Answer: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.
Explanation:
couldnt make my own so...
Answer:
Explanation:
READ THIS AND ANSWER THE QUESTIONS BELOW!!!!!!!!!1
Celestial bodies emit different types of radiation, only some of which can be detected by traditional telescopes. Radio waves are invisible rays that can be detected only by radio telescopes. A radio telescope functions like a television antenna. Radio waves from space are sensed by a gigantic parabolic reflector, which concentrates them toward the top of a focusing antenna. A radio receptor converts the radio waves into electrical signals which are amplified and then transmitted to the center of the parabola. They are then recorded and analyzed in the laboratory so that scientists can obtain a radio image of the source observed. The parabolic antenna can usually be oriented to detect radio waves from all directions of space. Some radio telescopes are fixed. The largest radio telescope in the world, located in Arecibo, Puerto Rico, is fixed. Built in a natural valley shaped like a giant parabola, its reflector measures 305 meters in diameter. Mobile detectors suspended from cables permit the scanning of one of part of the sky. Unlike traditional telescopes, radio telescopes can be used both day and night, even when there is cloud cover.
Electromagnetic waves can carry more data at higher frequencies. Why would a scientist opt to transmit data at a lower frequency instead?
What are the limitations of sending information using electromagnetic waves?
What are the differences between analog and digital signals?
What are the advantages of using digital signals over analog signals?
Using reliable internet sources, identify three ways we use analog and digital signals in our everyday lives.
Answer:
Explanation:
Which food combination produces a protein complete meal?
white rice and broccoli
brown rice and beans
white bread and cheese
peanut butter and jelly
Answer:
brown rice and beans
Explanation:
because the rice is really filling and healthy while beans have proteins
Answer:
the second option
Explanation:
hope this helps
PLZZ HELPPP FRLLL IM GONNA GET MY LIFE ENDED
Help,
The question is down below
Answer:
C. A new gas was created and the gas took up more space
Answer:
C
Explanation:
If Vanadium has an atomic number of 23 and an atomic mass of 50.9425u, how many neutrons are in one atom of Vanadium?
23
28
51
make it look messy
Weather refers to short term atmospheric conditions while climate is the weather of a specific region averaged over a long period of time.
how many moles of water are produced from the reaction of 50.0g of methane?
6.25 moles of H₂O are produced from the reaction of 50.0g of methane.
Number of moles:It is defined as given mass over molar mass.
Number of moles = Given mass / Molar mass
Given:
Mass of CH₄ = 50grams
Molar mass of CH₄ = 16 g/mol
Number of moles = 50 / 16
Number of moles = 3.125 moles
The molar ratio of CH₄ to H₂O is 1:2.
This means that 1 mole of CH₄ produces 2 moles of H₂O.
So, 3.135 moles will produce 3.125*2 = 6.25 moles of H₂O.
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What are the physical properties of the cookie/cracker? List 3 or more.
Answer
cookie
shape:circle
texture: bumpy rough on side
color:brown
size: bigger than a quarter
Explanation:
I cant see it so just describe the color shape size texture
Answer:
1. Delicious
2. Soft
3. Cronchyy (ik its crunchy )
4. Best foods you will ever eat
Explanation:
Try it for yourself!
Which has more thermal energy: a snowman or a lit match?
Group of answer choices
snowman
lit match
No answer text provided.
Another oddly specific question reeeeeeeeee. What causes the difference in air pressure around the Earth? A.
The warm air sinks at the poles and cold air rises at the equator.
B.
The warm air rises at the equator and cold air rises at the poles.
C.
The warm air sinks at the equator and cold air rises at the poles.
D.
The warm air rises at the equator and cold air sinks at the poles.
Answer:
A
Explanation:
Answer: The answer would be A!
Explanation: Hope I helped you! ^^
ASAP ILL MARK BRAINLIEST!!!!!! EASY
1. What is ocean acidification? How might it impact global biodiversity?
2. How can you as an individual help tackle this problem? (What specifically can you do?)
Answer:
1.Our results indicate that, at higher biodiversity, the impact of acidification on otherwise highly vulnerable key organisms can be reduced by 50 to >90%, depending on the species
2.Positive attitude is sometimes all it takes to turn a bad situation around. On the other side, a bad attitude can take a problem and quickly make it worse. Helps You Make Good Decisions – Anger clouds your judgement. When you let yourself get upset, you impact your ability to make good decisions.
PLease help Will give brainliest
Answer:
um ewww
Explanation:
10. i think is c
11. i think i d
Hope this helps!
In which direction does heat move?
Group of answer choices
hot to cold
cold to hot
It can move in either direction.
Pls help asap!!! BrainIdentify one source of carbon that can be found in each of these four spheres: atmosphere (air), geosphere (land), biosphere (living organisms) and hydrosphere (water).
liest to correct answer!!!
Answer:
It is carbon dioxide
Explanation:
All source relies on it Because if they dont have it then its not considered a source of anything else.Carbon dioxide refers to the source of carbon that can be found in each of the four spheres.
What is Carbon dioxide?This is an acidic colorless gas which are found in trace amounts in the ecosystem.
Plants use it to produce food and they act as sources of carbon thereby making it the most appropriate choice.
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How do landmasses impact the movement of air and water?
(A) They stop all movement of both air and water.
(B) They speed up the air and water and allow it to pass though.
(C) They change the direction and slow them down.
(D) They slow down the air but speed up the water.
Using your knowledge of the reflection, absorption, and transmission of mechanical waves, Why do you think the foam is used, and how do you think it functions?
You are designing an office building. In order to reduce noise from high-frequency sounds between offices above and below each other, would you choose carpet on concrete or wood floors? Explain your answer.
Answer:
concrete has more mass and it will block more noise than than the wood plus the wood is thiner the thicker the substance is the better u won't hear noise
Explanation:
Hello everybody! Can somebody help me please with these two questions? ( I don't know if it's really chemistry if not sorry! )
Answer:
1. C
2. B
Explanation:
1. Most living things need oxygen, water, and food to grow. ... Other living things eat plants or other animals for food. The cells of living things divide, allowing the living things to grow bigger and to change as they grow. The cells divide to form new cells that are different from the original cells.
2. The usual method of prokaryote cell division is termed binary fission. The prokaryotic chromosome is a single DNA molecule that first replicates, then attaches each copy to a different part of the cell membrane. When the cell begins to pull apart, the replicate and original chromosomes are separated.
Please please please help me!! Its urgent
Answer:
1. reproduction 2. fertilization 3. maturity
Please help me ASAP!!!!
Answer:
1. A
2. A
3. C
Explanation:
What are three types of variations within populations or species?
Which water feature is often associated with condensation?
Frozen lakes
The ocean
Clouds and fog
Water vapor rising from plants
Clouds and fog are water features often associated with condensation. The correct option is C.
The process by which water vapour, a gaseous form of water, changes into liquid water is called condensation.
When warm, moist air meets a cooler surface or when the air itself cools, it happens. As a result of this cooling, water vapour loses energy and condenses into tiny water droplets or ice crystals, which are what are seen as clouds or fog.
Even though the ocean and frozen lakes are both connected to water, condensation is not a direct result of either of these. As opposed to condensation, water vapour rising from plants is a result of transpiration.
Thus, the correct option is C.
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Your question seems incomplete, the probable complete question is:
Which water feature is often associated with condensation?
A. Frozen lakes
B. The ocean
C. Clouds and fog
D. Water vapor rising from plants
Where does the fuel people use to heat homes and power cars come from?
A. the remains of plants and animals that lived long ago
B. sedimentary rock that is thousands of years old
C. factories make it from rocks
D. inside fossils found deep in canyons
Answer: im pretty sure its A
Explanation:
hi person
when heat is removed from a substance, describe how are the molecules affected
Why is it not easy to replace a link in a food chain?
The decomposers will not decompose another type of organisms.
There are not enough plants to replace the previous organisms.
There are not enough animals to replace the previous organism.
There may be limited type of natural predators organisms may have.
Answer:
D-the last option
Explanation:
I think I'm correct.
help with thisss please :)
What is another name for fiber?
Answer: Thread, strand, tendril and filament are all synonyms of fiber.
Explanation: Fiber is a thread from a vegetable tissue, mineral substance, or textile is formed. It's also a dietary material that contains cellulose, lignin, and pectin.
Let me know if you have any questions.
~ Lily, from Brainly.
There are many other names for fiber. Some of them are Carbohydrate, Non-starch polysaccharide, Dietary fiber, Crude fiber, Insoluble fiber, Soluble fiber, Resistant starch, Prebiotic fiber, and Functional fiber.
Fiber is a type of carbohydrate that the body cannot digest. It is found in plant foods, such as fruits, vegetables, grains, and legumes. Fiber is important for gut health, heart health, and weight management.
The different names for fiber reflect its different properties and functions.
For example, carbohydrate is the general term for all sugars, starches, and fiber.Non-starch polysaccharide is a more specific term for fiber that is not made up of starch.Dietary fiber is the term used to refer to all the fiber that is found in food. Crude fiber is a measure of the total amount of fiber in food, including both soluble and insoluble fiber.Insoluble fiber is the type of fiber that does not dissolve in water. Soluble fiber is the type of fiber that dissolves in water.Resistant starch is a type of starch that is resistant to digestion.Prebiotic fiber is a type of fiber that feeds the beneficial bacteria in the gut.Functional fiber is a type of fiber that has been shown to have health benefits beyond its basic function as a food source.Therefore carbohydrate, non-starch polysaccharide, dietary fiber, crude fiber, insoluble fiber, soluble fiber, resistant starch, prebiotic fiber, and functional fiber are just a few of the names given to fibers.
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Has negative values
Group of answer choices
Celsius and Fahrenheit
Celsius and Kelvin
Fahrenheit and Kelvin
Answer:
Explanation:
Celsius and Fahrenheit
They have negative values but not Kelvin as its lowest is O Degree Kelvin.
Hope this helps!
BRAINLIEST ME PLS!!!
trigger warning/ su1cide
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how do you break up with someone over text because hes saying he’ll k1ll himself if you dont do what he wants you to do?
Answer:
tell his family about how he's manipulative or make him realize that even if you guys are still together you don't have feelings anymore
Answer:
what is the thing he wants you to do? this is hard. do you think he is serious and he will actually do it? if not, it's not worth the pain of staying in a relationship.
Explanation:
What type of tide is Australia likely to be experiencing in the diagram on the RIGHT and why? In your own words explain what is happening?
Answer:
Spring tides are extremely high and extremely low. This is created when the sun and moon pull together.
Explanation:
From the diagram, the type of tide Australia is likely to be experiencing is: neap tides.
A tide can be defined as the rise and fall of water level in water bodies such as lakes and oceans, especially due to the gravitational force of attraction exerted by the Moon and Sun on planet Earth.
Generally, there are two (2) main types of a tide and these include:
High tide.Low tide.Additionally, the two (2) form of a tide are:
I. Spring tide: it occur s twice each month close to the the full and new
moons, especially when the Moon and Sun pull together.
II. Neap tide: it occurs two times in a month when the Moon is close to its first and last quarters, especially when the Moon and Sun pull at a right angle.
From the diagram, the type of tide Australia is likely to be experiencing is neap tides because it happened when the Moon is close to its first and last quarters and the Moon and Sun were pulling at a right angle.
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Frozen ice caps in the Arctic Ocean are composed of?
A water vapor
B salt water
C fresh water
D a mixture of salt and fresh water