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taurus [48]
3 years ago
12

Pls answer fast in five mins​

Computers and Technology
1 answer:
Makovka662 [10]3 years ago
8 0

The answer is true!! I hope this helps!!

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1.Electromagnetic waves can carry more data at higher frequencies. Why would a scientist opt to transmit data at a lower frequen
skad [1K]
1)The reason as to why scientists opt to transmit data at lower frequency  instead of electromagnetic even if it can carry more data at a higher frequencies is because using higher frequencies of electromagnetic spectrum travel shorter distances but have higher data carrying capacity.So this physical characteristic of electromagnetic waves limits the range and availability of frequencies for sending information.
2) Limitations of using electromagnetic waves in sending communication
communication is a process of transmitting and receiving information in the form of signals.high technology communication use electromagnetic waves,there are various types of electromagnetic waves which are used in communication which include radio-waves,microwaves,infrared  e.t.c some of their limitations are
i)Because there is limited number of broadcast frequencies the use of transmitters must be restricted  in some way or they will seriously interfere with each other.
ii)Through the air signals can be distorted by atmospheric conditions and signals from space are sometimes distorted by solar activity
iii)physical activities such as mountains and buildings can prevent or interfere with some transmissions
iv)Through the air signals are not private,so any tuned receiver within the range can pick up them.
3)Differences between digital and analogue signals
Analogue and digital signal are used to transmit information usually through electric signals.
An analogue signal is continuous wave denoted by sine wave and may varry in signal strength (amplitude) or frequency(time) an example is sound from human voice is analogue because waves are continuous..
A digital signal is a signal in which the original information is converted into a string of bits before being transmitted .example a must for computer processing where is described as using (0s and 1s)and therefore can not take any fractional value.
4)Advantages of using digital signals over analogue signals
one advantage of digital signals are inherently less susceptible than analog signals to interference caused by noise because with digital signal it is not necessary to evaluate precise amplitude,frequency or phase.
Another advantage based in capacity is that digital signals carry more information per second than analogue signals.
Digital signals maintain their quality over long distances better than analogue signals.
5)How we use digital and analogue signals in our everyday live
digital signal processing is the way of life of current generation 
example is mobile phones do alot of digital signal processing .they process our our speech digitally to remove background noise,echo  e.t.c
Television also do a lot of digital processing of video,audio signal to present them in a better way.
How radio telescopes are used to explore space
A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy.It has several main parts, a dish and antenna,a receiver,a detector and an analyzer.The dish collects the radio signals from space ad focuses them on the antenna.
6)How radio waves are used on earth
Radio waves are used to transmit television and radio programs They have longer wave lengths and are reflected by the ionosphere
7) Reasons why telescopes convert radio waves (analog) to electrical(digital) signals for analysis
This is because signals can be easily stored and transmitted in digital form.The analog is continuous in time and it is necessary to convert this to a flow of digital values.
7 0
3 years ago
BADM-Provide a reflection of at least 500 words (or 2 pages double spaced) of how the knowledge, skills, or theories of this cou
barxatty [35]

Answer:

WooW We Have To All This Which Class can you Please tell

5 0
2 years ago
The replacer parameter of the stringify method accepts a/an ______________ or an array.
Elina [12.6K]

Answer:

The answer is function

Explanation:

As a function, it accepts two parameters: the value and the key being stringified.  It can be used to change the value of the entries or eliminate them. As an array, it specifies by name which entries and names of the properties in the object to include in the resulting JSON string.

7 0
3 years ago
Patronage of most Medieval musicians was supplied by the
Arturiano [62]

Answer:

wrong^^its church

Explanation:

3 0
3 years ago
You are testing a site and realize that when you click a graphic link you see an outline but no picture. What is wrong with the
deff fn [24]

Pictures not loading on websites Chrome – Many users reported that pictures aren't loading on websites in Chrome. To fix the problem, be sure to check your Chrome settings and disable your antivirus. Images won't load in Chrome – Sometimes this issue can appear if JavaScript is disabled in your browser.

Explanation:

Speaking of image problems, users reported the following issues:

  • Broken image icon Firefox, Internet Explorer – According to users, you might be able to experience this issue in other browsers including Firefox and Internet Explorer. If the problem appears in other browsers, the issue is related to your system or to your network configuration.
  • Pictures not loading on websites Chrome – Many users reported that pictures aren’t loading on websites in Chrome. To fix the problem, be sure to check your Chrome settings and disable your antivirus.
  • Images won’t load in Chrome – Sometimes this issue can appear if JavaScript is disabled in your browser. If that’s the case, simply enable JavaScript and the problem will be resolved.
  • Chrome showing broken images – In some cases, extensions can lead to this problem, and if you noticed that your images are missing, simply disable or uninstall your extensions and check if that solves the problem.
  • You can remove an image from the preview by clicking the thumbnail below Available images. Edit Descriptions: If you've added multiple images, click the description below each image in the preview to edit it.
  • Icon in the top-right corner of the window. Select Internet Options. In the Internet Options window, click the Advanced tab. In the Settings under Multimedia, make sure there is a check in the Show Pictures check box.
7 0
2 years ago
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