Water heating is a thermodynamic process that uses an energy source to heat water above its initial temperature. Typical domestic uses of hot water include cooking, cleaning, bathing, and space heating.In industry, hot water and water heated to steam have many uses. common arrangement where hot-water space heating is employed, is for a boiler to also heat potable water, providing a continuous supply of DHW without extra equipment. Appliances that can supply both space-heating and DHW are called combination (or combi) boilers.
1 The population of South Africa is estimated at 53,139,528 as of July 1 2014. 2  South Africa's population is equivalent to 0.73% of the total world population. 3  South Africa ranks number 25 in the list of countries by population.
Population distribution: the way in which a population is spread over an area. This usually requires a description. Population density: the number of people per specified area, for example, population per kilometre squared. This will be a figure, for example, 78 people/km 2.It is very common for the examiners to question you on your knowledge of population distribution at a global or national scale.opulation density: the number of people per specified area, for example, population per kilometre squared. This will be a figure, for example, 78 people/km 2. It is very common for the examiners to question you on your knowledge of population distribution at a global or national scale.