The center of this seesaw is used to balance the board with the seats. the children can easily move up and down without much force. the seesaw is an example of wich simple machine?

a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.

answerambulatory;