Doppler effect- Description

Hello, There!

The Doppler effect,, describes the changes in frequency of any kind of sound or light wave produced by a moving source with respect to an observer.

Explanation:

Waves emitted by an object traveling toward an observer get compressed — prompting a higher frequency — as the source approaches the observer

Hope this Helps!

multiply 2kg by latent heat of vap

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.