Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

A.3.10 Energy Density – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The SI unit of specific energy is
J
J kg−1
W kg−1
J m−3
2.
Which has the greatest energy per kilogram?
Petrol
Coal
Uranium-235 undergoing fission
Lithium-ion battery
3.
A fuel has specific energy 3.0 × 107 J kg−1. Burning 2.0 kg releases
1.5 × 107 J
3.0 × 107 J
6.0 × 107 J
1.5 × 108 J
4.
A heater is 80 % efficient and must give 4.0 × 107 J. Fuel has density 4.0 × 107 J kg−1. Mass of fuel needed is
0.80 kg
1.0 kg
1.25 kg
1.6 kg
5.
Why is hydrogen gas inconvenient despite high specific energy?
It releases no energy
It has low energy per unit volume
It is heavier than petrol
It has no chemical energy
6.
Energy density in J m−3 is equal to
energy × mass
energy ÷ volume
power ÷ time
energy × volume
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Part of Theme A — Space, Time and Motion — see every lesson and quiz in this unit.
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