See also:

CD care and cleaning
-Handle a CD by its edges. Do not bend the disc. Never touch the surface of the disc. - Always place the discs in the storage case when they are not being used. - To clean a disc, wipe the sur ...

AM radio reception
AM signals, because of their low frequency, can bend around objects and skip along the ground. In addition, the signals can be bounced off the ionosphere and bent back to earth. Because of these c ...

Precautions on seat belt usage
If you are wearing your seat belt properly adjusted, and you are sitting upright and well back in your seat with both feet on the floor, your chances of being injured or killed in an accident ...