A student makes a solar water heater using a hosepipe - Edexcel - GCSE Physics - Question 2 - 2011 - Paper 1
Question 2
A student makes a solar water heater using a hosepipe.
He paints the hosepipe black and fills it with water.
He coils the hosepipe and fixes it into an open metal bo... show full transcript
Worked Solution & Example Answer:A student makes a solar water heater using a hosepipe - Edexcel - GCSE Physics - Question 2 - 2011 - Paper 1
Step 1
Complete the sentence by putting a cross (✓) in the box next to your answer.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The hosepipe is painted black because blackened surfaces are:
A good emitters of radiation ✓
B poor emitters of radiation
C good absorbers of radiation
D poor absorbers of radiation
Step 2
Suggest two changes to the box which would increase the constant temperature reached.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Use a glass cover on the box to reduce heat loss through convection and radiation.
Insulate the sides of the box to minimize heat loss.
