1) Angular motion can be described using equations that relate angle, angular velocity, angular acceleration, linear distance, velocity, acceleration, force, moment of inertia, and torque. 2) A Carnot engine uses heat from a high temperature source to do mechanical work and move heat to a low temperature sink, with maximum possible efficiency determined by temperature differences. 3) Fluid properties like density, pressure, buoyancy, flow rate, and Bernoulli's equation relate forces, volumes, areas, velocities, and fluid dynamics.