A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2019 · Q171 Mark
The data below are taken from a test of a petrol engine for a motor car. power output = 150 kW fuel consumption = 20 litres per hour energy content of fuel = 40 MJ per litre What is the ratio power output / power input?
A150 × 10³ / (40 × 10⁶ × 20 × 60 × 60)
B(150 × 10³ × 60 × 60) / (20 × 40 × 10⁶)
C(150 × 10³ × 40 × 10⁶ × 20) / (60 × 60)
D(150 × 10³ × 20) / (40 × 10³ × 60 × 60)
✓ Correct answer
B: (150 × 10³ × 60 × 60) / (20 × 40 × 10⁶)
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Work, energy and power and see which topics are most likely to come up next.
Sign up free →