If the mass of an object , the weight of an object will .

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

Long term exposure to waves can cause sunburns and skin cancer.

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm