IB Physics SL A 3 1 Conservation of Energy Questions

Practise tracing energy transfers in hydroelectric, thermal and wind systems, then using conservation of energy to explain stores, losses and useful output.

Exam points

Apply the principle of conservation of energy to account for energy transfers between stores in a closed system.
Track useful, dissipated and transferred energy quantitatively using complete mark-scheme evidence and consistent units.

[Maximum number: 2]

This question is in two parts. Part 1 is about energy resources. Part 2 is about thermal physics.
Part 1 Energy resources
Electricity can be generated using nuclear fission, by burning fossil fuels or using pump storage hydroelectric schemes.

A mass of 0.22 kg of lead spheres is placed in a well-insulated tube. The tube is turned upside down several times so that the spheres fall through an average height of 0.45 m each time the tube is turned. The temperature of the spheres is found to increase by $8^{\circ} \mathrm{C}$ .

Figure for Question IB Physics SL A 3 1 Conservation of Energy Questions question 1 — IB Physics SL

Discuss the changes to the energy of the lead spheres.

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IB Physics SL A 3 1 Conservation of Energy Questions question 1