Vă rog să realizați fiecare câte un referat (maxim 3 pagini) având ca temă: "Rezervații naturale" Puteți să vă alegeți o rezervație sau mai multe. Pot fi din România sau din străinătate.

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