An object is pushed with a force of 400 N for 20 meters; what is the work done on the object? Solve using W=F*d

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

no simpler subs form complex ones. synthesise = make

mass and volume are the answers you are looking for

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )