Oliver Gonzalez——Works at the International Criminal Court, Lives in The Hague, Netherlands.
Other times it is easy to point out the simple machines: a door, for example, has hinges (which serve as a lever) and a door knob (a wheel-and-axle). Everyone look at the door to this room.read more >>
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.