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

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

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.

Learn more about chemical equation here:

https://brainly.com/question/12271256?referrer=searchResults

please help me please​

Answers

Answer:

4.A

5.A

6.B

7.A

8.A

Enjoy ❣️

team Edward or team Jacob

I'm team Jacob so don't even

Answers

Answer:

Edward

Explanation:

because vampires are cooler than furries :/

Answer: Team Jacob

Explanation: The relationship between Bella and Edward is 100 percent toxic, unhealthy and abusive.Edward is overprotective and tries to restrict Bella's friend group, especially when she starts hanging out with Jacob Black and the other werewolves.Jacob is hotter than Edward. Jacob even says so. Bella's freezing in a tent and only Jacob's body temperature can keep her warm. When Patterson  heard Lautner say, "I'm hotter than you,".

How can teens model good physical fitness to other teens in their neighborhood?
O by reading books at the library
O by baking cookies for the elderly
O by riding their bikes to school
O by growing vegetables in their own gardens

Answers

Answer:

c

Explanation:

it's the only option that shows physical activity

The way in which teens can model good physical fitness to other teens in their neighborhood is: C. by riding their bikes to school.

What is physical fitness?

Physical fitness can be defined as a measure of both the physical and mental soundness (wellness) or ability of an individual to engage in physical exercises, sports, work and other day-to-day activities.

In this context, an example of a way in which teens can model good physical fitness to other teens in their neighborhood is by riding their bikes to school.

Read more on physical fitness here: brainly.com/question/1809216

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“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."

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

FRQ Practice
Beth is walking to math class. She is feeling stressed about her big test. As she walks to class, she talks
with her friend Ted. When Beth arrives at class, the room is warm and she drinks some water to cool
off.
For each term listed below, identify its function as it relates to the above situation.
• Motor Neurons
• Sympathetic Nervous System
• Adrenal glands
Broca's Area
• Hypothalamus
-Cerebellum

Answers

Answer:  Adrenal glands

Explanation:

Adrenal glands are located above each human kidneys these glands secrete hormone adrenaline during stress conditions or during emergency.

Here, Beth is stressed about her test so she finds her classroom warm and an urge for thirst has also arise due to her being this is a kind of stress response generated by the adrenal glands and their secretions in the form of adrenaline hormone.  

PLEASE HELP IM TIMED!!!What is the average reading rate for middle school students?
O 31 to 67 WPM
O 65 to 95 WPM
O 127 to 151 WPM
O 175 to 200 WPM

Answers

Answer:

C 127 WPM

Explanation:

Answer:

127 ez

Explanation:

What part of the brain allows Us to experience cocktail part effect

Answers

the auditory regions of the brain

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.

Write a short essay citing the significance of cell signals and their effects on functions in the cytoplasm and functions within the nucleus?

Answers

Answer:

a short essay citing the significance of cell signals and their effects on functions in the cytoplasm and functions within the nucleus?

The mechanism of cell signaling promotes the relocalization of effector molecules from the region of the cytoplasm to the nucleus.

What is the significance of cell signaling?

The significance of cell signaling is determined by the fact that it is the basic methodology through which specific information and messages are transferred from the surface of the cell to the cytoplasm and ultimately to the nucleus. This leads to alterations in gene expression.

The mechanism of cell signaling initiates when a ligand is bind to its receptor present on the membrane of the cell. A downstream signaling cascade runs after the successful binding of the ligand to its receptor. This binding is more specific.

It firstly affected the cytoplasm and allows it to change its functions according to the need of the cell during the process, which ultimately leads to the alteration in the morphology and functionality of the nucleus which is primarily responsible for transferring genetic information from one generation to the next.

To learn more about Cell signaling, refer to the link:

https://brainly.com/question/14470454

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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

from “A Talk to Teachers”
by James Baldwin
The word “myth” is used for all of the following purposes EXCEPT to
A.
emphasize the false logic to which many white Americans subscribe regarding African Americans
B.
serve as the foundation for his supporting evidence in this section
C.
establish ethos and show that Baldwin is an unbiased commentator
D.
suggest that white Americans have a childlike desire to believe false stories over harsh realities
E.
suggest that American history is not educational because most accounts have been mythologized

Answers

Answer:

C

Explanation:

Trust in me brother

e) 375 math problem​

Answers

Answer:

não há nada aqui!!!!!

Explanation:

What is the question

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.

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]

Expain why acid forming in the ocean would affect the ecosystem.

Answers

Answer:

The amount of carbonate, a main building block in sea water, is reduced by ocean acidification. This makes it harder for marine organisms to shape their shells and skeletons, such as coral and some plankton, and existing shells will begin to dissolve.

Answer:

The ecosystem would start to become empty

Explanation:

Ocean acidification reduces the amount of carbonate, a key building block in seawater. This makes it more difficult for marine organisms, such as coral and some plankton, to form their shells and skeletons, and existing shells may begin to dissolve. The impacts of ocean acidification are not uniform across all species. Hopefully the explanation and answer helps!

NEED HELP ASAPPP
If a region’s physiological density is much larger than its arithmetic density, then:
a) the population is unable to sustain farming efforts.
b) the land is located close to an urban area.
c) the population has minimal access to food.
d) the land has minimal capacity to feed the population.
e) the population lives primarily in urban areas.

Answers

D , hope this helps :)

Any tips to helping to show my little brother with autism how to write ?

Answers

Answer:

Tell him it is easy to do it, little boy XD

Explanation:

i think you should show him a video how to write

Explanation:

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

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

Explain how schedules of reinforcement can be used to strengthen johns plan

Answers

Answer:

should use a fixed-interval schedule to enhance reading and strengthen his argument (the kids will know exactly when they get rewards)

Explanation:

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.

Where do most undocumented immigrants in the U.S. come from?
PLZ HELP THIS IS FOR MY AP HUMAN GEOGRAPHY CLASS!! ​I WILL BRANLIST IF CORRECT

Answers

Answer:Mexico

Explanation:

It is adjacent to the US and offers financial and political freedom

What would you do if a Karen threatened take your skateboard and call the cops on you
Give me a meme answer or somthing halarious

Answers

Answer:

THROW THE SKATEBOARD AT HER AND RUNNNN, also if she records you and your a minor you can get her arrested cause recording a minor without their consent is illegal

Explanation:

:D

She would say let me speak to the manager first. I would say, I am the manager

Maria notices that her paragraphs are to close to one another.

Answers

Answer:

Maria can change the spacing and indent. If the paragraphs are too close space and indent.

Explanation:

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).

How did early Islam affect the lives of women?

Answers

Women were allowed to pray with men, take part in commercial interactions, and played a role in education. One of Muhammad's wives, Aisha, played a significant role in medicine, history and rhetoric. Women, however, did not hold religious titles, but some held political power with their husbands or on their own.

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