Q4. (a) (1) electrical kinetic correct order only sound (ii) transferred into surroundings / atmosphere accept warms the surroundings allow released into the environment becomes heat or sound is insufficient Q5. (a) electrical sound 1 correct order only 1 (b) the energy transformed by the TV will be destroyed (c) a higher efficiency than 1 1 Q6. (a) Ep 50 x 9.8 4.0 Ep = 1960 (J) allow an answer rounded to 2000 (J) allow a maximum of 1 mark if g = 10 N/kg is used an answer of 1960 scores 2 marks (b) Ek 0.5 x 50 x 72 (c) Ek = 1225 (J) allow 1200 or 1230 (J) an answer of 1225 scores 2 marks some energy is wasted the g.p.e of the girl is not zero