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jolli1 [7]
4 years ago
11

Which terms describe the purpose of antennas on devices that use radio waves

Physics
1 answer:
FrozenT [24]4 years ago
8 0

Answer:

The terms are

1. Transmit

2. Receive

Explanation:

What is an antenna

According to NASA

An antenna is a metallic structure that captures and/or transmits radio electromagnetic waves. Antennas come in all shapes and sizes from little ones that can be found on the roof to watch TV to really big ones that capture signals from satellites millions of miles away.

How does an antenna work?

Antennas are much more than simple devices connected to every radio. They're the transducers that convert the voltage from a transmitter into a radio signal. And they pick radio signals out of the air and convert them into a voltage for recovery in a receiver

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In order to change power, what else must be changed?
Genrish500 [490]

<span>In order to change power, current or voltage should also be changed. Voltage is an electromotive force, and also the quantitative expression that shows the potential difference of the two points charged in an electrical field.  So, before power will take place, it would always be best to change also the voltage.</span>

6 0
3 years ago
Read 2 more answers
while looking at a graph, you notice a period of time where the line is perfectly horizontal what is most likely taking place du
aev [14]

Answer:

where the y axis is

Explanation:

In more simple terms, a horizontal line on any chart is where the y-axis values are equal. If it has been drawn to show a series of highs in the data, a data point moving above the horizontal line would indicate a rise in the y-axis value over recent values in the data sample.

7 0
3 years ago
Do you think it is possible to determine an object is moving towards you, or moving away from you just by how it sounds? If
Nataly_w [17]

Answer:

I think so

Explanation:

When the object is moving towards you the sound gets louder but when it's moving away it sounds farther away.

6 0
3 years ago
The velocity of a car traveling in a straight line increases from 0 meters/second to 30meters/second in 8 seconds. What is the a
Yuri [45]

The equation you need to know in order to solve this problem is v=v0+at, where v is final velocity, v0 is initial velocity, a is acceleration, and t is time.  Plug in and solve:

30=0+a(8)

30=8a

<em>*Divide both sides by 8*</em>

a=3/75m/s^2

Hope this helps!!

7 0
3 years ago
A thin film of alcohol (n = 1.36) lies on a flat glass plate (n = 1.51). When monochromatic light, whose wavelength λ can be cha
Shkiper50 [21]

Answer:

The thickness of the film, t = 470.59 nm

Explanation:

\lambda_{film} = \frac{\lambda}{n_{film} }

For constructive interference, the net phase change, \phi = \phi_{2} -  \phi_{1} = 2\pi m_{1}

Then the thickness,  t = 0.5 \lambda_{film} m_{1}

m₁ = 1,2,3........

t = 0.5\frac{\lambda_{1} }{n_{film} } m_{1}..............(i)

For destructive interference, the net phase change is  \phi = \phi_{2} -  \phi_{1} = 2(m_{2} + 1)\pi

m₂ = 1,2,3........

thickness, t = 0.5\frac{\lambda_{1} }{n_{film} }(2 m_{2}+1)..............(ii)

Equating (i) and (ii)

0.5\frac{\lambda_{1} }{n_{film} } m_{1} = 0.5\frac{\lambda_{1} }{n_{film} }(2 m_{2}+1)

\frac{2m_{2} + 1}{2m_{1} } = \frac{\lambda_{1} }{\lambda_{2}} = \frac{640}{512}

\frac{2m_{2} + 1}{2m_{1} } = 1.25.............(iii)

From (iii), When m₁ =2, m₂ = 2

The thickness , t = 0.5\frac{\lambda_{1} }{n_{film} } m_{1} then becomes

t = 0.5\frac{640}{1.36} *2

t = 470.59 nm

7 0
3 years ago
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