This phenomenon is known as a shock wave. Shock waves are also produced if the aircraft moves faster than the speed of sound. If a moving source of sound moves faster than sound, the source will always be ahead of the waves that it produces.
Plus, few majors can guarantee a financial return that will offset the financial debt many students will accumulate during college. Two-year degrees, of which an associate degree is the most common, provide training and education for a variety of fields in approximately half the time as a bachelor's degree. Plus, you can earn an associate degree from a local community college for a fraction of the cost of a four-year degree at a university. Also, for most areas of study, an associate degree puts you halfway toward a four-year degree should you decide to pursue one at a later time.
Engineering and medical colleges provide four- and five-year degree programs respectively for bachelor's degrees (BE, B.Sc.Eng., B.Arch., B.Tech. (Hons) and M.B.B.S) that also begin after secondary school year 12. The Bachelor of Architecture (B.Arch.) degree program is of five to six years' duration.