No, the speed of sound cannot be measured exactly as the velocity of light (c) in a vacuum. The speed of sound depends on the medium through which it propagates, such as air, water, or solids. In a given medium, the speed of sound is determined by the properties of that medium, including its density, compressibility, and temperature.
Einstein's equation E=mc² relates energy (E) to mass (m) and the speed of light (c). It describes the equivalence of mass and energy, stating that mass can be converted into energy and vice versa. However, this equation is specifically applicable to objects with mass, not to phenomena like the speed of sound, which involve the propagation of pressure waves through a medium.
The equation E=mc² is derived from special relativity, which deals with objects moving at speeds close to the speed of light. It describes the relationship between energy and mass for such objects, and it has profound implications for particle physics and nuclear reactions.
To explain the speed of sound using E=mc² is not appropriate because sound does not involve the conversion of mass into energy or vice versa. It is a mechanical wave that propagates through a medium by displacing particles and transferring energy from one particle to another.
Instead, the speed of sound is determined by the mechanical properties of the medium, such as the elasticity and density, and can be calculated using specific formulas based on these properties.