Fluid Mechanics is a core subject in mechanical engineering that deals with the behavior of fluids (liquids and gases) under various conditions. It plays a vital role in the design and analysis of pumps, turbines, aircraft, pipelines, and hydraulic systems.

The subject is divided into:
1️⃣ Fluid Statics – Study of fluids at rest, including pressure distribution and buoyancy.
2️⃣ Fluid Dynamics – Analysis of fluids in motion, covering concepts like viscosity, turbulence, and flow rate.

Understanding fluid mechanics is essential for optimizing aerodynamics, energy systems, HVAC (Heating, Ventilation, and Air Conditioning), and hydraulic machines in real-world engineering applications.

Heat transfer is a fundamental subject in mechanical engineering that deals with the movement of thermal energy between physical systems. It plays a crucial role in the design and optimization of engines, power plants, refrigeration systems, and electronic cooling devices.

The subject is broadly classified into three modes of heat transfer:
1️⃣ Conduction – Heat transfer through solid materials via molecular vibrations.
2️⃣ Convection – Heat transfer in fluids due to bulk motion.
3️⃣ Radiation – Heat transfer through electromagnetic waves, independent of a medium.

Understanding heat transfer principles helps engineers develop efficient thermal systems, improve energy conservation, and design advanced cooling technologies for various industrial applications.