Talk:Cylinder (geometry)

strength

hello, i was wondering how strong a cylinder can be? if possible contact meon mye-mail adress

thank you

Its not a good idea to put your email up here, so I removed it. 68.6.112.70 18:26, 10 May 2006 (UTC)

If you want us to contact you, allow email from other Wikipedians and sign your posts like this- ~~~~. Lunakeet 12:12, 9 May 2008 (UTC)

Is this the geometric cylinder?

Correct me if I'm wrong, but this doesn't seem to talk much about the cylinder as a solid; instead it seems to look mostly at the cylinder as a Cartesian equation, which is more mathematical than anything else (or at least to me). Does anyone else agree? --JB Adder | Talk 01:06, August 4, 2005 (UTC)

I agree, this page isn't very complete. You can help! 68.6.112.70 18:26, 10 May 2006 (UTC)

This one may not cylinder in geometry commons, this is only cylinder (quadric). How about the extended concept? Newone 06:32, 16 September 2007 (UTC)

Surface area and volume of part of a sphere

I would be interested in seeing the integrals needed to find the surface area and volume of part of a sphere. This should come out of a derivation for the integrals needed to find the surface area and volume of part of a sphere. 68.6.112.70 18:26, 10 May 2006 (UTC)

Ratchets with cylindrically notched teeth

I was hoping to find some information on the mechanical properties of a ratchet with 'sawtooth' notched teeth as opposed to those having sinusoidal notches (like those that a series of cylinders would fit into).

where is z?

In the formula provided,okay $\left(\frac{x}{a}\right)^2 + \left(\frac{y}{b}\right)^2 = 1$, where is the information about the height of the zylinder "hidden" (that is, where is the z-axis)? Generally, the article Cartesian equation misses to explain how to understand these equations. --Abdull 07:52, 29 May 2006 (UTC)

• It means that z can be anything. The equation describes the surface of an infinitely long cylinder around the z-axis CuriousOliver 19:50, 17 July 2006 (UTC)

finding out the volume of a cylinder with un equal radius

finding out the volume of a cylinder with un equal radius —Preceding unsigned comment added by 117.192.165.48 (talk) 18:47, 20 April 2010 (UTC)

What is the volume of a section, when a plane intersect the cylinder through the bases, along his length? —Preceding unsigned comment added by 188.131.71.205 (talk) 15:15, 21 July 2010 (UTC) hi i want to know how to calculate the volume of a cylinder. i do not understand the given formula contact me @ www.moshimonsters.com/zeduleika —Preceding unsigned comment added by 173.35.224.172 (talk) 02:12, 4 November 2010 (UTC)

typo?

Hi, are you sure

   =\int_{0}^{h} A(y)^2 \, dy

is right, shouldn't it be

   =\int_{0}^{h} A(y) \, dy

without the square?

Pi

So, no one else has noticed that all the equations are missing pi. Is there any reason for this? — Preceding unsigned comment added by 216.200.101.146 (talk) 19:34, 10 February 2012 (UTC)