Describe how solar radiation can be utilised to rpovide domestic hot water and lightening
The solar radiation can be converted in two different domestic forms of final energy, the first one is electricity, second one is the energy from which we can warm up disposable water.
This process begins with the energy provided by the sun that has to be gathered in a collector from which it can reach photovoltaic cells to produce electricity or it can reach a heat exchanger to be converted in heat and give hot water. This step is dependent on the amount of sunlight that can be collected by the machines.
The second step is the integration of the solar energy previously gathered in accumulators (giving electricity) or in water tanks (giving hot water), the so called secondary circuits.
The final output of this process is in the domestic use of electricity lightening up our lights, and in the tap water coming out of the taps in our buildings.
- Some people choose to eat no fish or meat. They believe that this is not better for your own health but also benefits the world as whole. Discuss these view and give your own opinion. 90
- The graph below gives information about international tourist arrivals in different parts of the world. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. 80
- The chart below shows the annual number of rentals and sales( in various formats) of film from a particular store between 2002 and 2011.Summarize the information by selecting and reporting the main features and make comparisons where relevant. 80
- The chart below shows the changes that took place in three different areas of crime in New Port city center from 2003-2012. Summarize the information by selecting and reporting the main features, and make comparisons where relevant. 80
- In the past, shopping was a routine domestic task. Many people nowadays regard it as a hobby. To what extent do you think this is a positive trend? 80
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No. of Words: 150 200
Attribute Value Ideal
Score: 6.5 out of 9
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Fourth Root of Number of Words: 3.5 4.0
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Number of Paragraphs: 4 4