5a \machine produces compression waves in a spring that is 120  cm long by pulsing twice every second. the back and forth movement of the pulse creates compressed sections of the spring that are 30  cm apart and travel toward the other end of the spring. which property of the wave does the value of two per second describe? a. wavelength b. intensity c. frequency d. amplitude

D. Frequency

Explanation:

The machine produces compression waves in a spring that is 120cm long and it pulse twice every seconds. The property the wave exhibits by exhibiting the value of two per second is the Frequency.

Amplitude of a a wave is the maximum displacement from the equilibrium position. The amplitude of an object is equal to one half the path of the vibration path. The amplitude of a wave is proportional to the amplitude of the source. Amplitude measures how big a wave is . Amplitude of a wave usually look at the energy of a wave so it is not the amplitude .

The frequency of a wave gives the number of  wave that passed fixed point at a given time.

c. magnitude and direction