Two ice skaters are at rest, Abby and Ben. Abby has a mass of 52.5 kg. They push off each other. After, Abby moves 1.59 m/s east, while Ben moves 1.22 m/s west. What is Ben's mass? Please help, I am failing Physics and I really need assistance with my work!!

B) as the temperature increases, the kinetic energy of the particles increases.|-/

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.

  the answer is don't know.