The Eckart equation

The Eckart equation describes how the speed of sound in a gas depends on its temperature, pressure, and molecular properties. Essentially, it provides a way to relate the microscopic characteristics of gas molecules—such as their mass, energy levels, and how they collide—to the macroscopic speed at which sound waves travel through the gas. This equation is important for understanding behaviors in fields like acoustics, atmospheric science, and combustion, where knowing how fast sound moves helps in analyzing and predicting physical phenomena involving gases.