If a scientist wants to make molecules move slower, what should they do? A. decrease their kinetic energy B. Transfer energy out of them C. Put them in a freezer D. All of the above

Answer:

B. is correct

Explanation:

Answer:

acting ability i think hope it helps

Answer:

She has such a sad life....but I work part time in a bookstore-

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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:

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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Answer:Pores,collar,spicules

It's A: an animal that transfers pollen from flower to flower.

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Answer:

A

Explanation:

continental drift

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:

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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:



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Answer:

um ewww

Explanation:

10. i think is c

11.  i think i d

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Answer:

It is carbon dioxide

Explanation:

Carbon dioxide refers to the source of carbon that can be found in each of the four spheres.

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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Answer:

They need to have a full outer shell to be stable so they bond with each other and share electrons to become stable forming a compound.

Explanation:

Hope this helps!

Answer

im thinking its D or E

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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

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