The fundamental frequency of a standing wave on a 1.0 m long string is 440 Hz. What would be the wave speed of a pulse moving along the string

Answer 1

T = (1/440) in seconds
fundamental is half a wavelength in length of string (nodes at the two fixed ends)
so wavelength = 2.0 meters
v = distance / time = 2.0 * 440 = 880 m/s