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  1. G

    Electromagnetic Waves

    -Why do electromagnetic waves not readily penetrate metals? Also a question occurred in class, and they asked -"The sun emits most of its electromagnetic wave energy in the visible region of the spectrum with the peak in the yellow-green. Our eyes are sensitive to the same range, with peak...
  2. G

    Cable Tensions at points, help.

    Homework Statement Compute the cable tension at the midpoint, (L/2), the quarterpoint (L/4), and support for a 1600 foot span with a sag at the midpoint of 100 feet, when the cable is loaded with 10 kips/foot spread uniformly along the horizontal line. Homework Equations The...