An oil leak from an underwater pipeline floats on the surfac…

An oil leak from an underwater pipeline floats on the surface of the water forming a circle.  If the radius increases at a constant rate of 3 miles per hour, how fast is the area of the oil increasing when the radius is 5 miles wide?  State your answer rounded to one decimal place.

 In the figure, two parallel wires carry currents in opposit…

 In the figure, two parallel wires carry currents in opposite directions. A rectangular loop is midway between the wires. The currents are decreasing with time. The induced current through the resistor R is  ______________. Select the response that best completes the sentence.