31. But I thought the Coriolis force is always perpendicular to the velocity, not just to the radius. 32. With a fluid mass, the Coriolis force is proportional to the mass flow rate of that fluid. 33. Oscillation produces the Coriolis force , which traditionally is sensed and analyzed to determine the rate of flow. 34. But the Coriolis force is elementary stuff. 35. When Newton's laws are transformed to a rotating frame of reference, the Coriolis force and centrifugal force appear. 36. The Coriolis force is proportional to the rotation rate and the centrifugal force is proportional to its square. 37. Of course, the Coriolis force does still impact the direction of the flow of water, but only minutely. 38. The force of spin, called the Coriolis force , is greatest at the poles and zero at the Equator. 39. The Coriolis force doesn't exist there. 40. Flow is measured using Coriolis meters by analyzing the changes in the Coriolis force of a flowing substance.