One of the most important standards that the API has set is the method used for measuring the density of petroleum. This standard is called the API gravity. Specific gravity is a ratio of the density of one substance to the density of a reference substance, usually water.
The most common symptoms of RSI include: 1  Pain. 2  Tingling. 3  A feeling of restlessness in the joint. 4  Weakness. 5  Throbbing. 6  Stiffness or cramp.
Signs and symptoms of RSV include: Cough; Fever; Irritability; Runny nose; Sneezing; Sluggish or being inactive; Trouble breathing; Wheezing; Symptoms of RSV usually last about one to two weeks. If you think your baby may have RSV, contact her health care provider. When should you call your baby's health care provider right away? Call your baby's health care provider right away if your baby has: