Lucky for us, the average salaries of UK jobs are revealed annually by those helpful number-crunching pixies at the Office of National Statistics. The survey of a whopping 21,563,000 people's earnings will either delight or depress you depending on what end of the scale you see yourself in the next five years.
This is what is called transverse and longitudinal waves. The difference between transverse and longitudinal waves is the direction in which the waves shake. If the wave shakes perpendicular to the movement direction, it's a transverse wave, if it shakes in the movement direction, then it's a longitudinal wave. [Transverse Wave] It is easy to imagine a transverse wave. The waves of the ocean and the waves transmitted from a tightened rope when shaken are transverse waves.
Transverse waves-Waves for which the matter in the medium moves back and forth at right angles to the direction the wave travels; has crests and troughs. Trough-The lowest points on a transverse wave.