What type of reaction is combustion of coal? A. endothermic B. physical C. heat-absorbing D. exothermic

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

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

Freckles are a dominant trait in humans. both of the girls have the genotype ff for freckles. if either one marries a man with no freckles, what are the chances that their children will have freckles?