When a mechanical, such as sound, reflects off a surface, what can the reflected wave tell you about the surface?

It is believed that europa, one of jupiter’s moons has an ocean beneath its surface. based on how earth’s oceans and atmosphere are believed to have formed, what can be said about europa’s supposed ocean? the arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced , similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s .

Which of these is not a nucleotide base found in dna?

The wind is to parities grasses because it them