A dolphin emits an ultrasonic wave with frequency of 0,15 MHz. The speed of the ultrasonic wave in water is 1500 m • s −1 .

A dolphin emits an ultrasonic wave with frequency of 0,15 MHz. The speed of the ultrasonic wave in water is 1500 m · s −1 . What is the wavelength of this wave in water?                                                                      a. 0,1 mm         b. 1 cm           c. 10 cm         d. 10 m      e. 100 m