I'm in plumbing school (second year) and after we finish building plans, DWV piping will be next. I was reading up on joining methods (or trying to) and I wanted to know how to recognize the methods needed and how to do them. It would be nice to find a guide but there were none online. For instance, on DWV piping, if your running 3 inch cast iron and its threaded, do you join it like every kind of threaded pipe, with plumbing tape and hand tightening? Or is there a different method? Also things like welding cast iron pipe togther probably isnt common (and I don't think it would be acceptable on already existing, but what about new?). A guide would be nice, they only supply the most common way of joining each pipe for about a page. Thanks guys
Yahoo Answers suggests, based on the content of the message, where to put the question. This kid didn't notice. I'd say stop using longboards. They're for chumps.
OK first thing is that the gravity's pull of sun on moon is not twice that of the pull on earth, its just a bit more not TOO MUCH that it will pull it away. However to understand this Consider the empty Space as a very elastic fabric of a trampoline the size of a football stadium and now put a bowling ball on that fabric, that ball will bend the fabric at a given place where it stays while the rest of the area is somewhat planar, now take a small marble and just let it roll towards the ball, you will notice that the small marble spins around the large object (bowling ball) and eventually crashes into the ball. Now imagine a 2 times larger bowling ball about 10 feet away from the first one, now you will see that in spite of being twice the size of the first one it will not be able to pull out that small marble, considering that even if it was so heavy that it was able to pull the marble towards itself it would have to pull in earth along with it as well. Now ever since Earth had it's moon which was actually a collision that ripped half of earth apart, the moon has been moving away from earth, but this is not because of the sun's gravity.
Is it safe? People who broke laws like that probably wouldn't say that doing so was safe. There were lots of physical, psychological, and social consequences, even if they were sure they were right and doing the right thing. The bigger question is if you're so sure of yourself and what you're standing for that the unsafe things are worth it.
