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Capacity to do work is known as energy. It is very important input for all our activities like cooking food, driving vehicle and running industries. The most important challenge that humanity is facing in 21st century is availability of clean, secure and sustainable energy supply.
Energy sources are broadly divided into two categories. Renewable and renewable energy sources which are further divided into many sub categories:
These sources are regenerated by natural processes so that can be used indefinitely. These are:
(i) Solar energy (ii) water (iii) wind
(iv) Tidal (v) biomass (vi) geothermal
(viii) Ocean thermal energy
In what ways could human activity lead to the extinction of a species in an area? Human activity could lead to extinction of a species by (a) over-hunting, e.g. elephants, rhin
Water of Estuaries The water of estuaries is turbid because of the great number of particulates in suspension in the water. The turbidity is minimum near the mouth and increas
You observe the following numbers of individuals of each genotype in a population. AA=700, Aa=200, aa=100. What are the observed genotype frequencies in this population? What are t
Q. Complications Causes by gastro oesophageal reflux disease? Apart from the symptoms, which you have just read above, there are a few extra oesophageal manifestations of GERD.
Explain the Disadvantages of tissue punch - There is a loss of keratini-ed tissue and this can lead to a compromised soft tissue barrier in cases where there is deficiency of a
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Advantages of Ridgemapping This procedure is a good indicator of the available bone width and helps in understanding the angulation of the available bone to the eventual prosth
An increase in blood plasma levels of parathyroid hormone A. occurs in response to enhance in the levels of calcium ions in blood plasma. B. leads to enhance in the amou
The effect of light on the growth of stems (a) Plant some seeds that grow rapidly like as oats, radish, bean or mustard seeds in two flower pots. When the seedlings are about
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