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

Physics

2 answers:

Anni [7]3 years ago

7 0

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.

a_sh-v [17]3 years ago

4 0

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.

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3 years ago

If an object with more mass is pushed with the same force as an object with less mass the object with more mass will accelerate?

expeople1 [14]

Answer:

smaller acceleration, so lower change in velocity

Explanation:

To answer this question we examine the equation that relates mass with force and with acceleration: $F=m*a$ .

Since we want to know what happens to the acceleration, we solve for it in the equation: $a=\frac{F}{m}$

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We therefore would have to compare our initial form:

$a=\frac{F}{m}$ with the new one: $a=\frac{F}{M}$ wher the denominator is a larger quantity, therefore making our division/quotient smaller. Then, we conclude that the acceleration will be smaller, and therefore the change in velocity of the object will be lower.