Identify the four forms of energy included in the General Energy Equation.

Identify the four forms of energy included in the General Energy Equation.

• A. Potential Energy (PE), Kinetic Energy (KE), Flow Energy (FE), Internal Energy (U)
• B. Chemical Energy, Thermal Energy, Nuclear Energy, Magnetic Energy
• C. Gravitational Energy, Elastic Energy, Electrical Energy, Radiant Energy
• D. Free Energy, Enthalpy, Entropy, Temperature

Answer: (A)

In the General Energy Equation for a control-volume flow, energy carried by a fluid is accounted for in four forms. Kinetic energy is the energy of motion, proportional to velocity squared. Potential energy comes from the fluid’s position in a gravitational field, proportional to height. Flow energy, or flow work, represents the energy required to push the fluid into and out of the control volume, often written per unit mass as p/ρ. Internal energy is the microscopic energy of the fluid molecules, related to temperature and molecular structure. The total energy per unit mass is the sum of these: v^2/2 + g z + p/ρ + u. These four terms—kinetic, potential, flow energy, and internal energy—together form the general energy balance used for typical fluid-flow problems, which is why that option is the best match. Other energy forms like chemical, magnetic, or radiant energy aren’t part of this standard decomposition unless a special situation is being modeled, so they’re not included in the general equation.

In the General Energy Equation for a control-volume flow, energy carried by a fluid is accounted for in four forms. Kinetic energy is the energy of motion, proportional to velocity squared. Potential energy comes from the fluid’s position in a gravitational field, proportional to height. Flow energy, or flow work, represents the energy required to push the fluid into and out of the control volume, often written per unit mass as p/ρ. Internal energy is the microscopic energy of the fluid molecules, related to temperature and molecular structure. The total energy per unit mass is the sum of these: v^2/2 + g z + p/ρ + u. These four terms—kinetic, potential, flow energy, and internal energy—together form the general energy balance used for typical fluid-flow problems, which is why that option is the best match. Other energy forms like chemical, magnetic, or radiant energy aren’t part of this standard decomposition unless a special situation is being modeled, so they’re not included in the general equation.