Questions

The law of conservation of mass states that in any closed system the mass of the system is neither created nor destroyed over time i.e, the mass cannot be changed overtime.

Hence, the given statement is true.

After the deaths of  Cromwell monarchy was restored and Charles II was made king of England. He and his successor, James II tried to assert the superiority of the monarchy. But feelings against this kind of rule had grown too strong. In 1688, a group of politicians invited William of Orange, the husband of James II's daughter, Mary, and rulers of Holland, to become king. Without firing a shot, William reached London and James II fled to France. The throne was granted to William and Mary Jointly. This event is known as the 'Glorious Revolution' . This revolution marked the triumph of parliament over the monarchy.

Comprehensive income is the sum of net income and other items that must bypass the income statement because they have not been realized, including items like an unrealized holding gain or loss from available for sale securities and foreign currency translation gains or losses.

Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment.

Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. This removes material that will either float or readily settle out by gravity. It includes the physical processes of screening, comminution, grit removal, and sedimentation.

Secondary treatment removes the soluble organic matter that escapes primary treatment. It also removes more of the suspended solids. Removal is usually accomplished by biological processes in which microbes consume the organic impurities as food, converting them into carbon dioxide, water, and energy for their own growth and reproduction.

Tertiary treatment includes removal of nutrients such as phosphorus and nitrogen and practically all suspended and organic matter from waste water.