what do we call the graph which represents energy
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Answer:
The graph shown in the figure represents energy density Elambda versus lambda for three sources sun, welding age and tungsten filament. For lambdamax , ...
Answer:
The world’s potential supply of fresh water has been affected by pollution and irregular rainfall patterns. Water use has increased twice as fast as the growth of population. In the future, global warming is expected to have a significant impact on water supplies with increased floods in some areas and droughts in others. Most people in underdeveloped countries get their water from streams, rivers or storage ponds. This water is likely to be polluted. The only clean water available comes from underground, called groundwater, and is accessed through wells and water pumps. One pump or well is often shared by a whole village. This means having to walk great distance to collect supplies. Imagine life in your home with no taps for water and no toilets. This is how more than two billion people in