Answer Happy

n (vii) The Dolphin shown in Figure 1 below is immigrating in the winter moving from ocean salty water into fresh (unsalty) river water. The velocity of the dolphin in the salty water is m/s where n is the last two digits of your ID number and k is a value you should select to adjust the speed of the dolphin to a reasonable value (3-12 m/s). Using the method of repeating variable and Pi Buckingham theory a) , develop a relationship between the reference pressure difference (P.-P.) and the rest of the parameters (2 marks) b) While swimming, the Dolphin would encounter drag force Fa. Develop a relation between the drag force and the rest of the parameters including the pressure difference (2 marks) c) Doing your own research, find the physical properties of salty and fresh water (density and viscosity) and determine the velocity of the Dolphin in fresh water. (1 marks) Po f V р, р 100 P. Figure 1