4. What are two ways that celestial navigation/astronavigation and navigation by GPS differ? Do they have anything in common?

What does it mean for a cell membrane to be selectively permable

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

Answer now! good pts and a brainliest potatoes are what im like a potatoe irdk have a good day