Which part of the electromagnetic spectrum is divided into seven ranges of wavelengths and is the part visible to the human eye? visible light

television waves

telemetry waves

infrared light Which statement correctly compares radio waves and microwaves?

Radio waves have longer wavelengths and lower frequencies than microwaves.

Radio waves have shorter wavelengths and higher frequencies than microwaves.

Radio waves have shorter wavelengths and lower frequencies than microwaves.

Radio waves have longer wavelengths and higher frequencies than microwaves.

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

The duration of a photographic flash is related to an rc time constantly

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.