Weigh the rubber hose; slightly stretch it and measure its length and the tension. Produce a pulse at the end of the hose and measure the number of pulses returned over ten seconds. The number of pulses/10 seconds gives an accurate measure of the frequency of pulsation, or the inverse of the time it takes a pulse to travel the length of the tube and back. This multiplied by the distance the pulse goes (2*tube length) is V. The tension T can be measured by attaching a spring scale to the end of the tube.