.A cop car's siren has a frequency of 700 Hz, if you are standing on the sidewalk as the cop car approaches you at a speed of 15 m/sec, what frequency would you hear? 20 °C

Answers

Answer 1

Answer:

732 Hz

Explanation:

Given the following :

Frequency (fs) of siren = 700Hz

Speed (vs) of approaching car = - 15m/sec

Velocity of listener(vl) = 0

Velocity of sound wave = 340m/s

From doppler effect, use the formula :

fl = [(v + vl) / (v + vs)] fs

Where fl is the frequency heard by the listener

fl = [(340 + 0) / (340 +(- 15) )] * 700

fl = [ 340 / 325] * 700

fl = 1.0461538 * 700

fl = 732.30769

fl = 732 Hz ( to the nearest whole number)


Related Questions

Question 1 of 10
Which best describes the type of rhymes used in "Lissadell"?
A. Slant internal rhymes
B. Perfect end rhymes
c. Perfect internal rhymes
D. Slant end rhymes

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Answer:

I belive its B

How does Oona describe Ivan?

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Explain more on the question

Which best states the central idea of this excerpt? It is always necessary to work with a partner when dealing with unidentified substances. Extreme precautions must be taken when dealing with potentially hazardous materials. Scientists are well known for being overly cautious and for taking unnecessary safety measures. It is standard procedure to wear both space suits and hearing protectors in laboratories.

Answers

This question is missing the excerpt. I've found the complete question online. It is the following:

Read the excerpt from The Hot Zone.

There she met Lieutenant Colonel Trotter, a stocky, dark-haired man whom Nancy had worked with for many years. They put on their inner gloves and taped their cuffs. Nancy put a pair of hearing protectors over her ears. She had started wearing them a while back, when people had begun to suspect that the roar of air in your suit might be loud enough to damage your hearing. They hauled on their space suits and sealed the Ziploc zippers. They edged around each other as they fiddled with their suits. People wearing biohazard space suits tend to step around one another like two wrestlers at the beginning of a match, watching the other person's every move, especially watching the hands to make sure they don't hold a sharp object. This cringing becomes instinctive.

Which best states the central idea of this excerpt?

A.It is always necessary to work with a partner when dealing with unidentified substances.

B.Extreme precautions must be taken when dealing with potentially hazardous materials.

C.Scientists are well known for being overly cautious and for taking unnecessary safety measures.

D. It is standard procedure to wear both space suits and hearing protectors in laboratories.

Answer:

The option that best states the central idea of this excerpt is:

B.Extreme precautions must be taken when dealing with potentially hazardous materials.

Explanation:

The excerpt reveals they are wearing biohazard suits, meaning they will be dealing with potentially hazardous materials. We know, not only from movies but also from real life disasters, that when people deal with hazardous materials, extreme precautions are taken to ensure everyone's safety. From the excerpt, we cannot assume it is always necessary to have a partner. It is unclear as to why they are working in pairs. The excerpt also does not criticize the safety measures, does not make it seem that scientists are overly cautious. Finally, the hearing protectors Nancy is wearing are a choice of hers. It is not a standard procedure to wear them. Taking all that into consideration, we can safely choose letter B as the correct choice.

The option that best states the central idea of this excerpt is: Extreme precautions must be taken when dealing with potentially hazardous materials.

In this passage from "The Hot Zone," we learn of the precautions that people wearing biohazard suits had to take.

They were to watch the hands of their partners, to be sure that they were not holding any sharp objects that could lead to harm.

Generally, the excerpt explains that people who handle potentially hazardous materials had to take some precautions.

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Define personification

Answers

giving a nonhuman thing human characteristics
Giving something that is non human human characteristics

1: "What kind of liberation movement shoots innocent civilians, children, that little girl"? (p. 14). Discuss the ethics of liberation movements. (Feel free the research the concept of liberation movements if you need.)

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You need to shoot the teachers  first then the kids its better to kill the adults then risk your life (:

I help Mrs. Snodgrass after school. She was my fourth grade teacher.

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Answer:

good job

Explanation:

helping someone is a good way to be a successful person

Answer: lol ok

Explanation: wat you askin my g

Choose the word that has the underlined part pronounced different from the others: A. Know B. Close C. Town D. Sofa

Answers

sofa

Explanation:

because according to the pronunciation apart from sofa ,the other ones have long pronunciation

Answer:

Town

Explanation:

The O sounds different in town compared to the others!

please mark as brainliest

1.where does short stories originated from? 2 when was this first used and developed?​

Answers

Answer:

A

Explanation:

Answer:

was developed in 19th  century father of short storu = gu de maupassant

Explanation:

passive form of she was helping them

Answers

Answer:

they were being hepled by her

god bless you.

They are helped by her
Hope this helps

'Describe one activity teenagers like you enjoy doing. Explain why they are important to you.'​

Answers

Soccer because i get to exercise and have fun

In the following sentence, what does the word disheveled mean? The bumpy bus ride left Robin’s hair disheveled.

Answers

Answer:Untidy

Explanation:

''Disheveled'' means making something untidy

Read the following two sentences. Their math teacher informed them that division problems would not be on the test. The class was happy to hear that these kinds of problems would be excluded. Use the context clues to find the definition for the word excluded as it is used in these sentences. kept out prevented shut out not allowed

Answers

Answer:

Kept out.

Explanation:

in the line before it mentions excluded, it states that the division problems will not be on the test. These words, "not be", are context clues to figure out what the word excluded means.

If someone states something won't be on the test, you can infer that the teacher will keep out those questions from the test, which is what excluded means.

Answer:

keptt ouuttt

Explanation:

A, an or the I like french.​

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Answer:

J'aime

Explanation:

Which phrases are examples of sensory imagery that make the details of the setting more vivid? Check all that apply.

Answers

Answer:

1, 3, and 4

Explanation:

on edge 2021! hope this helps!!~ (/^▽^)/

Crops withered, curled up, then died under the thirsty sun, a voice that seemed to rumble out of the earth itself and prodding each other and giggling, went back to the house. Thus, options A, D, and E are correct.

What is imagery?

Imaginary means that something is not real or a person is imagining something. This represents that the person or the individual is thinking about some event that is about to happen or will never happen.

A noise that appeared to growl from the earth itself, pushing each other along and grinning, returned to the dwelling while crops shriveled, coiled up, and ultimately died underneath the dry sun are illustrations of sensory images that bring the setting's specifics to life.

Therefore, option A, D, and E is the correct option.

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#SPJ6

The question is incomplete, the complete question is:

crops withered, curled up, then died under the thirsty sun

morning in July a hurricane came out of the east

snapping their roots and tearing them out of the earth

a voice that seemed to rumble out of the earth itself

prodding each other and giggling, went back to the house

Read the last sentence of the passage. "The most important issue going forward is how AI technology can best serve the humans who created it." How does this sentence engage the reader in the subject material? A. The author draws a conclusion that the reader is expected to accept. B. The author invites the reader to consider the possibilities of this technology. C. The author tells the reader that this technology will improve his or her life. D. The author uses humor to encourage the reader to accept the information.

Answers

Answer:

B. The author invites the reader to consider the possibilities of this technology.

Explanation:

The line above engages the reader in the subject matter in that:

"The author draws a conclusion that the reader is expected to accept." (Option A)

What is a Subject Matter?

Subject Matter refers to the central idea that an article evokes. Another word for the subject matter is the theme which speaks to the reason or purpose for which the article is written.

Here the subject matter is about AI technology and how best it can serve humans.

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change the negative and interrogative.
1. The train leaves in two hours.
2. Jatin plays cricket every evening. ​

Answers

Answer:

I hope this will help you :)

Explanation:

1. The train does not leave in two hours.

Does the train leave in two hours?

2. Jatin does not play cricket every evening.

Does Jatin play cricket every evening.

Write a story about a boy who experience something unexpected when he staying home alone. What happen and how it affected himself??? ​

Answers

There was a boy name Alan, he wanted to stay home and things started getting weird... he saw things flying off the walls and he died that night. Not before leaving his everlasting print on his parents house

Does Wapnick’s talk change your perspective on how people can have one or more true callings? If so, what are some of yours and how do you plan to use those callings in the future? How does it connect to the unit theme? (The theme of the two texts you will read is The Journey Beyond). Answer in 5 complete sentences.

Answers

Answer:

Yes, Wapnick's talk actually changed my perspective on how people can have one or more true callings. I have discovered some of my true callings which are ICT Expert, Farmer and Transport Manager. In the future, I will have a channel to educate people on life matters, create IT solutions for firms, build a poultry farm and start up an online booking service. I will adapt to the skills Wapnick revealed in her TED Talk: Idea synthesis, Rapid Learning and Adaptability.

This connects to the unit theme because it reveals that there is a career journey that awaits beyond the school walls filled with possibilities.

Explanation:

During the TED Talk of Emilie Wapnick, she explained how she became a multipotentialite and was into everything she had interest for.

Wapnick has been a songwriter/musician,filmmaker,web designer, writer, law student and entrepreneur.

What is one example of prose?

Answers

Prose is a form of written language that usually exhibits a natural flow of speech and grammatical structure—an exception is the narrative device stream of consciousness.

Some examples of prose are: textbooks, newspaper articles, novels, lectures, conversations, essays, short stories, a play, advertisement.

Self-reflection can improve your understanding of a subject and help you do better in school. Write about your experiences on a recent test for which you received a poor grade or a grade you wished were higher. Answer the following questions in your response. 1. What did I do well? (Be specific.) 2. What did I miss, and why? 3. What should I have done differently? (Offer at least one example.) 4. If I faced the same test again, would I do better now? Why?

Answers

Explanation:

Remember, Self-reflection involves an honest evaluation of oneself. Thus, consider this self-reflective example of a student who performed poorly mathematics.

1. What did I do well? (Be specific.); I attended all the maths classes.

2. What did I miss, and why?: I failed to study the course material well and didn't pay full attention in class, because I felt overconfident about passing the course.

3. What should I have done differently?: I needed to give the course material my full attention, and I would have asked my friends who knew the course material well for assistance.

4. If I faced the same test again, would I do better now? Why? : Yes, because I now know what I did wrong.

Self-evaluation simply has to do with evaluating oneself in order to know how one can improve.

Self-evaluation is an honest opinion that one gives to himself or herself. The thing that I did well despite the poor grade that I had was the fact that I attended all my Biology classes.

The thing that I missed was that I didn't study the materials very well and didn't read. The thing that should have been done differently was that I should have been better prepared and studied harder.

If I faced the same test again, I'll do better because I'll be more prepared.

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mr. kulkarni is the .........of our college. he is the man of .........​

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Answer:

Mr.kulkarni is the owner of our college.

Help me please~~ Mình xin cảm ơn trước nhé!

Answers

answer

1. border

2. staying

3. reach

4. season

5. takes

6. excursion

7. miss

8. view

9. bring

10. distance

11. book

12. home

I THINK FOR 6TH ONE IT COULD BE ALSO BE TRIP / EXCURSION .

hope it helps u :)

2. Due to what three reasons does the writer think we dare the nightmare ?

Answers

Fear, lack of courage and no preparation of mind are the reasons we dare the nightmare to influence our life.

We dare the nightmare due to our fear, lack of courage to face the fear and no preparedness to counter the fear. If we fear from the nightmares and allow them to influence our life then the fear will not go from inside our body but if we create a courage to face our fear, the fear vanished from our life and we will be free from that fear completely. Preparedness of our mind is the tool due to which we can counter the fear and decrease the influence of nightmares.

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Hi, you've asked an incomplete question. However, I assumed you are likely referring to the article "Why We Crave Horror Movies" by Stephen King.

First, we may wonder, what is exactly a nightmare? In simple words, it is a disturbing dream that makes one afraid often as a result of something frightening we saw prior to sleeping.

Interestingly, among the three reasons the writer, Stephen King states are:

"to show that we can, that we are not afraid...": In other words, the writer is saying we do this to prove that we are courageous enough not to be afraid of what is to come in the movie."to reestablish our feelings of essential normality""to have fun".

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Back in the 15th century in Nuremberg, lived a family with eighteen children. Eighteen!
Despite their seemingly hopeless financial condition, two of them had a dream. They both wanted to pursue their talent for art, but they knew very well that their father would not be able to send either of them to Nuremberg to study at the Academy.
After many long discussions the two boys, Albert and Albrecht, finally worked out a pact. They would toss a coin. The loser would go down into the nearby mines and with his earnings, support his brother while the winner would attend the Academy. And, when that brother who won the toss completed his studies, in four years, he would support the other brother at the Academy, either with sales of his art work or, if necessary, also by labouring in the mines.
They tossed a coin on a Sunday morning after church. Albrecht Durer won the toss and went off to the Academy. Albert went down into the dangerous mines and for the next four years financed his brother, whose works at the Academy were almost an immediate sensation. Albrecht’s etchings, his wood cuts and his oils were far better than most of his professors. And by the time he graduated, he was beginning to earn a considerable sum for his commissioned works.
When the young artist returned to his village, the Durer family held a festive dinner at their lawn to celebrate Albrecht’s triumphant homecoming. After a long and memorable meal, punctuated with music and laughter, Albrecht rose from his honoured position at the head of the table to drink a toast to his beloved brother for the years of sacrifice that had enabled him to fulfil his ambition. His closing words were, “And now, Albert, blessed brother of mine, now it is your turn. Now, you can go to Nuremberg to pursue your dream, and I’ll take care of you.”
All heads turned in eager expectation to the far end of the table where Albert sat, tears streaming down his pale face, shaking his lowered head from side to side while he sobbed and repeated, over and over, “No…..no…….no……no…….”
Finally, Albert rose and wiped the tears from his cheeks. He glanced down the long table at the face he loved, and then holding his hands close to his right cheek, he said softly, “No brother I cannot go to Nuremberg. It is too late for me. Look…. Look what 4 years in the mines have done to my hands! The bones in every finger have been smashed atleast once and lately I have been suffering from arthritis so badly in my right hand that \I cannot even hold a glass to return your toast, much less make delicate lines on parchment or canvas with a pen or a brush. No, brother …… for me it is too late”
To pay homage to Albert for all that he had sacrificed, Albrecht Durer painstakingly drew his brother’s abused hands with palms together and thin fingers stretched skywards. He called his powerful drawings simply ‘hands’, but more than 450 years later the entire world almost immediately opened their hearts to his great masterpiece and renamed his tribute of love, ‘The Praying hands’.
1. The Durers were
a) mine owners
b) land lords
c) very rich
d) poor
2. Albert and Albrecht dreamt of
a) pursuing art
b) studying at the university
c) becoming rich
d) getting on top
3. The brother who won the toss would
a) go to the Nuremberg Academy
b) work in the mines
c) stay at home to look after the family
d) become the artist.
4. They tossed the coin
a) on a Sunday morning after Church
b) on a Sunday morning before Church
c) on a Monday morning after Church
d) on Sunday mornings after Church
5. Albrecht's works at the Academy were
a) mediocre
b) highly appreciated
c) run of the mill
d) a cause of envy among his professors
6. The Durer family held a festive dinner ...
a) to celebrate Albert's sacrifice
b) to honour both their sons
c) to celebrate Albrecht's success
d) to celebrate the reunion
7. It was too late for Albert because
i) he lost interest in art
ii) he doubted his ability to match his brother's talent
iii) he had arthritis in his right hand
iv) he had delicate lines on his hand
8. Which word out of the following can best replace 'financed' in the text?
a) created
b) imagined
c) funded
d) aided
9. Which word out of the following can best replace 'parchment' in the text?
a) earth
b) paper
c) table
d) wall
10. The duration of the course at the Academy was...
a) two years
b) three years
c) four years
d) four years and internship



pls tell me the answer i will give u 100 points only for correct answers

Answers

Pura paper copy paste kiya padh ni pa rha itna easy

In Which case we wash our hand write in four point​

Answers

Explanation:

to stop germs from spreading to prevent from infectionbefore eating foodto be healthy

Answer:

Explanation:

The cases that we wash our hand write in four point​ are :

1.  After handling money.

2. After coughing, sneezing, or blowing your nose.

3. After coming into contact with sick people.

4. After touching animals.

1. A. focus B. open C. chore D. impose
2. A. generation B. advice C. typical D. elegant
3. A. manners B. conflicts C. objects D. viewpoints
4. A. decision B. impose C. arise D. organisation
5. A. restricted B. obliged C. respected D. beloved

Answers

Answer:

C chore

A generation

A manners

D organisation

A restricted

How does the passage from Genesis differ from Weldon's poem "The Creation"? A) The passage from Genesis is elaborative and detailed, while the passage from the poem simple and direct. B) The passage from Genesis focuses on the creation of the earth, while the passage from the poem describes the fall of humankind. C) The passage from the poem personifies God as a creator or artist, while the passage from Genesis describes the fall of mankind simply. D) The passage from the poem does not give insight into God's feelings or desires, while the passage from Genesis explains God's emotions and thought processes

Answers

Answer:

I belive it is a sry if i got it wrong

Explanation:

in the bible they and lots of detail to explain it because it had to make sure that it got everything in

Answer:

C) The passage from the poem personifies God as creator or artist, while the passage from Genesis describes the fall of mankind simply.

Explanation:

This is because the poem goes on about seeing through God's eyes and smiling creating light and making the sun in his hand while Genesis is short and sweet to the point and very simply put.

Along with what I have above I got it correct on USA test prep as well.

Plus here's a definition.

Personification/Personifies: The attribution of a personal nature or human characteristics to something nonhuman, or the representation of an abstract quality in human form.

How does distance affect gravity?

Answers

Between the two interacting objects, more separation distance will result in a weaker gravitational force. As the two objects are separated from each other, the force of gravitational attraction between them also decreased.

I found a dollar on the street, so I went to the candy shop. Simple O Compound Complex de O Compound-Complex​

Answers

Answer:

Compound.

Explanation:

This sentence is compound bcuz it has the word so in it. "So" is a conjunction and when you add it like that the sentence becomes a compound sentence. A compound sentence is a sentence with more than one subject or predicate.

if you had the chance to be someone else, who would you choose to be? explain what would be good about being that person, and what might be difficult​

Answers

Answer:

Æthelflæd, Lady of the Mercians

Explanation:

If I had the chance, I would choose to be Æthelflæd, daughter of King Alfred the Great. She was a strong and fearless woman who participated in battles against Viking raids in England's old heptarchy during the tenth century.

It would be good to be Æthelflæd because she was not afraid to fight in battle for her country next to and against an army of violent men. Thus, she grew into an inspiring figure at a time when women were property of men. In fact, when her husband Æthelred became ill, she ruled Mercia, even though women were not usually powerful.

On the other hand, Æthelflæd must have found it difficult to make her path and maintain her power against so many men in a terribly sexist and competitive society. Besides, in those times there did not exist many technological or medical advances, so it must have been hard to live in cold  weather, with poor hygene habits and the spread of diseases. In fact, she died quite young, at about the age of forty-eight.

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