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.
RSV infection can cause cold-like symptoms, including cough and runny nose, which usually last for 1-2 weeks. Call your baby's doctor if you notice any of the following symptoms: Trouble breathing; Cough producing yellow, green, or gray mucus; Unusually upset or inactive; Refuses to breastfeed or bottle-feed