From west to east the six standard time zones in Europe are: (UTC/GMT -1) Azores Time Zone. (UTC/GMT +0) Greenwich Mean Time Zone, Western European Time Zone and Irish Time Zone. (UTC/GMT +1) Central European Time Zone.
Mechanical waves transport energy. This energy propagates in the same direction as the wave. Any kind of wave (mechanical or electromagnetic) has a certain energy. Mechanical waves can be produced only in media which possess elasticity and inertia. A mechanical wave requires an initial energy input. Once this initial energy is added, the wave travels through the medium until all its energy is transferred. In contrast, electromagnetic waves require no medium, but can still travel through one.
A mechanical wave is a vibration in matter that transfers energy through a material. Mechanical waves have peaks and troughs, frequencies, and wavelengths. Frequency is the number of waves per second, and wavelength is the distance from one peak to the next. A mechanical wave is created by putting energy into it.