3. Jacob throws a bouncy ball (0.75kg) at Caroline with a speed of 3.1m/s. Caroline throws her heavier bouncy ball (2.5kg) towards Jacob. The bouncy balls collide in the air and travel in opposite directions, each ball has a speed of
2.0m/s. What was the initial speed of Caroline's ball? [G][0][E][S][S]

Wind or electric energy force force of friction

A. to determine if humans can explore mars safely

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.

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.