This is for science


Identifying an Unknown Substance (continued)

Which of these substances do you think is the unknown substance the criminal used to make a
hole in the glass? (highlight one)
A hydrobromic acid

B hydrofluoric acid

C iodine monochloride

D perchloric acid

Explain your answer.

Answer:

acting ability i think hope it helps

Answer:

B The cells of the body use the oxygen to release the energy from the food.

Explanation:

Good Luck!

Answer:

B. is correct

Explanation:

Answer:

The rates at which reactants are consumed and products are formed during chemical reactions vary greatly. Five factors typically affecting the rates of chemical reactions will be explored in this section: the chemical nature of the reacting substances, the state of subdivision (one large lump versus many small particles) of the reactants, the temperature of the reactants, the concentration of the reactants, and the presence of a catalyst.

Explanation:

Answer:

D-the last option

Explanation:

I think I'm correct.

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

Answer:

1.They generate power only from the kinetic energy of moving water (current).

2.relating to the motions of fluids or the forces which produce or affect such motions — compare hydrostatic.

3. It uses water motion to generate a high-pressure liquid rather than electricity.

4. tidal currents, ocean currents or river currents into electrical power.

5.When flowing water is captured and turned into electricity, it is called hydroelectric power or hydropower. There are several types of hydroelectric facilities; they are all powered by the kinetic energy of flowing water as it moves downstream.

Explanation:

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!

Answer:

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

Explanation:

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.

Answer

im thinking its D or E

Explanation:

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:



Answer:

A

Explanation:

Answer: The answer would be A!

Explanation: Hope I helped you! ^^

Answer:

Bet

Explanation:

In a conductor, electric current can flow freely, in an insulator it cannot. "Conductor" implies that the outer electrons of the atoms are loosely bound and free to move through the material. ... Most atoms hold on to their electrons tightly and are insulators.

Answer:

Explanation: the friction between the ground and the car will most definitely not change unless you rather balance the force out or force to use brakes

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.

Read more: https://brainly.com/question/21694593

Answer:

N

Y

N

N

N

Y

Explanation:

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

Good Luck!