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3 years ago

Explain the difference between sound waves and radio waves

Physics

1 answer:

uysha [10]3 years ago

6 0

Answer:

They are totally different.

Explanation:

However, sound and radio waves are completely different phenomena. Sound creates pressure variations (waves) in matter, such as air or water, or your eardrum. Conversely, radio waves are electromagnetic waves, like visible light, infrared, ultraviolet, X-rays, and gamma rays

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Starting from rest, a disk rotates about its central axis with constant angular acceleration. in 6.00 s, it rotates 44.5 rad. du

Klio2033 [76]

a. The disk starts at rest, so its angular displacement at time $t$ is

$\theta=\dfrac\alpha2t^2$

It rotates 44.5 rad in this time, so we have

$44.5\,\mathrm{rad}=\dfrac\alpha2(6.00\,\mathrm s)^2\implies\alpha=2.47\dfrac{\rm rad}{\mathrm s^2}$

b. Since acceleration is constant, the average angular velocity is

$\omega_{\rm avg}=\dfrac{\omega_f+\omega_i}2=\dfrac{\omega_f}2$

where $\omega_f$ is the angular velocity achieved after 6.00 s. The velocity of the disk at time $t$ is

$\omega=\alpha t$

so we have

$\omega_f=\left(2.47\dfrac{\rm rad}{\mathrm s^2}\right)(6.00\,\mathrm s)=14.8\dfrac{\rm rad}{\rm s}$

making the average velocity

$\omega_{\rm avg}=\dfrac{14.8\frac{\rm rad}{\rm s}}2=7.42\dfrac{\rm rad}{\rm s}$

Another way to find the average velocity is to compute it directly via

$\omega_{\rm avg}=\dfrac{\Delta\theta}{\Delta t}=\dfrac{44.5\,\rm rad}{6.00\,\rm s}=7.42\dfrac{\rm rad}{\rm s}$

c. We already found this using the first method in part (b),

$\omega=14.8\dfrac{\rm rad}{\rm s}$

d. We already know

$\theta=\dfrac\alpha2t^2$

so this is just a matter of plugging in $t=12.0\,\mathrm s$ . We get

$\theta=179\,\mathrm{rad}$

Or to make things slightly more interesting, we could have taken the end of the first 6.00 s interval to be the start of the next 6.00 s interval, so that

$\theta=44.5\,\mathrm{rad}+\left(14.8\dfrac{\rm rad}{\rm s}\right)t+\dfrac\alpha2t^2$

Then for $t=6.00\,\rm s$ we would get the same $\theta=179\,\rm rad$ .

7 0

4 years ago

Talk to a financial planner or an insurance agent about the financial difficulties faced by people who lack adequate home and au

adelina 88 [10]

Answer:

Answered

Explanation:

There are people out there who understand the value of insurance and want adequate coverage at a cheap rates. In my opinion, these are the best clients. You don't need to sell the person on the value of insurance; they all are ready to understand it. In my opinion, it may be difficult to work with people who do not fully understand the value of insurance. These are the people who usually want necessary minimum coverage at the absolute inexpensive cost. However, when they need to make a claim that they are usually shocked to find out, feeling how they don't any coverage.

6 0

3 years ago

Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the

Mashcka [7]

The melting point. So d is ur answer. The color and texture of both is the same. They sont have magnetism. So the only logical one is melting point.

Please vote brainliest

6 0

3 years ago

Read 2 more answers

Acceleration can be best described as:

zhuklara [117]

Answer:

The ability to speed up

Explanation:

Speed up since the motion is rising , thats acceleration

3 0

4 years ago

What is the mass of a tennis ball traveling with a velocity of 3 m/s and a momentum of

ELEN [110]

Answer:

Explanation:

P = mv

m = P/v

m = .25/3 = .08 Kg ... A

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3 years ago