Igneous rocks that from the surface are intrusive

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is 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

About __ of the mass of the cell is water