The distance between two consecutive nodes

Question

of a standing wave is 19.2 cm. The hand generating
the pulses moves up and down through
a complete cycle 2.59 times every 7.44 s.
Find the velocity of the wave.
Answer in units of m/s.

Answer 1

The frequency is (2.59 / 7.44) Hertz and the wavelength is (0.192 * 2) m therefore you use the equation that states the Velocity = λf
Velocity = (2.59 / 7.44) * (0.192 * 2)
Velocity = 0.1336774194