Answered

Waves that move the particles of the medium parallel to the direction in which the waves are traveling are called

Alongitudinal waves.
Btransverse waves.
Csurface waves.
Dcombination waves.

Mechanical waves that travel through

Aa vacuum
Bouter space
Ca black hole
Da medium

Analogue signals transmit information for such things as _____________.

AAM/FM radio
Cdigital cable
Bdigital radio
Dsatellite radio

Verified Answer :

skyluke89

1. a. longitudinal waves.

There are two types of waves:

- Transverse waves: in transverse waves, the oscillations of the wave occur in a direction perpendicular to the direction of propagation of the wave

- Longitudinal waves: in longitudinal waves, the oscillations of the waves occur parallel to the direction in which the waves are travelling.

So, these types of waves are called longitudinal waves.


2. d. a medium

There are two types of waves:

- Electromagnetic waves: these waves are produced by the oscillations of electric and magnetic field, and they can travel both in a medium and also in a vacuum (they do not need a medium to propagate)

- Mechanical waves: these waves are produced by the oscillations of the particles in a medium, so they need a medium to propagate - therefore, the correct choice is d. a medium


3. a. AM/FM radio

Analogue signals consist of continuous signals, which vary in a continuous range of values. On the contrary, digital signals consist of discrete signals, which can assume only some discrete values. For AM and FM radios, signals are transmitted by using analogue signals.

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