How far are two protons if they exert a force of 5.0 on each other

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

28. how many linkage groups will be formed by homogametic organism with 28 chromosomes?

As scientist had investigated evolution from a variety fields they have found