| 41. | A parabola spun about this axis in three dimensions traces out a shape known as a paraboloid of revolution.
|
| 42. | According to a contemporary publication, " the construction of the twin hyperbolic paraboloid main roofs is unique ".
|
| 43. | The mirrors have spherical shape with a curvature corresponding to the position of the plate in the paraboloid reflector.
|
| 44. | The density of the liquid, for example, has no effect on the focal length of the paraboloid.
|
| 45. | The market is especially noteworthy for its roof of hyperbolic paraboloids, which allow for wide areas without supports.
|
| 46. | The latest mercury mirrors start out as shells cast in approximately paraboloid shapes from strong, rigid epoxies and Kevlar.
|
| 47. | Paraboloids are also observed in the surface of a liquid confined to a container and rotated around the central axis.
|
| 48. | As it moves, it will pass through the other two paraboloids, like a ghost passing through a wall.
|
| 49. | In a constant gravity field, the free surface of the liquid, if present, is a concave paraboloid.
|
| 50. | Some special cases of hyperboloids ( of either one or two sheets ) and elliptic paraboloids are surfaces of revolution.
|
