1. A ship is sailing in dense fog and it could be close to dangerous cliffs. The captain switches on the fog horn. The horn sounds and the echo is heard 4 s later. The speed of sound in air is 340 m/s.
a. Calculate the distance between the ship and the cliff.

b. Next time the fog horn sounds it takes 3.5 s for the echo to be heard. State whether the ship is further from, nearer to or at the same distance from the cliff.

Answers

Answer 1

Answer:

a. 1360 m

b. Closer since it takes a shorter amount of time for the fog horn to be heard

Explanation:

a. 340 · 4 = 1360

b. 340 · 3.5 = 1,190


Related Questions

Which statements justify that the dilation of triangle stu is an enlargement increasing its size by the magnitude of the scale factor? select two options. The triangle pre-image is closer to the point of dilation than the image. The triangle image is closer to the point of dilation than the pre-image. The value of the scale factor, , is between 0 and 1. The value of the scale factor, 6, is greater than 1. The vertices of the pre-image are collinear with the vertices of the image.

Answers

There are different ways to justify a statement. The statements that justify that the dilation of triangle STU are:

The triangle pre-image is closer to the point of dilation than the image.The value of the scale factor, 6, is greater than 1.

Dilation

Dilation is simply known as a process that is often employed for producing similar figures. All the point is said to be stretched outwards from the center point and it is then multiplied by the distances by the scale factor.

A dilation is also known to be a type of transformation that makes bigger or reduces a figure. (This is called the preimage).  With this process, a new figure or  image is created or produced.

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Answer:

The triangle pre-image is closer to the point of dilation than the image.

The value of the scale factor, 6, is greater than 1.

Explanation:

just did it

Kendra wants to write an opinion piece about her favorite food.

How should she organize her essay?
A. Group her reasons into paragraphs.
B. Explain all her reasons in the introduction.
C. Put her details in one paragraph and her reasons in another paragraph.
D. Put her topic in one paragraph and state her opinion in another paragraph.

Answers

Answer:

A

Explanation:

Grouping her reasons into paragraphs makes the most sense. Its more organized compared to the other options.

very far from earth (at r=[infinity]), a spacecraft has run out of fuel and its kinetic energy is zero. if only the gravitational force of the earth were to act on it (i.e., neglect the forces from the sun and other solar system objects), the spacecraft would eventually crash into the earth. the mass of the earth is me and its radius is re. neglect air resistance throughout this problem, since the spacecraft is primarily moving through the near vacuum of space.

Answers

By considering the conservation of energy, the speed V of the spacecraft when it eventually crash into the earth and  its distance from the center of the earth is r are 11172.6 m/s and 3294.6 m/s respectively.

Given that, r is at infinity when a spacecraft has run out of fuel and its kinetic energy is zero. if only the gravitational force of the earth were to act on the spacecraft would eventually crash into the earth.

Where

Mass of the earth  [tex]m_{e}[/tex] = 5.97 × [tex]10^{24}[/tex] kg

Radius of the earth [tex]R_{e}[/tex] = 6.38 × [tex]10^{6}[/tex] m

G = 6.67 x [tex]10^{-11}[/tex]N[tex]m^{2}kg^{-2}[/tex]

a.)  Since the spacecraft is primarily moving through the near vacuum of space, the speed V of the spacecraft when it eventually crash into the earth can be calculated by considering the conservation of energy.

The total initial energy  =  total final energy.

[tex]E_{i} = E_{f}[/tex]

[tex]K.E_{i}[/tex] + [tex]U_{i}[/tex] = [tex]K.E_{f}[/tex] + [tex]U_{f}[/tex]

where [tex]K.E_{i}[/tex] = 0

-G[tex]m_{e}[/tex]m/(r + [tex]R_{e}[/tex]) = 1/2m[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex]m)/[tex]R_{e}[/tex]

mass of the spacecraft will cancel out

G[tex]m_{e}[/tex]/(r + [tex]R_{e}[/tex]) = 1/2[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex])/[tex]R_{e}[/tex]

G[tex]m_{e}[/tex]/(r + [tex]R_{e}[/tex]) = 0 since r is at infinity.

0 =  1/2[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex])/[tex]R_{e}[/tex]

Substitute all the parameters into the equation above.

0 = 0.5[tex]V^{2}[/tex] + ( -6.67 x [tex]10^{-11}[/tex] x 5.97 x [tex]10^{24}[/tex] )/6.38 x [tex]10^{6}[/tex]

0.5[tex]V^{2}[/tex] = 62,413,636.36

[tex]V^{2}[/tex] =  62,413,636.36 / 0.5

[tex]V^{2}[/tex] = 124,827,272.7

V = [tex]\sqrt{124,827,272.7}[/tex]

V = 11172.6 m/s

b.) Given that the distance from the earth r = x([tex]R_{e}[/tex])

That is,

r = 11.5 x 6.38 x [tex]10^{6}[/tex]

r = 73,370,000 m

To find the spacecraft's speed when its distance from the center of the earth is r, we will use the same formula. That is,

[tex]K.E_{i}[/tex] + [tex]U_{i}[/tex] = [tex]K.E_{f}[/tex] + [tex]U_{f}[/tex]

0 =  1/2[tex]V^{2}[/tex] + ( -G[tex]m_{e}[/tex])/r

Substitute all the parameters into the formula

0 = 0.5[tex]V^{2}[/tex] + ( -6.67 x [tex]10^{-11}[/tex] x 5.97 x [tex]10^{24}[/tex] )/ 73,370,000

0.5[tex]V^{2}[/tex] = 5427272.727

[tex]V^{2}[/tex] = 10854545.45

V = [tex]\sqrt{10854545.45}[/tex]

V = 3294.6 m/s

Therefore, the speed V of the spacecraft when it eventually crash into the earth and  its distance from the center of the earth is r are 11172.6 m/s and

3294.6 m/s respectively.

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what viewpoint is conveyed by sophocles through the following lines spoken by antigone to creon regarding his decree that she disobeyed? creon. didst thou, then, dare to disobey these laws? antig. yes, for it was not zeus who gave them forth, nor justice, dwelling with the gods below, who traced these laws for all the sons of men; nor did i deem thy edicts strong enough, coming from mortal man, to set at naught the unwritten laws of god that know not change. the government is always the highest law of the land. religious law is above or greater than man's law. the laws of the government are sometimes correct and sometimes incorrect. one must be willing to accept punishment for breaking laws.

Answers

There are different kinds of laws. The viewpoint that is conveyed by Sophocles through the following lines spoken by Antigone to Creon regarding his decree that she disobeyed is that religious law is above or greater than man's law.

In the text, we can see Creon emphasizes on the unwritten laws of gods that know not change. She is trying too acknowledge the fact that the laws of the gods are greater than man's law and cannot be altered for any thing at all.

The Antigone is known too  be a tragedy play that was written by the ancient Greek playwright called Sophocles. It was known to be written around 442 BCE.

The play centers around Antigone’s burial of her brother Polynices (Polyneices), after defying the laws of Creon and the state, and the outcomes  of her act of civil disobedience.

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If you don't sleep enough at night you will be very ____ in the morning.

Answers

Answer:

cansado

Explanation:

If you don't sleep enough at night, you will be very cansado (tired) in the morning.

What is the central idea of this passage sundays are days of rest and ceremony on the farm.

Answers

Answer:

A

Explanation:

While on vacation in guadalajara, you are shopping downtown and notice the following sign hanging in a store window. What type of store is this? clothing store candy store jewelry store show store.

Answers

Answer:

Jewellery Store

Explanation:

pls mark me as brainliest!!

Answer:

Jewellery Store

Explanation:

Jewellery Store

Reread the following quotation from paragraph 75: "oh god! to hear the insect on the leaf pronouncing on the too much life among his hungry brothers in the dust!" which of the following best states what this quote reveals about the ghost of christmas present's and scrooge's differing points of view?.

Answers

There are different kinds of quotes. The option that best state what this quote reveals about the Ghost of Christmas Present’s and Scrooge’s differing points of view is;

It suggests that the spirit believes Scrooge is oblivious to his own suffering, like an insect that does not know what lies beyond its small environment.

The Ghost of Christmas Present is known to be a fictional story about a Christmas Spirits who visited Ebenezer Scrooge in the 1843. The aim was to offer him an opportunity for redemption.

People sometimes do not know what they are passing through. Scrooge wanted a change and as such was visited by three spirits. They made him realize things he had forgotten about himself.

See full question below

Reread the following quotation from paragraph 75: “Oh God! to hear the Insect on the leaf pronouncing on the too much life among his hungry brothers in the dust!” Which of the following best states what this quote reveals about the Ghost of Christmas Present’s and Scrooge’s differing points of view?

A. This reveals the spirit’s low opinion of Scrooge, who has a high opinion of his  own status.

B. This reveals the spirit considers Scrooge and other humans to be insects in  comparison to his power and wisdom.

C. This quote suggests that the spirit believes Scrooge is oblivious to his own  suffering, like an insect that does not know what lies beyond its small

environment.

D. This quote recalls Scrooge’s earlier words in favor of the poor dying off to lower  the population; the spirit puts Scrooge in his place, revealing that while Scrooge  may consider himself above others, the spirit knows to value the lives of other  Beings.

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What must a scientist do in order to develop a testable hypothesis brainly.

Answers

Answer: The correct answer is D. Ask a question that can be answered by making observations.

Explanation:

Basically, in order to develop a testable hypothesis, scientists must adhere to the guidelines of the scientific method.

The scientific method is usually understood to be a so-called hypothetical-deductive method, the core of which is to make hypotheses based on observations or measurements, to make predictions based on them and to check the validity of predictions by repeated experiments. More generally, the scientific method is a general way of obtaining solid knowledge, using many means of proof, both empirical and theoretical, to achieve certainty. The scientific method is a widely recognized tool in the scientific community for seeking objectivity, reliability and transparency in research.

Quantities that can be described completely by their magnitude or size are called vector quantities.

Answers

In physics, there are two types of quantities

Scalar quantityVector quantity

Scalar quantities are quantities that have magnitude but no direction. Examples of such quantities include speed, pressure, etc

Vector quantities are quantities that have both magnitude and direction. Examples of such quantities include velocity, acceleration etc.

Vector quantities are represented by an arrow over the position of the object to denote its direction.

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What happens when the barrel goes over the waterfall?.

Answers

the barrel will crash down

why is the standard deviation preferable to the range as a measure of​ variation?

Answers

Answer:

Explanation:

The standard deviation is preferable to the range as a measure of variation because the standard deviation takes into account all of the​ observations, whereas the range considers only the largest and smallest ones.

Select the correct answer. Which is a feature of a roth ira? a. You must pay tax if you withdraw your earnings once you're 59. 5 years old. B. You can withdraw your earnings once you're 59. 5 years old but must pay a penalty. C. You can withdraw your earnings once you're 59. 5 years old without paying a penalty.

Answers

I think the answer is C

you can withdraw your earnings once you're 59. 5 years old without paying a penalty

Abrir abro, abris, abri, abrimos, abrís, abrin abro, abres, abre, abrimos, abrís, abren abro, abras, abra, abramos, abrís, abran abro, abres, abre, abremos, abrís, abren.

Answers

Answer:

Hi

Explanation:

Sorry but I don't understand what you are asking, is there any way you could elaborate??

Three people made the diagrams above to show what they think the moon looks like when it is seen from above (top view). In these diagrams, the sunlight is coming from the left, as shown by the arrows. Which diagram is accurate and why?.

Answers

When a diagram or a technical drawing is made, it can be either in three-dimensional mode (3D) or two-dimensional mode (2D) and can be viewed in different ways depending on the perspective.

With this in mind, there are different ways of viewing a drawing or diagram and they include:

Top ViewSide ViewFront View, etc

Please note that your question is incomplete so I gave you a general overview to help you get a better understanding of the concept.

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Answer:c

Explanation:

A software developer wants to add a new feature to an existing application operating in the cloud, but only wants to pay for the computing time the code actually uses when it is called.

Answers

Answer:aye bro answer my question

Explanation:

Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation. Y = x squared + x + 6 a. (0. 5, -5. 75) c. (-0. 5, 6) b. (-0. 5, 5. 75) d. (0. 5, 5. 75).

Answers

The vertex is b. (-0.5, 5.75)

Why did the elephant jump up and down riddle answer.

Answers

Explanation:

because he was thirsty?

or was he doing some exercise?

><

Answer:

Because he saw a mouse

Explanation:

Well first of all, the elephant can't jump... so yeah... the questions itself is WRONG

which interest group is an example of a single-issue interest group? everytown for gun safety national league of cities center for health & gender equity american civil liberties union (aclu)

Answers

Answer:

everytown for gun safety

Explanation:

got it right on edge 2021

It should be noted that the interest group is an example of a single-issue interest group is everytown for gun safety

According to the question, we are to discuss interest group and how it works and the example.

As a result of this we can discuss Interest group as special interest groups that are set up for various forms of advocacy  so they can influence public opinion.

Therefore, everytown for gun safety serves as example of a single-issue interest group.

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Which two properties of equality could zoe use to finish solving for x? either the addition or subtraction property of equality either the multiplication or division property of equality either the addition or multiplication property of equality either the subtraction or division property of equality.

Answers

Zoe can solve the equation using (b)  either the multiplication or division property of equality

The equation is given as:

[tex]3x = -6[/tex]

Zoe can solve the equation as follows.

First, divide both sides of the equation by 3

This gives

[tex]\frac{3x}{3} = -\frac 63[/tex]

[tex]x = -2[/tex]

Also, the equation can be solved by multiplying both sides by 1/3.

This gives

[tex]3x \times \frac{1}{3} = -6 \times \frac{1}{3}[/tex]

[tex]x = -2[/tex]

Hence, Zoe can solve the equation using (b)  either the multiplication or division property of equality

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Which is a type of heat transfer that causes the air at the top floor.

Answers

Explanation:

Convection is the the transfer of heat my the physical movement of hot masses of air. As air is heated, it expands (as do all objects). As it expands, it becomes lighter then the surrounding air and it rises.

Since customers who go to retail stores often know what they want or have a purpose to being at the store in the first place, sellers do not have to do much in the b2c selling environment.

Answers

Answer:

Explanation:Prospecting or qualifying

if tu = 6 units, what must be true? su + ut = rt rt + tu = rs rs + su = ru tu + us = rs

Answers

Answer:

Explanation:

If TU=6 then SU+UT= RT

What is the primary purpose of these stage directions? to show interactions between characters to direct actions that take place onstage to describe a character’s appearance to indicate a character’s tone of voice.

Answers

Answer:

B) to direct actions that take place onstage

EDGE2022

Answer:

B. to direct actions that take place onstage

Explanation:

What is the primary purpose of these stage directions?

To direct actions that take place onstage

Select the correct answer. Consider these functions. F(x) = -2x − 5 g(x) = x − 2 which graph shows the composite function (f ◦ g)(x)? a. B. C. D.

Answers

Composite functions are functions formed by combining multiple functions that may or may not be the same.

The composite function (f o g)(x) is -2x - 1

The functions are given as:

[tex]f(x) =-2x - 5[/tex]

[tex]g(x) = x - 2[/tex]

The composite function (f o g)(x) is calculated using:

[tex](f\ o\ g)(x) = f(g(x))[/tex]

Given that:

[tex]f(x) =-2x - 5[/tex]

Substitute g(x) for x in the above equation

[tex]f(g(x)) =-2g(x) - 5[/tex]

Substitute [tex]g(x) = x - 2[/tex]

[tex]f(g(x)) =-2(x - 2) - 5[/tex]

Expand

[tex]f(g(x)) =-2x + 4 - 5[/tex]

So, we have:

[tex]f(g(x)) =-2x -1[/tex]

Hence, the composite function (f o g)(x) is -2x - 1

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Iq is determined by brainly.

Answers

Answer:

False

Explanation:

Intelligence Quotient (IQ) is a number representing a person's reasoning ability. It's determined by dividing a person's score on a special test by his or her age, then multiplying by 100

Answer:

false

Explanation:

have a good night :)

what is the effective nuclear charge for a 2nd row electron in sulfur?

Answers

Sulfur valence electrons have an effective nuclear charge of +6.

What are effective nuclear charge?

Effective nuclear charge is defined as the true positive nuclear charge that an electron in a multi-electron atom experiences. Electrons and protons are the two elements that cause the effective nuclear charge to rise. Zeff = Z - S is the actual nuclear charge.

A sulfur second row electron's effective nuclear charge is 14. Since sulfur contains 16 protons, or 16 atomic numbers, we know that there are 2 electrons in its first shell or orbit, which due to its rapid speed creates a shielding effect.

Thus, sulfur valence electrons have an effective nuclear charge of +6.

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#SPJ1

Complete the equation of the line through (-9 7) and (-6 -3).

Answers

The answer is:

Point Slope Form:

y-7 = -10/3 * (x + 9)

Slope-intercept form:

y= -10/3x - 23

The ratio between the amounts of muscle on your body to the amount of fat on your body is called.

Answers

Answer:

The ratio between the amount of muscle on your body to the amount of fat on your body is called. Body composition

a system absorbs 52 joules of heat and does work using 25 joules of energy. what is the change in the internal energy of the system? 25 joules 27 joules 52 joules 77 joules

Answers

The change in the internal energy of the system is 27 joules

From the question given above, the following data were obtained:

Heat absorbed (Q) = 52 JWork (W) = –25 J (since work is done by the system) Change in internal energy (ΔU) =?

The change in the internal energy of the system can be obtained as follow:

ΔU = Q + W

ΔU = 52 + (–25)

ΔU = 52 – 25

ΔU = 27 J

Therefore, the change in the internal energy of the system is 27 J

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Answer:

27 J

Explanation:

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