many events that occur on earth and in the solar system are related to the fact that most objects in the solar system move in regular and predictable patterns. what causes objects in the solar system to move in these regular and predictable patterns? a. frictional forces b. gravitational forces c. electrical forces d. nuclear forces

In what for do plants utilize nitrogen? why do they need nitrogen?

Which part of cellular respiration must occur before any of the other steps can occur

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