A commercial espresso machine has a stainless steel outer body.
Explain why it would be hazardous for the live wire of the power cable to come loose and contact the stainless steel body.
The heating element of the espresso machine has a power rating of 2.88 kW2.88\text{ kW}2.88 kW. The machine is connected to a mains potential difference of 240 V240\text{ V}240 V. Calculate the electrical current drawn by the machine.
The espresso machine is used to heat a reservoir of water from 16 ∘C16\ ^\circ\text{C}16 ∘C to 96 ∘C96\ ^\circ\text{C}96 ∘C to prepare steam.
The power output of the heating element is 2.88 kW2.88\text{ kW}2.88 kW.
The specific heat capacity of water is 4200 J/kg ∘C4200\text{ J/kg}\ ^\circ\text{C}4200 J/kg ∘C.
Calculate the mass of water that can be heated through this temperature range in 35 seconds35\text{ seconds}35 seconds.
Practise AQA GCSE Physics Domestic uses and safety with exam-style questions for Foundation and Higher tier. 13 questions covering Direct and alternating potential difference and Mains electricity, 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.