The fundamental frequency of a pipe that is open at both ends is 584 HzHz. Part A How long is this pipe

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.

C. it comes from the core of the earth.