Grade 12 Thermal physics worksheet

What is on the worksheet

1. For a uniform slab, k = 0.8 W/(m·K), area = 8 m², thickness = 20 cm and temperature difference = 6 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

2. For a uniform slab, k = 0.6 W/(m·K), area = 12 m², thickness = 7 cm and temperature difference = 30 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

3. Mix 8 kg at 20 °C with 3 kg at 53 °C of the same liquid. Assume equal constant specific heat, no phase change, negligible container heat capacity and no losses. Find equilibrium temperature. Round to 3 decimal places if needed. Answer in °C.

4. For a uniform slab, k = 0.4 W/(m·K), area = 16 m², thickness = 3 cm and temperature difference = 22 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

5. A 1.7 kg sample with specific heat 4200 J/(kg·°C) warms by 8 °C. No phase change or heat loss occurs. Find energy supplied. Round to 3 decimal places if needed. Answer in J.

6. For a uniform slab, k = 0.5 W/(m·K), area = 13 m², thickness = 17 cm and temperature difference = 27 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

7. Mix 7 kg at 21 °C with 4 kg at 75 °C of the same liquid. Assume equal constant specific heat, no phase change, negligible container heat capacity and no losses. Find equilibrium temperature. Round to 3 decimal places if needed. Answer in °C.

8. A 760 g sample completely melts at its melting temperature. Its latent heat is 310000 J/kg. Ignore losses. Find energy required. Round to 3 decimal places if needed. Answer in J.

9. Mix 6 kg at 19 °C with 10 kg at 67 °C of the same liquid. Assume equal constant specific heat, no phase change, negligible container heat capacity and no losses. Find equilibrium temperature. Round to 3 decimal places if needed. Answer in °C.

10. Mix 2 kg at 28 °C with 10 kg at 63 °C of the same liquid. Assume equal constant specific heat, no phase change, negligible container heat capacity and no losses. Find equilibrium temperature. Round to 3 decimal places if needed. Answer in °C.

11. Mix 4 kg at 29 °C with 2 kg at 57 °C of the same liquid. Assume equal constant specific heat, no phase change, negligible container heat capacity and no losses. Find equilibrium temperature. Round to 3 decimal places if needed. Answer in °C.

12. For a uniform slab, k = 0.7 W/(m·K), area = 3 m², thickness = 14 cm and temperature difference = 23 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

13. Mix 1 kg at 17 °C with 6 kg at 73 °C of the same liquid. Assume equal constant specific heat, no phase change, negligible container heat capacity and no losses. Find equilibrium temperature. Round to 3 decimal places if needed. Answer in °C.

14. For a uniform slab, k = 0.4 W/(m·K), area = 8 m², thickness = 20 cm and temperature difference = 17 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

15. For a uniform slab, k = 0.8 W/(m·K), area = 19 m², thickness = 18 cm and temperature difference = 10 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

16. For a uniform slab, k = 0.9 W/(m·K), area = 8 m², thickness = 20 cm and temperature difference = 31 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

17. A 2 kg sample with specific heat 2100 J/(kg·°C) warms by 14 °C. No phase change or heat loss occurs. Find energy supplied. Round to 3 decimal places if needed. Answer in J.

18. For a uniform slab, k = 0.6 W/(m·K), area = 2 m², thickness = 7 cm and temperature difference = 15 K. Assuming steady one-dimensional conduction, find thermal power. Round to 3 decimal places if needed. Answer in W.

19. A 760 g sample completely melts at its melting temperature. Its latent heat is 350000 J/kg. Ignore losses. Find energy required. Round to 3 decimal places if needed. Answer in J.

20. A 700 g sample completely melts at its melting temperature. Its latent heat is 160000 J/kg. Ignore losses. Find energy required. Round to 3 decimal places if needed. Answer in J.