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strojnjashka [21]
3 years ago
15

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

Physics
2 answers:
Anni [7]3 years ago
7 0

<em>Mechanical waves need a medium through which to transport energy is true</em>

Answer: <em>True </em>

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

  • <em>Transverse wave </em>
  • <em>Longitudinal wave </em>
  • <em>Surface wave </em>

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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valentinak56 [21]

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A dump truck going 70 mph

Explanation:

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3 years ago
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vovikov84 [41]
Based on Newton's second law of motion, the net force applied to an object is equal to the product of the mass of the object and the acceleration it experiences. That is,
  
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3 years ago
A woman can row her canoe at 2.5 m/s. If she faces an opposing current of 3.0 m/s, how fast will she go forward?
taurus [48]

Answer:

V = - 0.5 [m/s]

Explanation:

In order to solve this problem, we must use the principle of relative speeds. This is for an observer who is on the edge of the river he can see how the river moves to the left and the woman tries to move to the right but can not since:

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That is, the person sees how the woman moves to the left but with avelocity of 0.5 [m/s] to the left

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During which month is the bacteria population just under 1 million?
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a block measures 3.5 cm long 2.8 cm wide and 1.6 cm deep. the density of the block 2.5 g/cm. calculate the volume of the block.
luda_lava [24]
Volume of a block can be found by: length × width × height. So:

3.5cm × 2.8cm × 1.6cm = 15.68cm^3
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