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Gemiola [76]
4 years ago
11

Which kind of radio waves are used by television stations to carry sound?

Physics
1 answer:
pochemuha4 years ago
5 0
They are called <span>Frequency-modulated</span>
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Marisa’s car accelerates at an average rate of 2.6m/s^2. Calculate how long it takes her car to accelerate from 24.6m/s to 26.8m
djverab [1.8K]

given info is... Acceleration(a)=2.6m/s^2

                       final velocity(v)=26.8m/s

                       initial velocity(u)=24.6m/s

need to find.... time(t)=?

a=\frac{v-u}{t} \\2.6=\frac{26.8-24.6}{t} \\\\

t=\frac{v-u}{a}

t=\frac{26.8-24.6}{2.6}

t=0.846s

Explanation:

8 0
3 years ago
A student pushes a 50-N box across the floor a distance of 15 m. How much work was done to move the box?
irinina [24]

Answer:750

Explanation:

50 times 15

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As we learn more, _________ are often revised. scientific laws scientific theories observation experiments
DiKsa [7]
Here is the answer that would best complete the given statement above. <span>As we learn more, SCIENTIFIC THEORIES are often revised. Scientific theories are considered as the substantial explanation of some aspect of the natural world which are gathered through scientific method. Hope this is the answer that you are looking for.</span>
4 0
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If the angle of incidence of a light source to a shiny surface is 30 degrees, what will the angle
Virty [35]
<h3>Answer: D) 30</h3>

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5 0
3 years ago
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Constants Modern wind turbines are larger than they appear, and despite their apparently lazy motion, the speed of the blades ti
nadezda [96]

It is given that the length of blade of the turbine is 58 m.

During the motion, the turbine will undergo rotational motion. Hence the radius of the circle traced by the turbine is equal to the length of the blade.

Hence radius r = 58 m.

The frequency of the turbine [f] =14 rpm.

Here rpm stands for rotation per minute.

Hence the frequency of the turbine in one second-

                                                      f=\frac{14}{60}\ s^-1

                                                      f=0.23333 Hz

Here Hz[ hertz] is the unit of frequency.

The angular velocity of the turbine \omega =2\pi f

                                                          \omega=2*3.14*0.2333

                                                          \omega=1.465124 radian/second

Now we have to calculate the centripetal  acceleration of the blade.

Let the linear velocity of the blade is v.

we know that  linear velocity v=ωr

The centripetal acceleration is calculated as-

                                                                      a_{c} =\frac{v^2}{r}

                                                                            =\frac{[\omega r]^2}{r}

                                                                            =\omega^2r

                                                                            =[1.465124]^2 *58

                                                                            =124.5021234 m/s^2      [ans]

8 0
3 years ago
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