difference between primary sources and secondary sources

Source of Electricity - Electrons in different metals can have different energies. If two of these metals are placed in a conducting liquid (electrolyte) a difference in electrical potential is set up between them. A pair of different metals arrange..

Electrons in different metals can have different energies. If two of these metals are placed in a conducting liquid (electrolyte) a difference in electrical potential is set up between them. A pair of different metals arranged in this way is an electroc..

The Sun radiates energy in the form of heat and light. We utilize these forms of energy either directly or indirectly, after conversion into some other forms. Utilization of solar energy in various ways is as represented. Besides the primary role of the Sun's energy, it is now belie..

In different colors, the fringes have different widths. This indicates that a relation exists between colour and fringe widths. But before going to the relation, let us know more about the condition under which constructive interference or destructive interference occur..

Conventional sources of energy include fossil fuels, thermal energy and hydroelectric energy. Fossil Fuels It includes fuels which are most commonly used such as wood, coal and petroleum. These fossil fuels are non-renewable sources of energy. Therefore we need to conserve..

Earth as a Source of Elements - Most elements are formed due to fusion of simple nuclei to give heavier nuclei i.e., nucleosynthesis or nuclear fusion reactions taking place in the stars. Atoms of these elements began to fall together about six billion years ago to form a system, presentl..

In a homogeneous medium, the velocity of light waves is same everywhere. So the disturbances reach all such particles at the same time. These particles are at the same distance from the source and so they vibrate in phase with each other. The locus of all such particles is called wave fr..

Source Electricity Production ( MW) Thermal power(sloar energy) 70,200 Hydel Power 23,800 Nuclear Power 2,700 Wind Power 1,150 Biomass Power 256 ..

Secondary phloem is the phloem that is formed during secondary growth. It is a derivative of secondary meristem. Secondary phloem is characteristic feature of only dicots. It is also known as bast. It is also of commercial importance since it yields bast fib..

A survey was conducted to know the sources of information people get through different channels. The results are recorded as shown in the graph. Find the difference between the highest and the lowest percentages. => 17% or 21% or 11% or 6%..