Inertial wave lakes, and laboratory experiments. Rossby waves, geostrophic currents, and geostrophic winds are examples of inertial waves. Inertial waves are also likely to exist in the molten core of the rotating Earth. Inertial waves are restored to equilibrium by the Coriolis force, a result of rotation. To be precise, the Coriolis force arises (along with the centrifugal force) in a rotating frame to account for the fact that such a frame is always accelerating. Inertial waves, therefore, cannot exist without rotation. More complicated than tension on a string, the Coriolis force acts at a 90° angle to the direction of motion,
The Currents of Space more amenable. When Trantor offers to buy out the entire planet for a very high price, the offer is readily accepted. Even though there is not yet a full Galactic Empire, Trantor controls the now largely-radioactive Earth. The idea of evacuating Earth is mentioned, but that is strongly rejected by Rik. He insists that it is the original planet of the human race, but that is not generally accepted. "Galaxy" reviewer Groff Conklin described the novel as "one of Asimov's lesser efforts, but still considerably above the average space opera". The magazine's Floyd C. Gale told readers "Don't miss" it