when was the first atom discovered?

Answers

Answer 1

Answer:

Explanation:

450. BC. u in chem ? hope u pass

Answer 2
450 B.
Democritus discovered it

Related Questions

What is the distance between the points (-7,3) and (4,-5) on the
coordinate plane?
O A. V13
O B. √57
O C. 7125
O D. 1185

Answers

The answer is B because

The distance between these given points on a coordinate plane is equal to: B. √57

Given the following points:

Points on the x-axis = (-7, 4).Points on the y-axis = (3, -5).

How to calculate the distance on coordinates?

Mathematically, the distance between points that are on a coordinate plane is calculated by using this formula:

Distance = √[(x₂ - x₁)² - (y₂ - y₁)²]

Substituting the given points into the formula, we have;

Distance = √[(4 - (-7))² - (3 - (-5))²]

Distance = √[(4 + 7)² - (3 + 5)²]

Distance = √[11² - 8²]

Distance = √[121 - 64]

Distance = √57

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which of the following best explains how environmental stressors, such as wildfires, can affect biodiversity in an ecosystem?

Answers

Answer:

Ecosystems with more species diversity are more likely to recover after a disturbance than ecosystems with low species diversity.

Explanation: Smaller populations are less likely to go extinct than larger populations, so the species diversity will remain constant.

What does basic beliefs( Buddhism) meditation mean?

Answers

Answer:

Buddhism Beliefs

They instead focus on achieving enlightenment—a state of inner peace and wisdom. When followers reach this spiritual echelon, they're said to have experienced nirvana. ... The word Buddha means “enlightened.” The path to enlightenment is attained by utilizing morality, meditation and wisdom.

Explanation:

-google

A forest has a NPP of 2.8 kgC/m2/year and the rate of cellular respiration is 4.8 kgC/m2/year. What is the GPP?

Answers

The net primary productivity of an ecosystem is 1 kgC/ m2/year, and the energy needed by the producers for their own respiration is 1.5 kgC/m2/year.

“Gettysburg Address”
by Abraham Lincoln

Which of the following basic sentence types appear in the passage?

I. interrogative
II. imperative
III. declarative
A.
II only
B.
III only
C.
I and III
D.
II and III
E.
I, II, and III

Answers

Answer:

D.  II and III

Explanation:

Interrogative phrases are those that present a type of questioning, a type of question. In “Gettysburg Address,” Lincoln makes no question and for that reason, we can say that there are no interrogative phrases in the speech.

Almost every discourse contains declarative sentences that are phrases where the author finds a fact. Lincoln uses this type of phrase right at the beginning of the discreet, when he states that "87 years ago, our parents gave birth, on this continent, to a new Nation, conceived in Liberty and devoted to the principle that all men are born equal."

Lincoln also uses imperative phrases that are phrases used to express a request, an order or an instruction. It is possible to see these phrases at the very end of the speech when Lincoln says "It is up to us, the living, to dedicate ourselves today to the work unfinished up to this point so remarkably advanced by those who fought here."

e) 375 math problem​

Answers

Answer:

não há nada aqui!!!!!

Explanation:

What is the question

URGENT!! Please Help ASAP!! 48 Points!! Assignment due in 15 minutes!!
Reflect on the questions below.

1.) Why do some people resist help from others?
2.) Is it useful to work separately at some point in time during pair programming?
3.) How is pair programming beneficial?
4.) In pair programming, how can we better work together?

Answers

Answer:

1. People have a hard to learn from others.

2. Yes, it is very helpful because one can code while the other navigate

3. Getting help can increse the chance of not missing something important

4. Communicate with each other

Which fraction is less than the fraction represented by the model?

A circle divided into 8 equal parts. 5 parts are shaded.

Three-fourths
StartFraction 11 Over 16 EndFraction
StartFraction 13 Over 16 EndFraction
StartFraction 2 Over 4 EndFraction

Answers

Answer:

2/4

Explanation:

1/2 of the circle is less than what is shaded

Answer:

2/4

Explanation:

How would you explain self-esteem to someone?

Answers

It’s how you feel about yourself

Answer: Confidence?

Explanation:

Write a short speech that persuades students and parents to choose the bake-sale fundraiser instead of the car-wash fundraiser.

Remember to include a:

topic sentence that connects to the audience.
claim, reason, and evidence.
counterclaim and rebuttal.
call to action.
Write your speech in the space below:

Answers

Answer:

I think the bake sale would be better because, if one we're to do a car wash they may not know how to wash a car and selling baked goods is WAY easier than a car wash. A car wash can be bad depending on the weather and the bake sale. So I would chose the bake sale, it's easier, faster and much more.

Explanation:

want a short speech?

Answer:

Friends: What should we do to raise money? A bake sale will help us raise money for the local food bank because bake sales can attract people from outside the school community. The neighboring town was able to raise over $5,000 at their bake sale. Although the car wash is a good idea, people are more interested in buying homemade food. I strongly urge you to vote for the bake sale.

Explanation:

N2O5 reacts with water to produce nitric acid. If 1.93 moles of N2O5 react with excess water, how many moles of nitric acid can be produced?

Answers

2. Balanced equation is N2O5 + H2O -------> 2 HNO3 ........... 1 mole of N2O5 produces 2 moles of HNO3 .....therefore 1.93 moles of N2O5 will produce 1.93 x 2 = 3.86 moles of HNO3 or nitric acid .............

The balanced chemical equation showing the reaction between dinitrogen pentoxide (N₂O₅) with water H₂O can be computed as follows:

[tex]\mathbf{N_2O_5 + H_2O \to 2HNO_3}[/tex]

From the given information, the amount of water H₂O is present in excess, as such dinitrogen pentoxide (N₂O₅) is regarded to be the limiting reagent.

However,

if 1 mole of dinitrogen pentoxide (N₂O₅) result in 2 moles of HNO₃

1.93 moles of N₂O₅ will result in = (2 × 1.93) moles of HNO₃

= 3.86 moles of HNO₃

Therefore, we can conclude that the reaction between 1.93 moles of N₂O₅ with water will produce 3.86 moles of nitric acid HNO₃.

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Work Survival skills include

A. introducing new ideas, coordinating tasks, and managing groups
B. identifying problems, gathering information, and imagining alternatives
C. cooperating, providing support, and expressing feelings
D. being punctual, managing time, and enforcing policies

Answers

I believe your answer is A

HELP WITH THIS NEEDS TO BE TURNED IN IN LIKE 3 MINUTES!!!!!!!!!!!
What is the purpose of listing your long-term goals on paper?
Full sentences please.

Answers

gotcha :)

The purpose of listing my long term goals on paper is to have them on paper, to be able to refer back to them when I'm struggling. It's also helpful to be able to cross them out if I complete them, and mark my progress. It's best to keep me on track

hope this helps!

PLEASE HELP ASAP!!
I WILL GIVE BRAINLIEST!!!

The table shows the electron negativity values of various elements on the periodic table. Which pair of elements would form an ionic bond?

A) carbon (c) and oxygen (o)
B) strontium (Sr) and chlorine (Cl)
C) cesium (Cs) and geranium (Ge)
D) magnesium (Mg) and aluminum (Al)

Answers

Answer: B

Explanation: Strontium lies in alkaline group so the valency is +2 and has 2 electrons in its valence shell. ... Therefore, electrons are transferred from chlorine to strontium. So ionic bond is formed.

why do people call people 8 years old when that is not their age

Answers

be people are ignorant
Because people do not have enough words in their vocabulary to insult someone correctly, making them in fact the 8 year old.

Is this the country that our founding father Envisioned?

Answers

definitely not. Our country has become unconstitutional

Which of the following originated in China and spread via the Silk Roads?
law codes
algebra
papermaking
surgical techniques

Answers

Answer:

Papermaking

Explanation:

Paper was invented in China during the 3rd century B.C., and its use spread via the Silk Road, arriving first in Samarkand in around 700 A.D., before moving to Europe through the then-Islamic ports of Sicily and Spain

Papermaking. Paper-making technique which was invented by Cai Lun was delivered to the west through the Silk Road

What are the pros and cons of having high levels of phosphorus in soil from added fertilizers?

Answers

A pro is increased crop production and a con is injury to the seedlings which is caused when salts in fertilizer is more than the salts in the plant cells

I hope this helps:D

Information does not have to be cross-checked if it comes from a site you have used before. t or f

Answers

Answer:

False because new authors are always added and things can change on all sites. it's also just a good habit to create.

Explanation:

Answer:

false

Explanation:

edge 2020

Which of the following are true about language?

It is symbolic.
It can be written, spoken, or signed.
It is capable of an infinite set of meaningful utterances.
All of these
None of these

Answers

Answer:

"All of the above" would be the correct answer.

The truth about language is it is symbolic, and can be written, spoken, or signed, is capable of an infinite set of meaningful utterances. The correct option is 4, all of these.

What is language?

Language is a way of communication. Each and every person use language to communicate with each other. There are different languages present in different areas. Language cane is symbolic, and it is used as part of life.

Languages are written and spoken and in before times, there were signs for different words. For the deaf, there is sign language, which used gestures and expressions. For blinds, there is a braille language, which they use. These are in the form of dots.  

Therefore, the correct option is d, All of these. It is symbolic. It can be written, spoken, or signed. It is capable of an infinite set of meaningful utterances.

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list all the pairs of vertical angles in the diagram ​

Answers

Answer:

hi! can you pls add an image of the diagram, otherwise I cant help

similarities between the ecomienda and slavery in the Spanish colonies ​

Answers

encomienda system posed a requirement of a group of individuals to give back to another in work, kind or otherwise, in exchange for a good received. It was established that a person who received the legal right to be an encomendero, had at his disposal a village of Indians with his caciques to pay him tribute and to serve him. In return, the Indians received "protection", that is to say, the encomendero had to take care of the well-being of the natives in the spiritual and in the earthly thing, assuring its maintenance and its protection, as well as its Christian indoctrination (evangelization).
The figure of the cacique or main character of the towns was very important because he used to be the intermediary between the encomendero and the Indians. The population was supposed to pay the Crown so the caciques collected the valuable things from their population and gave them to the encomendero.
This system differs from slavery inasmuch as it is considered as a system of exchanges where both parties give something in exchange for receiving something, in slavery there is no guarantee of anything to people, and they are only subjected to doing things for the sake of force. However, the encomienda has resembled slavery or has derived in it, since there have been abuses where forced labor, mistreatment and other things to the indigenous people ended up being imposed. On the other hand, encomienda as well as slavery is a system imposed. Another similarity is that the natives had to serve the encomendero, his family or whom they wanted to serve, in a mandatory manner. Also, both in the system of entrustment as in slavery, the people subjected do not have liberties, in the system of encomiendas you do not have the freedom to choose not to pay the crown since it is established as a duty and obligation, as well as they lose their freedom by being under the orders of the encomendero. In slavery, people also can not choose and must follow orders. But it should be mentioned that in the encomienda Indians could be entrusted for a maximum of 2 years, could not establish a perpetuity as dictated by the crown, different from the people subjected to slavery that were considered a more "economic" labor, they were forced to perform tasks under someone's command for indefinite periods, that is, there was a perpetuity of slavery that lasted as long as the person submitting them wanted, since in slavery one person (the master) takes over another ( the slave).

Which of the following square roots is between 4 and 5?
A.

B.

C.

D.

Answers

24! if i’m not correct sorry but i got it right.

What was the song dynasty known for

Answers

Answer:

The period of rule under the Song dynasty was a time of great advancements and invention. Some of the most important inventions in the history of Ancient China were made during this time including moveable type, gunpowder, and the magnetic compass. The Song dynasty had the first standing navy in world history.

Help me out everybody! Do not cheat everybody! My teacher checks plagarism on Grammarly. Please do me a favor and put your mind to it. What is the reason to rising tides? Conduct a paragraph with 4 sentences.

Answers

Answer: The reason why ocean tides rise is very simple. The moon has a gravitational pull on the Earth. This pull brings the oceans to a tide. Basically, the moon causes the pull. This can happen up to 6 times per day, in some rare cases, more.

Hope this helps you!

Find the measure of X, Y and Z in simplest form:

Answers

Answer/Explanation:

[tex] 12^2 = 16*x [/tex] (altitude to hypotenuse theorem)

Solve for x using this equation

[tex] 144 = 16x [/tex]

[tex] \frac{144}{16} = x [/tex] (division property of equality)

[tex] 9 = x [/tex]

[tex] x = 9 [/tex]

[tex] y^2 = 12^2 + x^2 [/tex] (pythagorean theorem)

[tex] y^2 = 12^2 + 9^2 [/tex] (substitution)

[tex] y^2 = 144 + 81 [/tex]

[tex] y^2 = 225 [/tex]

[tex] \sqrt{y^2} = \sqrt{225} [/tex]

[tex] y = 15 [/tex]

[tex] z^2 = (x + 16)^2 - y^2 [/tex] (pythagorean theorem)

[tex] z^2 = (9 + 16)^2 + 15^2 [/tex] (substitution)

[tex] z^2 = 25^2 + 15^2 [/tex]

[tex] z^2 = 625 + 225 [/tex]

[tex] z^2 = 850 [/tex]

[tex] \sqrt{z^2} = \sqrt{850} [/tex]

[tex] z = \sqrt{25*34} [/tex]

[tex] z = 5\sqrt{34} [/tex]

What zodiac sign are you?
I am pisces. ♓

Answers

Answer:

Sagittarius

Explanation:

Using the phosphorus data from the table, calculate the percentage of each phosphorus source that enters the Mississippi from the city of St. Paul.

Answers

Answer/Explanation:

% of each Nitrogen source = amount of Nitrogen from each source/total amount if Nitrogen × 100

% of Nitrogen from atmospheric deposition:

[tex] \frac{1,300}{7,400}*100 = \frac{130,000}{7,400} = 17.57 [/tex]

Approximately 18%

% of Nitrogen from household pet waste:

[tex] \frac{2,100}{7,400}*100 = \frac{210,000}{7,400} = 28.38 [/tex]

Approximately 28%

% of Nitrogen from residential fertilizer:

[tex] \frac{3,800}{7,400}*100 = \frac{380,000}{7,400} = 51.35 [/tex]

Approximately 51%

% of Nitrogen from weathering:

0%

% of Nitrogen from county compost:

[tex] \frac{200}{7,400}*100 = \frac{20,000}{7,400} = 2.70 [/tex]

Approximately 3%

What are some consequences of globalization?

Answers

Well, global economic growth and industrial productivity are both the driving force and the major consequences of globalization. They also have big environmental consequences as they contribute to the depletion of natural resources, deforestation and the destruction of ecosystems and loss of biodiversity.

Answer:

Globalization sure does come with a lot of consequences. Some of them are:

(1) Globalization restricts the growth of local industries (especially in the case of textiles & automobiles) as the imported goods are cheaper than the local goods.

(2) It causes poor work conditions for the workers as they have to work for longer periods of time with less wages.

(3) Globalization also affects the economy & the countries that export goods earn more or have MNCs in other places than countries that import goods.

Hope it helps ⚜

The complete set of cases from which samples may be drawn is called a(n) A.control condition. B.independent variable. C.case study. D.population. E.survey.

Answers

Answer:

D. Population

Explanation:

Hope this helps lol.

The complete set of cases from which samples may be drawn is called as population. Thus option D is correct.

what is population ?

A population can be defined as complete group of individuals which  comprises a nation or a group of individuals having common characteristic features.

It is a pool of  individuals from which the statistical sample is drawn for a study purpose, so the election of individuals grouped by a common feature which can be called as population.

For, a statistical analysis of a sample of a population must report a standard deviation, or standard error,  so that the results from the entire population can be determined properly.

Thus option D is correct.

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Other Questions
I need this answer 5x + 10 = 6x 20 Ernie went to see some friends in San Antonio 240 miles away. It took him 3 hours to get there. What was his average speed? adapted from Agnes Grey by Anne Bront My footsteps were the first to press the firm, unbroken sands. Nothing before had trampled them since last night's flowing tide had obliterated the deepest marks of yesterday. The sand was fair and even, except where the subsiding water had left behind it the traces of dimpled pools and little running streams. Refreshed, delighted, invigorated, I walked along, forgetting all my cares, feeling as if I had wings to my feet. I could go at least forty miles without fatigue and experience a sense of exhilaration to which I had been an entire stranger since the days of early youth. About half-past six, however, the grooms began to come down to air their masters' horses. First one, and then another, till there were some dozen horses and five or six riders. But, that did not trouble me, for they would not come as far as the low rocks which I was now approaching. When I had reached these, and walked over the moist, slippery sea-weed (at the risk of slipping into one of the numerous pools of clear, salt water that lay between them), to a little mossy mound with the sea splashing round it, I looked back again to see who next was stirring. Still, there were only the early grooms with their horses, and one gentleman with a little dark speck of a dog running before him, and one water-cart coming out of the town to get water for the baths. 5 Select the correct answer. Where does the story take place? A. on the beach B. near a swimming pool C. in a stable D. on a village street PLZ HELPA student needs to jot down some quick notes of the story elements in a book he is reading in English class. Which note-taking methods would be best for taking such notes? Check all that apply. mappingthe Cornell methoda detailed outlineSQRWcharting Calculate 3 over 4 5 1 fifth For a substance to change from a gas to a liquid, what must happen to its particles? Meet my horse! ask questions about him too! 8.96 rounded to the nearest hundredth Solve for x3x/2 - 2 > 7 What multiplies to be a 20 and adds to be a -21? Which of the following best reflects the view Montaigne was conveying in his essay, Of Cannibals?European society was pure and its practices should not be questioned.Imitating primitive societal practices would jeopardize the progress of Western society.Primitive societies are fortunate to live simply, but they miss out on Western opportunities to learn and advance.Primitive societies are the purest at their roots because they allow their lifestyle to be shaped by nature. who was Sykes and Picot and why they were interested in the Middle East. In a mixture of bromine-79 and bromine-81 isotopes. An atom of bromine-79 contains? PLEASE HELP ME!!! THIS IS URGENT!!! DUE IN 5 MINUTES!!!LOOK AT THE IMAGE There are several ways to model a compound. One type of model is shown. A central C attached to 3 C's by 1 line each, each of the 3 C's being attached to 3 H's by a 1 line each. The central C is also attached by 1 line to a C, which is attached to 2 H's and a C by a single line each. The C is attached by 2 lines to an O ad by 1 line to another O. The O with 1 line is attached by 1 line to an H. What is the chemical formula for the molecule modeled? CHO C4H11O2 C6H12O2 C6H9O we could barely see the narrow path, it was raining heavily use soo that Who can help me with my math homework I can ask the questions on here the way they are set up? Why do we say that there have been 45 presidents but only 44 people have been president? Marshall buys a sack of peaches for $5.98. The peaches weigh2.77 pounds. About what price per pound did Marshall pay? Estimate using compatible numbers. 30 = [(10 - 8) + (17-14)]