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Centimeter Path: The arrangement of paving units in a path can subtly affect the speed at which you walk. A uniform grain along the path—for example, that created by bricks laid lengthwise in stretcher bond—can seem to hurry you on, whereas a less directional pattern will encourage a slower pace. The treatment may be chosen to suit the purpose of the path—a "slow" path where there is plenty to admire, a "faster" path where the aim is simply to provide access to another part of the garden.
Specific ionization is defined as the number of ion-pairs formed per centimeter path of path. Since a charged particle in motion constitutes an electric current, it follows that, for particles having the same mass, those with greater charge will produce ionization more rapidly. For particles having the same charge, but different mass, the slow heavier particles will produce a greater specific ionization because the time in which they remain in the region of influence is longer.
The situation is similar for the human ear. Although the human ear hears vibrations of from about 16 to 20,000 cycles per second, its greatest sensitivity is reached at about 3,000 cycles per second. At this frequency A. Wilska in 1935 found that the extent of movement of the ear drum in response to a threshold tone is less than one billionth of a centimeter path. The movement of the basilar membrane must be less than one one-hundred-billionth (10"") of a centimeter path—a distance smaller than one one-thousandth of the diameter of a hydrogen atom. |
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