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Determine about the soil humus
The organic constituents (organic colloids) are due to mainly the plants and partly the animals. They form only a small fraction and get transformed into new products which get thoroughly mixed up with the soils leading to the formation of soil humus.
Softening water with chemicals Try making suds with a half test tube of hard water and a few drops of soap solution. Next boil a same sample and again try to make suds by usin
What causes winds? An uneven heating of the Earth's surface causes winds. On being heated, air becomes lighter and rises up. As a result, a region of low pressure is created. Th
The hydrogenation of cyclohexene in the liquid phase has been investigated in a laboratory reactor in the temperature range from 25°C to 30°C. The catalyst (Pt) is suspended in the
INTRODUCTION : You have studied about the hazards of electricity in Unit 11 of Block 3. You have learnt that most of the electrical accidents like shock, fire, etc. occur often du
Explain maintaining the pH Balance You must be aware of the term pH. PH we know provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 i
Effects of Global warming ñ Alterations in the Global Precipitation: A more warm atmosphere will contribute to enhanced evaporation from surface waters and leads to the more
Biogas You may have heard of the use of cattle dung for production of biogas which is used for cooking. Water weeds like water hyacinth, water lettuce, salvinia, hydrilla, du
Why did the continents spread apart? This is because of the heat generated from the earth's interior and earthquakes - the convection currents deep within the earth due to the
I just don''t get it
The Maximum theoretical limit of channel is governed by Nyquist theorem, which says Bth = 2 x freq in hertz x log2L ( where L = number of level) Thus we have in this case Bth= 2x60
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