Content of the book: Power and Motion: 13. Interactions, 14. Forces, 15. Velocity, 16. Acceleration, 17. Pressure, 18. Balance and leverage, 19. Work and force; Heat: 20. Temperature and heat, 21. Heat transfer, 22. Thermal expansion, 23. Changes in physical state, 24. Storage of thermal energy, 25. Heaters at home, 26. Energy production and energy sources