Two vertical wires are suspended at a distance of 500mm apart Their upper ends are firmly secured and their lower ends support a rigid horizontal bar, which carries a load of 200N. The left hand wire has a diameter of 1.6mm and is made of copper, and the right hand wire has a diameter of 0.9 mm and is made of steel. Both wires, initially, are 4.5 meters long. Determine:(a) position of the line of action of the load, if both the wires extend by the same amount. (b) slope of the rigid wire, if the load is hung at the centre of the bar. Neglect weight of the bar. Take E for copper as 100 GPa and E for steel as 200 GPa.
(a) you know that if the two wires extend the same amount then they are under the same strains. you also know that the sum of the two tensile forces in copper and steel wires have to equal 200N. using this information, you can equate the two strains by saying stress/E for steel stress/E for copper. for simply axially loaded wires, the stress is simply the tensile force/cross sectional area. since the sum of the tensile forces have to be 200N, you can substitute and solve for one tensile force, and then the other. knowing the magnitudes of the two tensile forces, draw a FBD for the horizontal bar. sum moments about the point of application of the 200N load, this will give you the distance from one of the two ends of the bar. (b)if you sum moments about the center of the bar, you can show that the tensile force in each of the two wires are both 100N. use this to calculate the stress in each wire, which can then be used to calculate the elongation of each wire. from here, its simple geometry. subtract the two elongations to find the total difference in height between the two ends of the bar, and then divide by the length of the bar to get a slope.
SOLDER a 3/4 male adapter on the copper then attach your fitting, or call a plumber to do it for you most flex pipes that come with water heaters or purchased seperatly have 3/4 female threads on them, they may have a slide on connector you tighten on an existing pipe, but they never worked for me when i installed them, soldering is the best solution for you (unfortunately i know)
Typically all water heaters are fitted with 3/4 nipples and fittings,from what I can gather you are talking about a flex hose supply line. On the inside of each end will be a neoprene washer or rubber washer,when you say still spinning it sounds as if this may be missing. Also use pipe dope as oppsed to teflon, Hope you get this solved, if all else fails take a piece you are connecting to, with you to the hardware store
3 4 Copper Compression Fittings
