buy an airplane. Fly it in a straight line directly to any location in the mid latitudes. You will not reach your destination if a straight path is taken. Try it yourself, either get a pilots license or make friends with a pilot, and do it. you will not reach your destination if you take a straight line course because the earth will continue rotating as you fly above it, this will result in your course being shifted to the right in the N. Hemisphere, which will be easily identifiable when you partake in this hands on proof of the Coriolis effect.