How were the results calculated ?

Experiment VWS-4 Data Sheet Room temperature: 25 OC Tuning-fork frequency: 512 Hz Inside diameter of plastic tube: D = 2.53 cm Determination of wavelength a Item Reading 1 Reading 2 Reading 3 N A A N N Diagrams showing e = sa A A nodes and 5 2 N antinodes of A displacement N e 16.5 cm 4/9. 5 cm 82 cm e COIT = e +.4 D 7. 52 cm 50. 52 cm 83. 02 cm 2 70.07 cm 67.36 cm 66.41 cm Average 2 = 64, 95 _ cm = 0.679 m Measured velocity at room temperature: v = f2 = 347.89 m/s Accepted velocity at 0 C: = 330 m/s 273.2 + tr Accepted velocity at room temperature: V. = Vo = 344.8 m/s 273.2 Percent error in measured velocity of sound: 0. 90