Historic Inventions
by Rupert S. Holland (adapted excerpt)

Humphrey Davy invented the safety-lamp that helped protect miners from the perils of flammable fire-damp1.

Explosions of coal-gas were only too common in the mines of England, leading to detrimental effects on those who labored underground. The biggest mine-owners met to see whether some protection against such accidents could not be devised. After much discussion, they appointed a committee to call on Sir Humphrey Davy and asked him to investigate the possibilities for them.

He took up the question, experimented with fire-damp, and found that it was in reality light carburetted hydrogen. He visited many mines and took into careful consideration the conditions under which the men worked. For months he investigated and experimented, and in 1815, he constructed the safety-lamp. This was an oil lamp, which had a chimney or cage of wire gauze that kept the flame of the lamp from passing through and igniting the fire-damp outside. The cage allowed air to pass and light to escape. Even if the combustion of the fire-damp caused the wire gauze to become red hot, it was still efficient as a safety-lamp.

1. a combustible gas especially methane
6
Select the correct answer.
Which statement best describes the writer's purpose?
A.
to persuade
B.
to entertain
C.
to instruct
D.
to inform

Answers

Answer 1
The authors purpose is to : Inform.

The author is informing the reader on how Humphrey Davy came to invent the safety-lamp.

Related Questions

An irrepressible tremor gradually pervaded my frame; and, at length, there sat upon my very heart an incubus of utterly causeless alarm. Shaking this off with a gasp and a struggle, I uplifted myself upon the pillows, and, peering earnestly within the intense darkness of the chamber, hearkened – I know not why, except that an instinctive spirit prompted me – to certain low and indefinite sounds which came, through the pauses of the storm, at long intervals, I knew not whence. Overpowered by an intense sentiment of horror, unaccountable yet unendurable, I threw on my clothes with haste (for I felt that I should sleep no more during the night), and endeavored to arouse myself from the pitiable condition into which I had fallen, by pacing rapidly to and fro through the apartment. —“The Fall of the House of Usher,” Edgar Allan Poe Which detail in the passage changes the mood from unease to horror? “intense darkness” “a gasp” “an irrepressible tremor” “certain low and indefinite sounds”

Answers

Answer:

D: certain low and indefinite sounds

Explanation:

I just did the assignment on EDGE2020 and it's 200% correct!  

Also, heart and rate if you found this answer helpful!! :) (P.S It makes me feel good to know I helped someone today!!)  :)  

The given detail in the passage that shows the changes of the mood from unease to horror is that it has certain low and indefinite sounds. Hence, Option D is correct.

What is an indefinite sound?

The term indefinite sound can also be called an indefinite pitch. A pitch or a sound is something that a listener listens to and identifies or judges what the sound is all about. For a better and clear understanding of the pitch, it is very important that the statement is clearly pronounced. In the case of an indefinite sound or indefinite pitch, the listener founds it quite difficult or next to impossible to identify it.

Sounds or the pitches that are indefinite, there is the absenteeism of the harmonic spectra or a characteristic known as inharmonicity. There are some indefinite pitch instruments also available like a bass drum and snare. drum, cymbals, triangle, tambourine, and many more.

Thus, Option D is correct.

Learn more about indefinite sound from here:

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Write an essay on the sights, sounds, tastes and smells of the busiest food street in your area. (Words limit 100 – 120)

Answers

Answer:

Eating is an experience that socializes and integrates people with their senses. The smell of food can transport us to a good memory, and the taste of dessert can bring us comfort and happiness. Most people have a favorite food and a good story involving food.

The food streets emerged as a different leisure experience for people, through the variety of colors, smells and aromas present in various food stalls around the world. In my city, these food streets are always busy at night, and there are songs, young people, elderly people, families, smells of different tasty foods, you can find hamburgers, pizza, ice cream, Japanese food, pasta, and a true cultural diversity and Social. Food streets bring integration and joy to people.

Which option is an example of deductive reasoning?

Answers

Answer:

A. All applicants must pass a test. Claire is an applicant, so she must pass a test.

Explanation:

Deductive reasoning can be defined as a type of logical reasoning that typically involves drawing conclusions from one or more premises (factual statements) that are assumed to be true generally.

Basically, deductive reasoning starts with a general statement, idea or hypothesis (All applicants must pass a test; Claire is an applicant.) and reaches a specific logical conclusion (so she must pass a test.).

Hence, the option which is an example of deductive reasoning is; All applicants must pass a test. Claire is an applicant, so she must pass a test.

In conclusion, deductive reasoning is highly based on drawing an inference and reaching a logical conclusion from one or more premises. An inference is an act or process which typically involves a person deducing the meaning or message from something through induction.

Answer:

A. All applicants must pass a test. Claire is an applicant, so she must pass a test.

URGENT!!! How soon hath Time, the subtle thief of youth,

Stolen on his wing my three and twentieth year!

My hasting days fly on with full career,

But my late spring no bud or blossom showeth.

Perhaps my semblance might deceive the truth,

That I to manhood am arrived so near,

And inward ripeness doth much less appear,

That some more timely-happy spirits endueth.


Which occasion or circumstance leads the speaker to the thoughts in Sonnet VII by John Milton?



a birthday



a fight



a spring day



a new career

Answers

Answer:

A birthday.

Explanation:

He said time( the thief of youth) took his 23rd year. First and second life.

Answer: A Birthday

Explanation: gradpoint

Which of the following rhetorical devices is unique to speaking?
O A. Using humor to make the topic more interesting
O B. Pausing before speaking to make the point stronger
O C. Appealing to the audience's emotions
O D: Appealing to the audience's sense of logic

Answers

Answer: A. Using humor to make the topic more interesting.

Explanation:

Humor is unique to speaking because when used elsewhere it might be open to interpretation.

When used in speaking however, it can be used to make the topic more interesting because the listener can infer the humor from the tone of the person speaking so that there is little chance of the speech being misconstrued.

Which detail would be most important to include in a summary of this text Michael Jordan

Answers

Answer:

Probably that he's won 6 rings and depending on who you ask may be the GOAT

Explanation:

. David: “It’s getting dark outside. ______ the headlights?”

Answers

Not sure where this is from but...
Can you turn on the headlights?
if it’s about the questioning word….then probably should be “ where are “

The statement: "I am as sick as a dog", is an example of an idiom.

True
False

Answers

Answer:

false

Explanation:

I think it is actually a simile because it compares two things using "as"

Answer:

False

Explanation:

It's a simile because it uses "as"

i need help asap!

which transition word is not correctly used in the passage

Answers

Answer:

moreover

Explanation:

Answer: the answer is moreover

Which phrases in the passage are adjectival phrases check all that apply

Answers

Where is the picture?

some people never remeber________attending the meeting conjunction ​

Answers

Answer:

about

Explanation:

Change the following ACTIVE sentence into PASSIVE VOICE.

The lawyer is preparing some important documents for the trial.

Answers

Answer:

No entiendo la pregunta

Some important documents are being prepared by the lawyer for the trail.

What is the central idea of "The Big Bad Wolf"

Answers

Answer:

Don't get too greedy

Explanation:

what does the word "dis" mean?

Answers

dis like “this”? or is it a math term....

Answer:

The word "dis" just means "this" changing the "th" to "d" :D

To renounce liberty is to renounce being a man, to surrender the rights of humanity and even its duties. For him who renounces everything no indemnity is possible. Such a renunciation is incompatible with man's nature; to remove all liberty from his will is to remove all morality from his acts. Finally, it is an empty and contradictory convention that sets up, on the one side, absolute authority, and, on the other, unlimited obedience.

–The Social Contract,
Jean-Jacques Rousseau


What is one major topic of this excerpt from the document?

the value of nature
the importance of equality
the freedom of individuals
the need for sacrifice

Answers

Answer:

One major topic of the excerpt is:

C. the freedom of individuals.

Explanation:

Jean Jacques Rousseau was a philosopher and political theorist born in Geneva in 1712. His work "The Social Contract" was first published in 1762.

As we can see in the excerpt, one major team is the freedom of individuals. Rousseau explains that freedom is a premise of humanity, and that no individual should give his freedom away completely. However, in "The Social Contract", he does defend the idea that part of one's freedom should be surrendered for the welfare of the community. That is the social contract we establish with our government or the police, for example. I give away part of my freedom when I give someone else (the police) the right to arrest me. Yet, I do it so that myself and others may be protected when or if necessary.

Answer:

C on Edge

Explanation:

Proof

What are the limitations to freedom of expression

Answers

Answer:

Freedom of speech and expression, therefore, may not be recognized as being absolute, and common limitations or boundaries to freedom of speech relate to libel, slander, obscenity, po___phy, sedition, incitement, fighting words, classified information, copyright violation, trade secrets, food labeling, etc.

Explanation:

bvgftyguhgvc fghjgfdsatyloAZSHJKL


J

Answers

hellooooooo:)))))))))

Rewrite the sentences using must, mustn't, should or shouldn't.
1 cars are obliged to stop when the traffic lights are red​

Answers

Answer: 1 cars must stop when the trafffic lights are red and mustn't go when it is green

Explanation:

Answer:

cars must stop when the traffic lights are red

cars mustn't proceed when the traffic lights are red

cars should stop when the traffic lights are red

cars shouldn't proceed when the traffic lights are red

Did you just say, “Her name is Marcia”

Where should the question mark be placed?


Did you just say, “Her name is Marcia?”


Did you just say, “Her name is Marcia”?

Answers

Did you just say, “Her name is Marcia"?

Answer:

The question mark should be placed as - Did you just say, “Her name is Marcia”?

Which statement is the most clear and interesting?
a.
My ancestor was a carpenter many years ago.
b.
My ancestor worked on the White House.
c.
My ancestor was a carpenter.
d.
My ancestor was the chief carpenter during the construction of the White House.


Please select the best answer from the choices provided

Answers

Answer:

I think the answer is D - My ancestor was a chief carpenter during the Construction of the white house

LAST DAY OF SCHOOL :D

Answers

Answer:

OMG YAY SAME

Explanation:

PLZ HELP!!!!! WILL MARK BRAINLYEST!!!!!! Name and describe the three (upper, middle or lower (amount of money)) classes found in Central America. keep simple

Answers

Answer:

upper rich middel inbetween lower poor

Explanation:

Read this excerpt from "A Modest Proposal":
I have already computed the charge of nursing a beggar's
child in which list I reckon all cottagers, labourers, and
four-fifths of the farmers) to be about two shillings per
annum, rags included...
What is Swift making a satirical statement about?
A. Society's attempt to address poverty
B. Society's denial of poverty
C. Society's indifference to poverty
D. Society's embarrassment about poverty

Answers

Society indifference to poverty

Swift is satirizing society's disregard towards poverty. Therefore, option C is correct.

Jonathan Swift criticizes the government's indifference for the needs of the poor and offers a satirical and implausible remedy that entails using and digesting newborns to restore balance and order.

The "Modest Proposal" by Jonathan Swift is a satirical and periodic work that fits into a particular literary subgenre. The title itself is a parody on the state of society at the time, and it also critiques the kings, the court, the constitution, the liberal political parties, and the conservatives while contemplating the social question of the country.

Swift employs sarcasm, sadness, poverty, infant cannibalism, and the artistic device of euphemism in this work to demonstrate to the reader the subject of the suffering of the human being at that time.

Learn more about Swift's satire here:

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*LANGUAGE
Q. What does the prefix 'dis' do to the word appeared in this sentence?
The cat disappeared before her very eyes.

a. It tells you that the cat appeared bigger than before. b. It tells you that the cat vanished. c. It tells you that the act appeared to be further away.

Question 15

Q. What does the prefix 'dis' do to the word appeared in this sentence?
The cat disappeared before her very eyes.

a. It tells you that the cat appeared bigger than before. b. It tells you that the cat vanished. c.It tells you that the act appeared to be further away.


Section B:
Write 10 idioms you know, the meaning and make a sentence with it
Best of luck​

Answers

First one this one did very eyes that means that it was gone so it’s like

Answer:

The answer is option b. It tells you that the cat vanished

Section - B

1. It's a piece of cake - it's very easy

2. Pull someone's leg - to joke with someone

3. To go bananas - to go crazy

4. Break a leg - good luck

5. Speak of the devil - the person we were just talking about just showed up

6. Under the weather - sick

7. To kick the bucked - to die

8. It's raining cats and dogs - it's raining hard

9. To spill the beans - to tell a secret

10. To eat like a horse - to eat a lot

Hope it helps:)

Elegir la forma correcta
1. Paul bought two ________ shirts (reds/red)
2. This film is _________ (short/green)
3. We met a _________ student (young Spanish/ Spanish young)
4. She wore a French dress cotton
She wore a cotton French dress
She wore a French cotton dress
5. This suit __________ (looks beautiful/ beautiful looks)
6. The day was beautiful __________ (and cold/cold)

Answers

Answer:

Explanation:

1. red

2. short

3. young Spanish

4. French Cotton dress

5. Looks beautiful

6. And cold

Hope this helps

Red,short,young Spanish,she wore a cotton French dress,looks beautiful.and cold.

Collective noun for drawer​

Answers

Answer:

Chest

Explanation:

Answer: The collective word which is used to denote a set of drawers is "Chest". It is often represented as the "Chest of Drawers" whenever we need to indicate a group of drawers.

If a borrower with poor credit needs a loan that is easy to obtain and provides
cash quickly, he or she would be likely to choose which type of loan?

Answers

Answer: Secured loan

Explanation:

A person with poor credit is not going to be easily trusted by lending agencies and if they are, they would be charged huge interest rates to cater for the risk associated with borrowing to a person with a low credit score.

One of the best loans to get for such a person is a secured loan. Secured loans use an asset such as physical assets like houses and cars as well as financial assets such as stocks and bonds.

The creditor can then take the asset if the person defaults. Secured loans are easier to get for people with poor credit because the asset covers them.

Read the passage.

The host greeted us and asked us what our seating preference was. We looked around the crowded café, and briefly debated our options before deciding that the chill outside was a bit much. We declined the alfresco option and chose a table by the kitchen instead.

Which clues from the text are most helpful for determining the meaning of alfresco? Select two options.

Answers

Answer: "...chill outside was a bit much."

Explanation:

They decided that the outside was a bit much, and promptly declined the alfresco option, implying that alfresco means outside.

What would u rather

1. Lipstick/ lip gloss
1. Pink eye shadow/ Black eye shadow
3. Short Dress/ Long Dress
4. Long hair/ Short Hair
5. Nail Polish/ Top Coat

Choose your wish and in next question i will post your Score

Answers

Answer:

lip gloss

pink

short

long

top coat

The football team The Raiders were having an incredible season so the whole town attended the games

How many commas

Answers

Answer:

2

Explanation:

1 goes before the raiders

1 goes before so

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