A cable hangs between two poles that are 70-ft apart. The two poles are both 40 foot high. Sag is observed in the middle of the cable 5 ft from the ground. Find the length of the cable. What is the working equation for a catenary forming cable? What is the computed constant a up to 4 decimal places? What is the catenary equation for the given problem? What is the general equation for length of the cable S?

Find the intensity of light at a depth of 12 meter if I0=14 and k=0.7. Round to two decimals.

Solve the following exercises based on Principles 18 through 21, although an exercise may require the application of two or more of any of the principles. Where necessary, round linear answers in inches to 3 decimal places and millimeters to 2 decimal places. Round angular answers in decimal degrees to 2 decimal places and degrees and minutes to the nearest minute. Three posts are mounted on the fixture shown. Each post is tangent tothe arc made by the 0.650-inch radius. Determine (a) dimension A and(b) dimension B. Note: The fixture is symmetrical (identical) on each side of the horizontalcenterline ( CL ). All dimensions are in inches.

Two wires tether a balloon to the ground, as shown. How high is the balloon above the ground?