One of your colleague says that she listened almost something about the ERM approach and inquires you in case you know anything around it. you reply with

How many cells are our body made of ? ♡

Wich organism obtains its energy from dead or decaying matter

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