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.
- 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
- The graphs below show some trends in visits to the UK by overseas residents and visits overseas by UK residents between 1982 and 2002 Summarize the information by selecting and reporting the main features and make comparisons where relevant Write at least 75
- 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
- There is evidence that inhaling cigarette smoke cause health problems not only for smokers but for non smokers who inhale other people s smoke In view of this smoking should be banned in all public places even though this would restrict some people s free 73
- Describe the inner four planets of the solar system
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