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.3.2 Sankey Diagrams – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
In a Sankey diagram, the width of an arrow represents
the time taken
the amount of energy (or power) transferred
the temperature
the force
2.
An input arrow is 500 J and the useful output arrow is 200 J. Efficiency is
0.25
0.40
0.60
2.5
3.
Two stages with efficiencies 50 % and 60 % act in series. The overall efficiency is
55 %
110 %
30 %
10 %
4.
A lamp has input 60 W and gives 6 W of light. The wasted arrow is
6 W
54 W
60 W
66 W
5.
Which would make a Sankey diagram invalid?
A wasted arrow drawn upward
Output arrows whose widths sum to more than the input
Labelling arrows in watts
A narrow useful arrow
6.
Which device would have the narrowest wasted-energy arrow relative to its input?
Filament lamp
Typical petrol car engine
Large efficient electric motor
Open coal fire
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Part of Theme A — Space, Time and Motion — see every lesson and quiz in this unit.
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