Adjacent antinodes of a standing wave on a string are 15.0 cm apart. a particle at an antinode oscillates in simple harmonic motion with amplitude 0.850 cm and period 0.0750 s. the string lies along the +x-axis and is fixed at x = 0. (a) how far apart are the adjacent nodes? (b) what are the wave-length, amplitude, and speed of the two traveling waves that form this pattern? (c) find the maximum and minimum transverse speeds of a point at an antinode. (d) what is the shortest distance along the string between a node and an antinode?