The distance between 4 nodes (3 sections, 2 sections=a wavelength) is 15.0 cm. The frequency of the source is 10.0 Hz. What is the speed of the
waves in cm/s?
A) O 75.0 cm/s
B). 1.50 x 10^2 cm/s
C) 2.00 x 10^2 cm/s
D) 9.00 x 10 cm/s
E) 1.00 x 10^2 cm/s

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.