31. Moving the bob up reduces the length of the pendulum, reducing the pendulum's period so the clock gains time. 32. In most pendulum clocks the rate is adjusted by moving the bob up or down on the pendulum rod. 33. They may bob up into the world of the forms, but at other times enlightenment is hidden from them. 34. The man in drag then dances about briefly, making sure that his penis bobs up and down in the air. 35. The flight is weak and erratic and the body of the butterfly bobs up and down as it beats its wings. 36. Intrinsic value is often impossible to determine _ and market value can bob up and down along with a star's reputation. 37. The heads of the birds bob up and down in a fluid rhythm as the geese feast on the park's grass. 38. Its orbit is also tilted a little, causing it to bob up and then down once each year through Earth's orbital plane. 39. For example, as Faith's speed builds up while running, the rate at which the camera bobs up and down increases as well. 40. The little girl's soft brown hair is gathered on top of her head, and it bobs up and down with each move.
