A friend of mine gave me a used Mac Pro he found. Everything works fine except it has one of those annoying cable locks clamped on the back. He said he took bolt cutters to the cable to try and shorten it, but the lock part and a few inches of cable remain. I tried pulling on it and twisting it, but nothing works. I can't see a brand name on it, but its a combination type.
Co2 is carbon dioxide,which puts out most fires which do not have their own oxygen supply. and since it is a gas and not liquid it is safe for electrical. I would just be careful for liquid fuel since the force of the gas coming out can spread the liquid. IE a chip pan fire, with hot oil spraying you can be injured or spread the fire if not thinking, as in turning off the heat source. but the best in a car or home, a as long as you remember that also you need oxygen as well as the fire, so tackle and get out fast before you collapse, leave the real fires to the fire brigade. you endanger yours and their life's. If you are still not sure ask your local fire station they will help you understand
The Darcy equation is : Head loss fLV^2/ 2dg For fittings : head loss KV^2/2g If you have no friction , the head loss in pipe is negligible but it also depends on the type of flow , laminar or turbulent, turbulent flow will have more losses ! Then the only loss left out is fittings loss and that will be the major loss in the piping for example losses through valves, nozzles, tees, bends etc.
