(See Fluids in the News article titled “Winds on Earth and Mars,” Section 4.1.4.) A 20-f...

(See Fluids in the News article titled “Winds on Earth and Mars,” Section 4.1.4.) A 20-ft-diameter dust devil that rotates one revolution per second travels across the Martian surface (in the x direction) with a speed of 5 ft/s. Plot the pathline etched on the surface by a fluid particle 10 ft from the center of the dust devil for time . The particle position is given by the sum of that for a stationary swirl and that for a uniform velocity where x and y are in feet and t is in seconds.