A-LevelPhysicsWork, energy and power9702/12 · Feb/Mar 2018 · Q171 Mark

A small diesel engine uses a volume of 1.5 × 10⁴ cm³ of fuel per hour to produce a useful power output of 40 kW. It may be assumed that 34 kJ of energy is transferred to the engine when it uses 1.0 cm³ of fuel. What is the rate of transfer from the engine of energy that is wasted?

A102 kW

B142 kW

C182 kW

D470 kW

✓ Correct answer

A: 102 kW

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2018 Paper 1 Variant 2, question 17.

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