In order to transmit information via radio waves, the waves need to be changed somehow. For car radios this can happen in two ways. For AM radios, which property of the carrier wave is modulated before it is transmitted? o amplitude o frequency o period For FM radios, which property of the carrier wave is modulated before it is transmitted? a. amplitude b. frequency c. period

Answerit increases at a steady rate;

Answervery cold;

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.