Logical 'AND' Operation
Let us refer to a circuit consisting of two switches p and q connected in series with a lamp and battery as shown in figure. The lamp will glow, only if switch p and switch q are closed. If we replace the word 'closed' by T and 'open' by F, the switch will glow only if p = T and q = T...
Let us refer to a circuit consisting of two switches p and q connected in series with a lamp and battery as shown in figure. The lamp will glow, only if switch p and switch q are closed. If we replace the word 'closed' by T and 'open' by F, the switch will glow only if p = T and q = T...Night Soil
Human excreta mixed with soil is called night soil. Open latrines in the villages and some parts of cities are the source of this pollution. These contain disease-causing germs which can spread the disease. It is estimated that millions of children worldwide die before they rea..
Electric Circuits and their Components
Electric Circuits and their Components - The devices which deliver electricity are called the 'sources'and lamps, electric engines, etc. which consume electricity are called 'loads'. Switches are used to switch the loads on and off whenever necessary. Hence, the source, the load..
Precautions while using LPG
LPG cylinder valve and the knob of the stove must be closed properly when not in use. Open flames, electric/kerosene stoves must not be used near an LPG cylinder. Rubber pipe connecting the cylinder and the stove must be regularly checked for any wear and tear. When a leakage (..
Construction
The biogas plant is a brick and cement structure having the following five sections: Mixing tank present above the ground level Inlet chamber: The mixing tank opens underground into a sloping inlet chamber Digester: The inlet chamber opens from below into the digester ..
The biogas plant is a brick and cement structure having the following five sections: Mixing tank present above the ground level Inlet chamber: The mixing tank opens underground into a sloping inlet chamber Digester: The inlet chamber opens from below into the digester ..Evaporation and volatility
Evaporation is the process of conversion of a liquid into its vapours at room temperature. When a liquid is placed in an open vessel, it gradually evaporates and is converted into its vapours. The molecules of liquids escape from the surface inspite of strong intermolecular cohesive forc..
Acoustics of Buildings
An auditorium is a part of a building in which large number of people may be seated to listen to a speech or music. It is not uncommon to find an auditorium, which may be an architectural masterpiece but falls below standards on acoustic considerations. In spite of the usage of amplifiers, the audi..
Exhaustible Natural Resources
; agricultural produce having pesticide and fertilizer traces beyond acceptable levels are banned in major world markets. Every country now has in place a ministry dealing with the environment, complete with regulating bodies, air water and soil pollution laws. Also a host of local, national and in..
Plant Tissue Culture
It refers to culture or growing the plant tissues. Plant tissue culture is developed as a separate branch of science - ever since the potentiality of each cell or tissue of plant to grow into a separate organism has been recognised. Tissue culture technique has opened up new opportunities..
Plant Tissue Culture
Plant Tissue Culture - It refers to culture or growing the plant tissues. Plant tissue culture is developed as a separate branch of science - ever since the potentiality of each cell or tissue of plant to grow into a separate organism has been recognised. Tissue culture technique has opened..
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