When the string of guitar is plucked, it produces a characteristic sound. The vibrations of the string push the air around it and result in vibrations of the air particles, and these vibrations propagate through the medium (air) away from the wire. This is a sound wave that propagates all the way to your ear. We thus have two different waves involved in the process: the sound waves and the waves in the wire. These two waves have the same:

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

As newton's first law states a object in motion stays in motion