An electric deep fryer was switched on.
Figure 1 shows how the temperature of the cooking oil inside the fryer changed over time.
When the fryer was switched on, the temperature of the oil did not immediately start to increase.
Suggest one reason why.
The energy transferred to the oil in 120 seconds was 190 000 J190\,000\text{ J}190000 J.
Given that the specific heat capacity of cooking oil is 2000 J/kg ∘C2000\text{ J/kg }^\circ\text{C}2000 J/kg ∘C.
Determine the mass of oil in the fryer. Use Figure 1.
Give your answer to 2 significant figures.
The straight section of the line in Figure 1 can be used to calculate the useful power output of the fryer.
Explain how.
Internal energy and energy transfers Questions
Practise AQA GCSE Physics Internal energy and energy transfers with exam-style questions for Foundation and Higher tier. 48 questions covering Internal energy, Temperature changes in a system and specific heat capacity, and Changes of state and specific latent heat, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.