31. Split-octonions are used in the description of physical law . 32. I work from the idea, and have acquainted myself with the physical laws of sound. 33. You seem to be under the impression that radioactivity appears to " break physical laws ". 34. The use of physical laws for the design made a reduction of the magnetic field possible. 35. Using physical laws , units of quantities can be expressed as combinations of units of other quantities. 36. That is, there is a fixed set a physical laws that govern how the universe behaves. 37. Physicists use the word symmetry whenever they find that physical laws remain indifferent to some change. 38. Conversely, it facilitates the description of a physical system based on classes of hypothetical physical laws . 39. For him, the philosopher should proceed through inductive reasoning from fact to axiom to physical law . 40. Different zones of the city operate under different physical laws because of the proximity of other dimensions.