Needing A Few Pointers (Me)

Hey everyone! Been playing with AutoCAD2010 (Student) for a week or so now and this is my first post. If what I am asking is not clear or asking too much please just let me know. Thanks.

1. How can I merge two cylinders into one object? (Thinking this may have to be the second thing I do.)

2. How do I make the smaller cylinder transparent so that a portion of the "new merged cylinder" appears to be partially hollow?

3. Is there a way to make a sphere, grab it, slice it in half, and separate the pieces?

The following is the order of things I have been trying out

to make it easier on me:

I made a 3D cylinder the right dimensions, moved it around and examined it from different views to get a feel of my new object. I put this object in a layer with -layer new "Outside Cylinder" and changed the color to blue.

Made a second one with smaller dimensions to go inside the first one. Labeled that one "Inside Cylinder" and changed it to red for now.

I made a third layer called "space" which is where I want to place the "merged" object. This is what I want to be my "main drawing board" for lack of a better term.

Thanks to all those that at least read my entire post.

Thanks to whoever moved my post. I guess these aren't newbie questions lol. Since it's my first post I felt better safe then sorry.

Welcome aboard. Acad2010 is a new beast that I havent really had the time to use yet. There are a few new features that let you approach modeling a few different ways.

The more conventional way of what your asking. Both objects you are asking about could be done with the REVOLVE command. Basically you draw a section view of what you want and revolve it around an axis of revolution to obtain your solid. For something like your dome or the cylinder, these types of objects are perfect for the revolve command. I suspect if you go into the Help document and bring up REVOLVE it will give you some more insight with a few pictures.

There are also commands like SUBTRACT, UNION, INTERSECT that are standard boolean operations. You can take two intersecting solids and subtract one from the other, join them(union) or keep what parts of their bodies intersect.

hope these get you started in the right direction

Thanks for your help so far I'll look into that method for now. I really appreciate the help.