Rainwater is an example of a primary source of water. Water from a pumping station is a secondary source of water.
Primary sources of water are rivers , lakes, natural ponds, underground water,etc. Secondary sources of water are those which are collected by us from natural sources in order to save the water . These include water stored in tanks, buckets, underground , used water, etc.
There are two pumps the primary and the secondary pump. The primary is the chilled water pump which is what pumps cold water throughout the building and the secondary circulates the water.
If you have a primary /secondary, the chilled water should be constant at the primary loop. The secondary can be variable. The air seperator is always connected at the return water side and is most likely very effective at the primary return. However is a must as well on the return side of the secondary.
Primary sources are ones that has a proof or things that has to be told or speak about your proof.While Secondary sources is the opposite of the primary source it like things that are not true, made another one, errors, or telling wrong proof. -Sr. Ariston
The primary sector relates to the extraction and production of natural resources - like farming and mining. The secondary sector relates to the processing of the resources, which includes manufacturing. The tertiary sector relates to the support of the primary and secondary sectors. This includes transportation, banking, insurance, etc.
Some types of secondary energy resources include electricity, hydrogen, and compressed air. These resources are produced using primary energy sources such as coal, natural gas, and renewable sources like solar and wind energy.
Oil is considered a primary product as it is extracted directly from natural resources such as crude oil reserves. Secondary products are derived from primary products through further processing or manufacturing. Oil can be refined into secondary products like gasoline, diesel, and jet fuel.
Since they consume algae and protozoans you could argue that they are both primary and secondary consumers being that they are omnivorous.
secondary resource- are usually published by books or articles by authors who were not eyewitnesses of participants.
Inputs which are directly and indirectly helpful in functioning of primary sectors are called primary sectors procurements. It may be materials, raw as well as processed materials, man made resources, natural feeding etc. Resources which are all used by the secondary sectors for the benefit of production of goods and services are termed as secondary sectors procurements. The output of primary sectors may be the procurements for the secondary sectors or from the another secondary sectors out put may be used, Services of tertiary sectors also the procurements for both the sectors.
PRIMARY ACTIVITIES : these are connected with extraction and production of natural resources . these activities are directly associated with land and water. primary occupations have a direct link with nature of physical environment . for e.g. - forestry, mining , etc TERTIARY ACTIVITIES : these are those activities which provide support to the primary and secondary activities. these services increases the efficiency of the workers of primary and secondary sectors. tertiary activities consist of service occupations. for Example - education, health, etc
primary and secondary demand