Science

About Petroleum Definition Petroleum is a thick, flammable, yellow-to-black mixture of gaseous, liquid, and solid hydrocarbons that occurs naturally beneath the Earth’s surface. Primary source…

Sulfur Definition Sulfur is a pale-yellow, brittle nonmetallic element that occurs widely in nature, especially in volcanic deposits, minerals, natural gas, and petroleum. It is…

About Neutron Definition Neutron is an electrically neutral subatomic particle in the baryon family, having a mass of 1.674 × 10-24 grams (1,838 times that…

In general, the surface area is the sum of all the areas of all the shapes that cover the surface of the object. To calculate…

About Proton Definition Proton is a stable subatomic particle in the baryon family having a mass of 1.672 × 10-24 grams (1,836 times that of…

Bronchus Definition Bronchus, also called bronchi is either of the two main branches of the trachea that lead to the lungs, where they divide into…

Ammonium Sulfate Definition Ammonium Sulfate; (NH4)2SO4 is a brownish-gray to white crystalline salt used in fertilizers and water purification. It is an inorganic salt with…

About Ammonia Definition Ammonia (NH3) is a colorless alkaline gas that is lighter than air and has a strong pungent odor. It is used as…

Proteoglycan Definition Proteoglycan is any of a group of polysaccharide-protein conjugates present in connective tissue and cartilage, consisting of a polypeptide backbone to which many…

Periodontal Fiber Definition Periodontal fiber is attached to the dentin of the root of the tooth by cementum and to the bone of the jaws…

Surface Area of Cylinders Surface Area of Cylinders means the number of square units it takes to exactly cover the surface of a cylinder. To…

About Hydrogen Definition Hydrogen is the lightest and most abundant element in the universe, normally consisting of one proton and one electron. It is a…