AQA A LEVEL PHYSICS 7408/2 PAPER 2 MARK SCHEME JUNE 2022. Combining and making use of Q = Pt and Q = 1 numerical errors are ignored for this mark. Provided the temperature difference is correct then subsequent changes that involve 273 0C can be ignored. (125−20) 2 t = (1.2 × 450) 2100 No ecf for the second mark but correct answer gains both marks Condone use of cwater for cmetal. 2 2 x AO2 mc � equations without the need to make t the subject. 1 t = 27 (s) 2 3.6.2.1 6 S- T-...