Ask question

Ask question

All categories

strojnjashka [21]

3 years ago

15

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

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.

You might be interested in

The phenomenon of water sticking to a surface, such as a window pane or

Korolek [52]

Answer:

Because of the Cohesion

4 0

2 years ago

Read 2 more answers

Without friction, what is the mass of an ball accelerating at 1.8 m/sec2 to which an

Juli2301 [7.4K]

Answer:

<h2>23.33 kg </h2>

Explanation:

The mass of the object can be found by using the formula

$m = \frac{f}{a} \\$

f is the force

a is the acceleration

From the question we have

$m = \frac{42}{1.8} = 23.3333... \\$

We have the final answer as

<h3>23.33 kg</h3>

Hope this helps you

4 0

2 years ago

Read 2 more answers

A flute player hears four beats per second when she compares her note to a 523 HzHz tuning fork (the note C). She can match the

laiz [17]

Answer:

527 Hz

Solution:

As per the question:

Beat frequency of the player, $\Delta f = 4\ beats/s$

Frequency of the tuning fork, f = 523 Hz

Now,

The initial frequency can be calculated as:

$\Delta f = f - f_{i}$

$f_{i} = f \pm \Delta f$

when

$f_{i} = f + \Delta f = 523 + 4 = 527 Hz$

when

$f_{i} = f - \Delta f = 523 - 4 = 519 Hz$

But we know that as the length of the flute increases the frequency decreases

Hence, the initial frequency must be 527 Hz

7 0

3 years ago

Read 2 more answers

A train increase its speed steadily from 10m/s to 20m/s in 1minutes A what is the average speed during this time in m/s B how fa

Ipatiy [6.2K]

If it increased its speed steadily at a constant rate, then the average speed for the minute was

(1/2)(10m/s + 20m/s) = 15 m/s .

Rolling at an average speed of 15 m/s for 1 minute (60 seconds), it travels

(15 m/s) (60 sec) = 900 meters

3 0

4 years ago

A clarinetist, setting out for a performance, grabs his 3.010 kg clarinet case (including the clarinet) from the top of the pian

KATRIN_1 [288]

Answer:

-0.481 m/s^2

Explanation:

The force equation of this problem is given as:

F - W = ma

where F = upward force holding the clarinet bag

W = downward force (weight of the clarinet)

The mass of the clarinet bag is 3.010 kg, therefore, its weight is:

W = mg

W = 3.010 * 9.8 = 29.498

F = 28.05 N

Therefore:

28.05 - 29.498 = 3.010 * a

-1.448 = 3.010a

=> a = -1.448 / 3.010

a = -0.481 m/s^2

The acceleration of the bag is downward.

8 0

3 years ago