electromagnetic vs. mechanical\nspeed\nelectromagnetic mechanical\nthis graph is accurate because ...\na…

electromagnetic vs. mechanical\nspeed\nelectromagnetic mechanical\nthis graph is accurate because ...\na mechanical waves move faster than electromagnetic waves.\nb electromagnetic waves cannot travel through a vacuum.\nc mechanical waves cannot travel through a medium.\nd electromagnetic waves move faster than mechanical waves.

electromagnetic vs. mechanical\nspeed\nelectromagnetic mechanical\nthis graph is accurate because ...\na mechanical waves move faster than electromagnetic waves.\nb electromagnetic waves cannot travel through a vacuum.\nc mechanical waves cannot travel through a medium.\nd electromagnetic waves move faster than mechanical waves.

Answer

Brief Explanations:

Electromagnetic waves travel at the speed of light in a vacuum ($3\times10^{8}$ m/s), while mechanical waves' speeds vary greatly depending on the medium but are generally much slower. For example, sound (a mechanical wave) travels at about 343 m/s in air at room - temperature.

Answer:

D. electromagnetic waves move faster than mechanical waves.