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3 years ago

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(Brainliest) How are radio waves used in cell phone wireless communication technology?

1 answer:

poizon [28]3 years ago

5 0

Radio waves are used in cell phone wireless communication by this: Radio waves are released from the cell phone and travel to satellites in the stratosphere. After they reach the satellite, they are redirected to the recipient of the call/text.

Hope this helps! Can I have brainliest please?

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Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a

blagie [28]

Answer:

The maximum speed at which the car can safety travel around the track is 18.6m/s.

Explanation:

Since the car is in circular motion, there has to be a centripetal force $F_c$ . In this case, the only force that applies for that is the static frictional force $f_s$ between the tires and the track. Then, we can write that:

$f_s=F_c$

And since $f_s\leq \mu N$ and $F_c=\frac{mv^{2}}{r}$ , we have:

$\mu N\geq \frac{mv^{2}}{r}$

Now, if we write the vertical equation of motion of the car (in which there are only the weight and the normal force), we obtain:

$N-mg=0\\\\\\implies N=mg$

Substituting this expression for $N$ and solving for $v$ , we get:

$\mu mg\geq \frac{mv^{2}}{r}\\\\v\leq \sqrt{\mu gr}$

Finally, plugging in the given values for the coefficient of friction and the radius of the track, we have:

$v\leq \sqrt{(0.42)(9.81m/s^{2})(84.0m)}\\\\v\leq 18.6m/s$

It means that in its maximum value, the speed of the car is equal to 18.6m/s.

7 0

3 years ago

Read 2 more answers

a snooker ball travels 4 meters, diagonally across the table it travels at a speed of 5m/s. calculate how long the ball is trave

Korvikt [17]

Answer:

4 secs

Explanation:

I am right trust me

6 0

3 years ago

N2O is the chemical formula of a covalent compound used in the production of whipping cream. The elements that

WARRIOR [948]

N₂O: Nitrous oxide

oxygen

5 0

2 years ago

Why are aftershocks dangerous to buildings after a large earthquake

Katen [24]

because the building are weaker and they are most likley to fall

6 0

3 years ago

What is nuclear power

katrin2010 [14]

Answer:

<h2><em><u>D. All of the statements describe nuclear power</u></em></h2>

What is <em><u>NUCLEAR</u></em><em><u> </u></em><em><u>POWER</u></em><em><u>?</u></em><em><u> </u></em>

➡️ is the <u>use of nuclear</u> <u>reactions</u> to <u>produce electricity</u>.

➡️ it can be <u>obtained from nuclear</u> <u>fission, nuclear decay and nuclear fusion reactions. </u>

Hope it helps

3 0

2 years ago