The study of waves therefore forms a topic of central importance in all physical science and engineering. 1  The simplest types of wave motion are vibrations of elastic media, such as air, crystalline solids, or stretched strings. If, for example, the surface of a metal block is struck a sharp blow, the deformation of the surface material compresses the metal in the vicinity of the surface, and this transmits the disturbance to the layers beneath.
There are many aromatherapy recipes for treating the symptoms of respiratory infections. Here are a few: For blocked sinuses and tight dry coughs add two drops of eucalyptus radiata essential oil to a bowl of hot water. Drape a towel over the head and lean over the bowl.
This time they have a horrible cough and have gotten a bit of a fever. I do have a nebulizer because I myself have asthma and last year Kaelyn got a bad cough that she was also put on steroids using the nebulizer. Well, I decided that I would also make an Essential Oil Vapor Rub for Cough as well.