un objeto golpea una superficie liquida generando perturbaciones cuya longitud de onda es de 5cm propagándose con una rapidez de 30 cm/s. cual es la frecuencia de las ondas de medida en hz

Pls quickly! which of the following statements about spanish plantations is not accurate? a. spanish plantation screw sugarcane for export to spain. b. the spanish had a little concern for the lives of the indians who worked on the plantations. c. spanish presentation grew a wide variety of crops and sent the produce to many different european countries. d. to replace the native americans our dying off the spanish important african slaves.