ABSTRACT
Engineering is all about problem solving and many problems in engineering can be solved using integral calculus. One important application is to find the area bounded by a curve; often such an area can have a physical significance like the work done by a motor, or the distance travelled by a vehicle. Electrical currents and voltages often vary with time and engineers may wish to know the average or mean value of such a current or voltage over some particular time interval. An associated quantity is the root mean square (RMS) value of a current which is used, for example, in the calculation of the power dissipated by a resistor. Mean and RMS values are required with alternating currents and voltages and pressure of sound waves. Revolving a plane figure about an axis generates a volume, called a solid of revolution, and integration may be used to calculate such a volume.
