Question 7 (1 point) In a ripple tank, the wavelength X1 of waves in the deep water is 3.0 cm. The wavelength 12 of waves in the shallow water is 1.5 cm. The wave generator has a frequency of 22 Hz. The speed of the waves in the deep water is 66 cm/s 15 cm/s ( 7.3 cm/s 4.5 cm/s 33 cm/s Question 8 (1 point) In a ripple tank, a point on the second anti-nodal line from the centre is 15.0 cm from one source and 30.0 cm from the other source. The sources are separated by 12.0 cm and vibrate in phase at 13.0 Hz. Calculate the wavelength of the wave. 30.0 cm 7.50 cm O 22.5 cm 10.0 cm 15.0 cm