatever other "understood" and otherwise supplementary material is required, might go a long way toward our being able to figure out what you're talking about.I don't know if restating what I indicated before will help, but it is my understanding that r is the distance from the center of a concentric elementary zone (dr, for example).
I don't know if restating what I indicated before will help, but it is my understanding that r is the distance from the center of a concentric elementary zone (dr, for example).
I don't see any reference to concentricity in Post 19Post - 19
Circle 2 is twice the area of circle 1. Show that the quadratic mean of all the values of r of circle 1, is equal to the radius of circle 2.
I have found that the relation between the radius of a circle that is twice the area of another is that the radius of the larger circle is equal to the radius of the smaller circle multiplied by square root of 2. Therefore, the result of the quadratic mean calculation must be radius of circle 1 multiplied by square root of 2. Using this information to work backwards, y must be r1 multiplied by square root of 6 (or r1 multiplied by square root of 2π). However, I do not believe the exercise is to work it backwards, but to find the correct relationship to deduce y.
Circle 1 has radius r
Circle 2 has radius R
Circle 1 is three times bigger than Circle 2
Show that the Quadratic Mean of the radii of all circles smaller than Circle 1 equals R
I sure did. Fixed now, thanks.… in your final quadratic mean, you forgot r …
You begin by using the Manage Attachments button. On the resulting pop-up window, you click the Add Files button. That causes another pop-up window (which defaults to using your computer as the image source, instead of the web), and this window contains both the Choose File and Upload buttons. It's also explained in the FAQ. :cool:I tried to attach a drawing I made with Paint as to what I mean about concentric elements. It let me choose what file to upload, but there was no "OK", or "Continue" or "Upload" or anything to complete the attach.