🔬 Science · Energy
Efficiency, Sankey diagrams, and work done
Calculate energy efficiency as the ratio of useful output energy to total input energy, construct and interpret Sankey diagrams, and calculate work done using work = force × distance
Typical age: 12–13 years
“If your child heard that a light bulb is 10% efficient and uses 60 J of energy, could they work out how much of that energy actually becomes light — and where the rest goes?”
0 / 4 mastered
Explore graph
Needs first
- Energy can't be created or destroyedREQUIRED
Efficiency calculations quantify how much energy is conserved vs dissipated — conservation and dissipation must be understood first
- Resultant Forces
Work done = force × distance links energy to mechanics — understanding forces as vectors provides the context
- Calculating Percentages
Calculating energy efficiency as a percentage requires percentage calculation skills from Math