How many hydrogen atoms are needed to form 5 water molecules?

Four types of motile cells in human body?

If you are in a chronic state of anxiety but also suffer from moment of sudden, intense fear you are problably suffering. from

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