How far would a couch move if it is pushed with 75 N to produce 15,000 J of work?

Which description best characterizes the motion of particles in a solid?

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.