Paper 2 H - SAMPLE SET 1 Q21 Answers
21) Alex has two radiators in her home. They are filled with 10 kg of different liquids.
The radiators have different power ratings.
The radiators have different power ratings.
(a) The heaters are turned on and the temperature of each rises by 40 ºC in 1 680 seconds.
Use the data to show that the heaters take the same time to heat up. [4]
(b) Alex has two fires in her home, X and Y shown in the diagrams below.
Use the data to show that the heaters take the same time to heat up. [4]
(b) Alex has two fires in her home, X and Y shown in the diagrams below.
Why does Fire Y helps save money on the energy bills for her home?
Use calculations of efficiency in your answer. [4]
(Total for Question 21 = 8 marks)
Use calculations of efficiency in your answer. [4]
(Total for Question 21 = 8 marks)