How many feet of copper wire 1/8 inches in diameter can be made from 1 cu. ft. of copper?given; pi=3.14; 1 cu. ft.= 7.5 gallons; 1 gal= 231 cu. inchesI figured 1 cu. ft.=1732.5 cu.in.Any help would be greatly appreciated.
copper wires are cylindrical in shape and we know the volume of a cylinder is v = pi * r^2 * l where r is the radius and l is the length now given v = 1 cu ft, r = diameter/2 = 1/(8*2) in = 1/(8*12*2) ft = 1/192 ft so put the values 1 = pi * [1/192]^2 * l l = 192^192/pi so I almost did the whole thing. You just use your calculator.
For frequencies up to about 100 megahertz, any kind of wire will work, but it will not look very professional if you use, multi conductor cable with all the conductors connected at both ends. Over 100 feet between supports, it may not be strong enough in a high wind. Above about 100 megahertz 1/4 inch steel wire may work well if it is copper plated = most of the current travels near the surface = skin effect. The antenna wire is possibly hard drawn for extra strength. The cable between the radio and the antenna needs to good quality if this is a long distance, even at less than 100 megahertz Neil
