: Atmospheric pressure and pressure in liquids and gases.
The 8th-grade textbook shifts focus toward thermodynamics and the fundamentals of electricity. Физика 9 gdz po fizike klass k uchebnikul.a isachenkova
: Atoms, molecules, and the three states of matter (solid, liquid, gas). Interaction of Bodies : Force, mass, density, and friction. : Atmospheric pressure and pressure in liquids and gases
: Physical bodies, phenomena, and measurements. gas). Interaction of Bodies : Force
: Mechanical work, power, and simple machines (blocks, levers).