Question

True or false mechanical waves need a medium through which to transport energy

Answer 1

Mechanical waves need a medium through which to transport energy is true

Answer: True

Explanation:

Mechanical wave cannot travel in the absence of a material medium. The reason why sound can’t be heard in vacuum is because it is a mechanical wave. Seismic wave, which is produced during earthquakes and ocean waves are also mechanical waves.

Mechanical waves are of three types and they are

• Transverse wave

• Longitudinal wave

• Surface wave

Electromagnetic waves are known for their propagation without a material medium. X-rays, light waves, infrared waves etc are electromagnetic waves.

Characteristic features of a wave are its frequency, wavelength, speed etc.

Answer 2

Answer:True

Explanation: The mechanical waves need a medium through which to transport energy because the perturbation travels inside of the medium so it needs molecules that connect elastically the displacement of the wave. For example the sound mainly uses the air molecules to transport the energy also the sound can be traveled in solid materials like metal rods.