All categories

3 years ago

Two ways that radio waves are used for transmitting information. Help me please.

Physics

1 answer:

Travka [436]3 years ago

3 0

1. Stop transmitting start and stop sending photons. This is typical morse code like transmissions of information. By varying the pattern of starts stops you vary the information sent. Also used in digital communications over radios, modems, and pulse dialing over radio/phones.

<span>2. Change the frequency. You use a pattern of shorter and longer wavelengths of radio waves higher and lower energies of individual photons to transmit information. This is frequency modulation </span>

You might be interested in

The phases of the moon depend on how much of the lighted side of the moon can be seen from Earth.

Ostrovityanka [42]

Answer:

true

Explanation:

if there is no light it's different from when there is

3 0

3 years ago

I need help on number 5. We need to use one of the four kinematics equations.

Gnom [1K]

ANSWER

$35.02m$

EXPLANATION

Parameters given:

Initial velocity, u = 26.2 m/s

When the vase reaches its maximum height, its velocity becomes 0 m/s. That is the final velocity.

We can now apply one of Newton's equations of motion to find the height:

$v^2=u^2-2as$

where a = g = acceleration due to gravity = 9.8 m/s²

Therefore, we have that:

$\begin{gathered} 0=26.2^2-2(9.8)s \\ \Rightarrow19.6s=686.44 \\ s=\frac{686.44}{19.6} \\ s=35.02m \end{gathered}$

That is the height that the vase will reach.

5 0

1 year ago

At a distance 30 m from a jet engine, intensity of sound is 10 W/m^2. What is the intensity at a distance 180 m?

AleksandrR [38]

Answer:

$I_{2}=0.27 W/m^2$

Explanation:

Intensity is given by the expresion:

$I_{2}=Io (\frac{r1}{r2} )^{2}$

where:

Io = inicial intensity

r1= initial distance

r= final distance

$I_{2}=10 W/m^2 (\frac{30m}{180m} )^{2}$

$I_{2}=0.27 W/m^2$

5 0

3 years ago

Plz i need to knowwwwwwwwwew asap

mario62 [17]

I can’t see it’s too blurry

6 0

3 years ago

Is it possible for an object to be going 100 miles per hour but have a velocity of zero?

Lesechka [4]

It is possible for on object to be going at 100 miles per hour, but still have a velocity. This is because the object going at 100 miles per hour has speed, which is a scalar quantity, which is defined by only magnitude, but the velocity of the object can be 0, since velocity is a vector quantity which is defined by both magnitude and direction.

Since this object only has magnitude and no direction (which is not given), then the velocity can be 0

5 0

3 years ago