A student makes a solar water heater using a hosipep - Edexcel - GCSE Physics - Question 2 - 2011 - Paper 1
Question 2
A student makes a solar water heater using a hosipep. He paints the hosipep black and fills it with water. He coils the hosipep and fixes it into an open metal box a... show full transcript
Worked Solution & Example Answer:A student makes a solar water heater using a hosipep - Edexcel - GCSE Physics - Question 2 - 2011 - Paper 1
Step 1
The hosipep is painted black because blackened surfaces are
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Answer
A good emitters of radiation.
Step 2
Suggest two changes to the box which would increase the constant temperature reached.
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Answer
Use a glass cover over the box to reduce heat loss through convection and evaporation.
Insulate the sides of the box to minimize heat loss to the surroundings.
