If a fluid increases in viscosity, in which of the following ways does this change the fluid’s resistance to deformation? Which of the following most correctly describes how the drag force exerted by a fluid on an object moving through the fluid varies with the speed at which the object moves through the fluid? Thin layers of equal area and thickness of two different-colored oils are placed onto the central region of the top surface of two identical solid disks, as shown in the diagram. The disks are then rotated with equal angular velocities and the oils spread over the surfaces of the disks. The oils have the same density but different viscosities. Which of the oils has the greater viscosity?