The primary coil of a transformer has 180 turns more than the number of turns of the secondary coil. An output voltage of 18v is obtained when the input voltage is 45v. Calculate the number of turns in the secondary coil.

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.