What causes rocks in a stream to be smooth?
Earthquakes
Volcanoes
Weathering
Movement of fish

What causes rocks in a stream to be smooth?
Earthquakes
Volcanoes
Weathering
Movement of fish

What causes rocks in a stream to be smooth?
Earthquakes
Volcanoes
Weathering
Movement of fish

What causes rocks in a stream to be smooth?
Earthquakes
Volcanoes
Weathering
Movement of fish

Answers

Answer 1

Answer:

Weathering makes the rocks smooth

Answer 2

Answer:Weathering

Explanation:


Related Questions

How many forest fires occur per year on average in pacific northwest america? please provide 2 sources for the data

Answers

Answer:

70,000 wildfires per year

Explanation:

Climate change indicators and Wildfires in the Untied States are the sources for the data

Answer:

70000 wildfires approximately

Explanation:

source: National Interagency Fire Center

US drought monitor

Hope it helps. Cheers!

The diagram shows layers of rock with fossils.

Which fossil is the oldest ?

The diagram shows layers of rock with fossils.Which fossil is the oldest ?

Answers

Answer:

Whichever one is on the bottom in the oldest.

Explanation:

Over time, dust and dirt will cover older fossils.

Buttom is the oldest because the rock get made over time so it has to be the bottom haha I know sun one answered already but just wanted u to know that the person is telling the truth

Suppose that deforestation continues to increase as the human population increases. How will this most likely impact the Earth?


A. Global temperatures will increase.
B. Volcanic eruptions will decrease.
C. Global temperatures will decrease.
D. Volcanic eruptions will increase.

Suppose that deforestation continues to increase as the human population increases. How will this most

Answers

answer: A

I just did the test

A

explanation: deforestation along with a rising human population will cause co2 emissions to rise contributing to climate change

Describe one way our understanding of the atom has changed.

Answers

Answer:

Explanation:

negitive and a negitive make a positive

Scientists changed the model so that it could explain the new evidence

Please I need answers! At least just question 1 and 4 As fast as u can.

Here is the translation.

1- What do the letters in the photograph above correspond to? Reply with
precision using the vocabulary of the course.
2- What is the place of Brazilian agriculture in the world?
3- Shows that the cultivation of soy occupies a large place in Brazil.
4- Pick out two agricultural techniques in the text that show that agriculture in the
Mato Grosso is intensive.

Please I need answers! At least just question 1 and 4 As fast as u can. Here is the translation. 1- What
Please I need answers! At least just question 1 and 4 As fast as u can. Here is the translation. 1- What

Answers

Answer:

1-dirt bush tree

Explanation:

Answer:

dirt road; some bushes; a tree

Explanation:

there shouldn't be because the answer's right in front of you: the picture

What is the plate boundary that is responsible for earthquakes between Africa and South America?

Answers

The Mid-Atlantic Ridge is the plate barrier that causes earthquakes between South America and Africa. Two tectonic plates are moving apart along the divergent plate boundary known as the Mid-Atlantic Ridge. Two of the many plates that make up the crust of the Earth are the African Plate and the South American Plate. As these plates drift apart, magma rises to fill the space and solidifies, forming new crust. As the plates move and rub against one another, a process known as seafloor spreading can result in earthquakes.

To learn more about plate boundaries visit: https://brainly.com/question/18256552
On the west side of South America, it experiences devastating earthquakes due to the convergent plate tectonic boundaries. But the eastern edge lies in the Atlantic Ocean at a divergent plate boundary. Along the African Plate boundary, these two plate boundaries pull apart from each other.

What forms when oceanic lithosphere collides with continental lithosphere at a convergent boundary? Explain.

Answers

Answer:

When oceanic lithosphere collides with continental lithosphere at a convergent boundary, a subduction zone is formed. A subduction zone is a tectonic boundary where one lithospheric plate is forced beneath another plate and descends into the Earth's mantle.

Here's how the process occurs:

Oceanic lithosphere: The oceanic lithosphere, which is denser than the continental lithosphere, starts to converge with the continental lithosphere.

Subduction: As the oceanic plate moves towards the continental plate, it starts to subduct (dive) beneath the continental plate. This subduction occurs because the oceanic lithosphere is denser and more negatively buoyant than the continental lithosphere.

Trench formation: The point where the oceanic lithosphere begins to subduct beneath the continental lithosphere forms a deep oceanic trench. The trench marks the surface expression of the subduction zone.

Volcanic activity: As the oceanic lithosphere descends into the mantle, it undergoes intense heat and pressure. The subducting plate releases water-rich minerals and undergoes partial melting. This process generates magma, which rises through the overriding continental plate.

Volcanic arc formation: The magma generated from the subducting plate forms a chain of volcanoes known as a volcanic arc on the overriding continental plate. Examples of such volcanic arcs include the Andes in South America and the Cascades in North America.

Earthquakes and mountain building: As the subducting plate continues to descend into the mantle, it can cause intense pressure and deformation in the overriding plate. This leads to earthquakes and may result in the uplift and deformation of the continental crust, contributing to mountain building. Examples of mountains formed through the collision of oceanic and continental lithosphere include the Andes and the Himalayas.

Explanation:

In summary, when oceanic lithosphere collides with continental lithosphere at a convergent boundary, a subduction zone is formed. This results in the formation of a deep oceanic trench, volcanic activity and the creation of a volcanic arc on the overriding plate, earthquakes, and mountain building. The collision and subduction of oceanic lithosphere play a crucial role in shaping the Earth's surface and in the formation of significant geological features.

When oceanic lithosphere collides with a continental lithosphere at a convergent boundary, several geological features, and processes occur. The specific outcome depends on the relative density and age of the lithospheric plates involved the two most common scenarios are subduction zones, and collision and Mountain Building

Choose the best location for industries (factories, manufacturing, etc.):

mountains
plains
oceans
plateaus

Answers

Explanation:

it is plains because, they have a wide space of room for a location.

plains because there is a lot of room

The students wanted to determine what happened to groundwater levels when an aquifer is exposed to a long term drought situation. What could they do next to simulate this next environmental condition?
Responses:A Shine a very bright light on the model for about a month. Then meansure the level of groundwater in their model.Shine a very bright light on the model for about a month. Then meansure the level of groundwater in their model.
B Stop pouring water into their model and measure the groundwater level after a few weeks time.Stop pouring water into their model and measure the groundwater level after a few weeks time.
C Stop pouring rain in, shine a light on the model during the day, then measure the groundwater after a prescribed time period.Stop pouring rain in, shine a light on the model during the day, then measure the groundwater after a prescribed time period.
D Turn on a space heater as well as a bright light. Leave both on for a long time. Measure the groundwater level.

Answers

Answer:B

Explanation:

C is the answer. Hope you have a great day!

WILL GIVE BRAINLIEST!!! PLEASE HELP!!!

Why are gold, silver, iron, nickel, tin, and zinc found in mountains or deserts

Answers

Answer:

As the mountains and cliffs are exposed over years and years of weathering, more and more of these California gold deposits are exposed and washed into our streams and rivers.

Explanation:

im not sure

As earth formed , heavy elements like iron sunk to earths core.

From the information obtained from this lab,describe the roundness and smoothness of earth

Info is:

polar diameter equatorial diameter roundness ratio

Earth: 12714km 12756km 0. 996
Globe: 15. 3cm 15. 7cm 0. 974

1. Height of Mt everest in cm Is 0. 3cm in diagram
2. Actual height of Mt everest 8. 8 km
3. Average diameter of earth (km) 12735km
4. Average diameter of relief globe diameter(cm) 15. 5cm
5. Correct scale for relief globe height of everest(cm) 0. 011 or 0. 01
6. Percent deviation 2627%

Answers

The roundness and the smoothness of the earth has been described using the information contained below

What is the roundness and the smoothness of the earth?

From the information provided, we can determine that the Earth has a polar diameter of 12,714 km and an equatorial diameter of 12,756 km, giving it a roundness ratio of 0.996. This means that the Earth is slightly flattened at the poles and bulging at the equator, which is consistent with its oblate spheroid shape.

As for smoothness, the information provided does not directly relate to the Earth's surface smoothness. However, we can infer that the surface of the Earth is not completely smooth due to the presence of Mount Everest, which has an actual height of 8.8 km but is represented on the relief globe as only 0.3 cm or 0.011-0.01 cm, depending on the correct scale used. This indicates that the Earth's surface has significant variation in elevation.

The percent deviation of 2627% indicates a large discrepancy between the actual height of Mount Everest and its representation on the relief globe. This may be due to the limitations of the relief globe as a model of the Earth, as it cannot accurately represent the scale and elevation of features such as mountains.

Read more on the earth here:https://brainly.com/question/25624188

#SPJ1

Partners who use equality and compromise will: A. Take turns doing different things each partner likes B. Pressure each other to give up things they like C. Only hang out with one partner's friends D. Change their hobbies and desires to match their partner's

Answers

A. Take turns doing different things each partner likes
The answer is A because taking turns and trying stuff for your partner is comprising for each other. It can’t be the others because the first two are controlling and the last is full on change and no equality between the two partners.

you travel to the northwest part of the United States, you can see the
beautiful Cascade Range of voicanic mountains in Viashington and
Oregon Explain how volcanoes like Mouni Rainier, Mount Saint Helens
and Mount Hood formed in this area.

Answers

The cascade volcanoes were formed by the subduction of the Juan De Fuca, Explorer and the Gorda Plate (remnants of the much larger Farallon Plate) under the North American Plate alone the Cascadia subduction zone
Heheheehhehehehehehehhehehehehehehehehehheheheheheheheheheheheheheueheheheheheheheheheheehehe

Writing About How the Great Plains and Rocky Mountains Formed

Select a claim and then write a report to Dr. Lewis explaining why you support that claim.

Claim 1: The sediment that formed the Great Plains came from the rock of the Rocky Mountains.
Claim 2: The magma that formed the Rocky Mountains came from the rock of the Great Plains.
Choose the claim that is best supported by evidence, explaining why the rock of the Rocky Mountains and Great Plains have surprisingly similar mineral compositions.

Answers

Answer:

Brainlist me if it helps!

Explanation:

I choose Claim 1: The sediment that formed the Great Plains came from the rock of the Rocky Mountains.

The rock of the Rocky Mountains and Great Plains have surprisingly similar mineral compositions because they were both formed by the same process: the uplifting and erosion of the Rocky Mountains.

The Rocky Mountains were formed by the collision of tectonic plates, which caused the magma beneath the Earth's surface to rise and solidify. Over millions of years, the mountains were uplifted and exposed to the elements, and the rock was subjected to weathering and erosion.

The sediment that was produced by this process was carried by rivers and deposited on the Great Plains, where it eventually formed the sedimentary rock that makes up the region today. This process of erosion and sedimentation has been occurring for millions of years, and is still ongoing.

There is strong evidence to support this claim. For example, the rock of the Great Plains and Rocky Mountains both contain similar minerals and fossilized plant and animal remains, which suggests that they were formed from the same material. Additionally, the rock layers on the Great Plains are arranged in a similar pattern to the rock layers on the Rocky Mountains, indicating that they were both formed by the same process.

Overall, the evidence suggests that the sediment that formed the Great Plains came from the rock of the Rocky Mountains, rather than the other way around.

Answer: The Correct Answer Is Claim 2

Explanation: The Sediment That Formed from the great plains and the rocky mountains came from the energy in the earth's Interior

Which term defines the average number of people living within a square mile?


population distribution


population density


doubling time


birth rate

Answers

Answer:

The correct answer is population density.

Explanation:

population density is the amount of people living within a set unit.

population density is the correct answer

Explain two problems faced by people living in slums in Dharavi, India (4) Sentence Starter - One of the main problems faced by people living Dharavi is ...

Please help me. I have no clue.

Answers

Answer:

One of the main problems faced by people living in Dharavi is the increasing population.

Explanation:

The increasing population in Dharavi makes it really hard for the people who are already living in the slums, as slums, in general, have a lack of privacy and a lack of hygiene. There is a lack of privacy in slums because what they are living in is literally made out of waste, therefore, there is no security for people living their as well as their children. There is a lack of hygiene as there is not any clean water which leads to pests and diseases surrounding the area. This is why people get ill and badly sick as it is not very easy for the people living in Dharavi to get hold of medicines. So this is one of the main problems people face in Dharavi, as it is very important for all people to have a  good and healthy lifestyle.

- hope that helped

Yh over population, waste in the waters and mud and it has lots of diseases

*SOMEONE HELP PLEASE ASAP*! The country I chose is Greenland

*SOMEONE HELP PLEASE ASAP*! The country I chose is Greenland

Answers

Answer:

Explanation:

Greenland is located between the Arctic Ocean and the North Atlantic Ocean, northeast of Canada and northwest of Iceland. The territory comprises the island of Greenland—the largest island in the world—and more than a hundred other smaller islands (see alphabetic list). Greenland has a 1.2 kilometre (0.75 mi) long border with Canada on Hans Island. A sparse population is confined to small settlements along certain sectors of the coast. Greenland possesses the world's second-largest ice sheet.

Greenland sits atop the Greenland plate, a subplate of the North American plate.[1][2] The Greenland craton is made up of some of the oldest rocks on the face of the earth. The Isua greenstone belt in southwestern Greenland contains the oldest known rocks on Earth, dated at 3.7–3.8 billion years old.[3]

The vegetation is generally sparse, with the only patch of forested land being found in Nanortalik Municipality in the extreme south near Cape Farewell.

The climate is arctic to subarctic, with cool summers and cold winters. The terrain is mostly a flat but gradually sloping icecap that covers all land except for a narrow, mountainous, barren, rocky coast. The lowest elevation is sea level and the highest elevation is the summit of Gunnbjørn Fjeld, the highest point in the Arctic at 3,694 meters (12,119 ft). The northernmost point of the island of Greenland is Cape Morris Jesup, discovered by Admiral Robert Peary in 1900. Natural resources include zinc, lead, iron ore, coal, molybdenum, gold, platinum, uranium, hydropower and fish.

Greenland is colder and Iceland is warmer it should be the opposite duhh

What were all 13 of the colonies? Please help. Will give brainliest!

Answers

Answer:

Hey there!

Here is a list of the thirteen colonies:

New Hampshire

Massachusetts

Connecticut

Rhode Island

New York

New Jersey

Pennsylvania

Delaware

Maryland

Virginia

North Carolina

South Carolina

Georgia

Let me know if this helps :)

Answer:

Here are the 13 colonies, all in order of with the date they were founded

Virginia - 1607Massachusetts - 1620New York - 1626Maryland - 1633Rhode Island - 1636Connecticut - 1636Delaware - 1638New Hampshire - 1638North Carolina - 1653South Carolina - 1663New Jersey - 1664Pennsylvania - 1682Georgia - 1732

Hope this helps! :)

If you started in the city of D and traveled to the city of A, what direction would
you go?

If you started in the city of D and traveled to the city of A, what direction wouldyou go?

Answers

From d to a is northwest.

Out of these two regions, which one is drier than the other?:
The Northwest
The west

Answers

Answer:

The west

Explanation:

s warm air ascends over the mountain from the west, any remaining moisture from the Pacific Ocean is condensed out into clouds. 

Answer:The westExplanation:To the west, there are really two things that prevent that moisture. Mexico leaves us landlocked from any moisture streaming up into the area from the south. Another thing we have to deal with is the Sierra Nevada mountains over California, Oregon, and Washington.

Which transformation Rotates a figure 180° clockwise about the origin?
a. (X,Y) ➔ (-X,Y)
b. (X,Y) ➔(-X, -Y)
c. (X,Y) ➔ (Y, -X)
d. (X,Y) ➔(-Y, X)

Answers

Answer:

answer is b X,y to -X,-y

Explanation:

The rule for a rotation by 180° about the origin is (x,y)→(−x,−y) .

The answer will be B.

Remember the rules (clockwise):
90° = (x,y) -> (y,-x)
180° = (x,y) -> (-x,-y)
270° = (x,y) -> (-y,x)

review the map Where is the great lakes

review the map Where is the great lakes

Answers

The Answer is b

the great lakes is american territory

Answer:

B

Explanation:

They're near the border

Please help, this one has to be complete by today...
Which types of landforms/activity can be found by this type of boundary?[Image is uploaded]
1. mid-ocean ridges
2. earthquakes
3. volcanoes
4. deep ocean trenches
5. new crust
6. fault lines
7. mountains
8. rift valleys

Answers

Answer: mid-ocean ridges

Explanation:

Answer- 1. Mid-ocean ridges

Which of the following explains why earthquakes are difficult to predict?

Foreshocks are sometimes in a different location from the mainshock.
Foreshocks are sometimes too small to detect and measure
The processes that cause seismic waves occur too fast to measure early.
The processes that cause earthquakes occur too far beneath the earth’s surface.

Answers

Answer:

I'm pretty sure it is C

Explanation:

yeah it's C

It is going to be the 3rd one

Some plants have leaves that are poisonous to some animals. Which kind of adaptation is this?

A- reproduction
B- survival
C- respiration
D- defense
THANKSSS SMM

Answers

Answer:

the answer is B (survival) and D (defense).

Explanation:

B~ to kill predators that could be harmful

D~ to defend themselves from predators that could be harmful! I'm really sorry if it was a one answer question but hope this helpssss x

Answer:

the answer is B (survival) and D (defense).

Explanation:

i did it

The Intertropical Convergence Zone
(ITCZ) is an area in Africa that
produces
A. Heavy Rainfall
B. A and C
C. Wet and Dry Seasons

Answers

Answer:

b-a nd c

Explanation:

i got it right

I believe it is B because when i researched it it technically said spreading rain around the equator and it said wet and dry seasons

What happened to the sand? Did it just disappear? Was the sand pushed away, or was it pulled away? What do you think wore the sand away? Where did it end up?

Answers

Answer: Well i mean if were talking about beach sand than no it did not disappear when the ocean waves crash the shore the waves bring the sand back with them since the ocean has salt in it it kind of dissolves the sand into a mushy kind of thing which is what you feel when you go into the water.

beach sand does not disappear, due to the waves it is brought farther up onto shore, and also brought back further into the water

I NEED HELP!!!! Question: Describe a common biotic and a common abiotic component of two terrestrial ecosystems. Then, describe a common biotic and a common abiotic component of two aquatic ecosystems.
Can someone explain it in a simple form?

Answers

abiotic factors are water, air, soil, sunlight, and minerals. Biotic factors are living or once-living organisms in the ecosystem. These are obtained from the biosphere and are capable of reproduction. Examples of biotic factors are animals, birds, plants, fungi, and other similar organisms.
We can consider the city and the forest as two terrestrial ecosystems. In these two ecosystems, we can consider humans and plants as biotic components. Since the entire biological community is considered to be biotic environments, that is, it lives from a place. As abiotic components we can consider sunlight and soil. This is because the abiotic components are everything that has no life.
Following the same reasoning, we can consider fish and water as the biotic and abiotic component of the aquatic ecosystem.

YT Video: Urban Migration For Young Chinese on the Rise


I can't seem to find the answer in the video.


My question: what are some major complaints from these migrants?

i need the answer asap, thanks!

Answers

Answer:

Below.

Explanation:

1. Language barriers.

2. Employment opportunities.

3. Housing.

4. Access to local services.

5. Transportation issues.

6. Cultural differences.

7. Raising children.

8. Prejudice.

Hoped this helped. I am un-sure if I am telling the right thing though. Please pardon me about that.

Hoped this helped.

Could be language things to do with culture differences or smth

Over the course of 130 years, a lighthouse “moved” closer and closer to the beach. Of course, the lighthouse didn’t travel – it was the beach that moved! What natural force could cause this beach to move further and further inland? Explain your answer in at least three sentences.

Answers

Answer:

Wind, waves and currents are natural forces that easily move the unconsolidated sand and soils in the coastal area, resulting in rapid changes in the position of the shoreline. Excluding the impact of human activity, these processes are simply natural evolutionary phenonema.

Explanation:

Other Questions
the loth term of the arithmetic sequence 3x + 1, x + 4, -x + 7, what is 14/27 divided by 7 plz help add me on ps4 Glizzy-KNG if you ever want to play Thanks CAN YOU GUYS PLEASE HELP ME IN MY SPANISH HOMEWORK I WILL GIVE BRAINLIEST contaminated: pure :: indomitable : feedable a. unconquerableb. rhythmicc. cleand. weak Analogy (English Subject) What is the theme?I was climbing up a mountain-pathWith many things to do,Important business of my own,And other people's too,[5]When I ran against a PrejudiceThat quite cut off the view.My work was such as could not wait,My path quite clearly showed,My strength and time were limited,[10]I carried quite a load;And there that hulking PrejudiceSat all across the road.So I spoke to him politely,For he was huge and high,[15]And begged that he would move a bitAnd let me travel by.He smiled, but as for moving! He didn't even try.And then I reasoned quietly[20]With that colossal mule:My time was short no other path The mountain winds were cool.I argued like a Solomon;He sat there like a fool.[25]Then I flew into a passion,and I danced and howled and swore.I pelted and belabored himTill I was stiff and sore;He got as mad as I did [30]But he sat there as before.And then I begged him on my knees;I might be kneeling stillIf so I hoped to move that massOf obdurate ill-will [35]As well invite the monumentTo vacate Bunker Hill!So I sat before him helpless,In an ecstasy of woe The mountain mists were rising fast,[40]The sun was sinking slow When a sudden inspiration came,As sudden winds do blow.I took my hat, I took my stick,My load I settled fair,[45]I approached that awful incubusWith an absent-minded air And I walked directly through him,As if he wasn't there! if you want to receive periodic, regular income from your mutual fund account you would set up a Please explain how you would determine whether a particular molecular compound was polar if you were given the lewis structure. 3 skills on how to respond to appropriately to questions when answering examination 29- The etiologic agent in pneumococcal pneumonia is S. pneumoniae. Why is the organism sometime called Diplococcus pneumoniae? The capsule of S. pneumoniae is well developed and inhibits phagocytosis a successful marketing strategy pairs multiple choice question. the competition ideas and customer needs. company goals with employee strengths. opportunities with a company's resources and goals. financial goals with company strengths. Question 9 (1 point)community college students who graduate earn an associate degree after theycomplete around hours of courseworkA) 50B) 600C) 20D) 100 A wave of mergers peaked between 1897 and 1904. the largest of these mergers created the first billion dollar american corporation. what was that corporation? group of answer choices The following are selected transactions of Blanco Company. Blanco prepares financial statements quarterly.Jan. 2Purchased merchandise on account from Nunez Company, $34,800, terms 3/10, n/30. (Blanco uses the perpetual inventory system.)Feb. 1Issued a 9%, 2-month, $34,800 note to Nunez in payment of account.Mar. 31Accrued interest for 2 months on Nunez note.Apr. 1Paid face value and interest on Nunez note.July 1Purchased equipment from Marson Equipment paying $11,400 in cash and signing a 10%, 3-month, $52,800 note.Sept. 30Accrued interest for 3 months on Marson note.Oct. 1Paid face value and interest on Marson note.Dec. 1Borrowed $21,600 from the Paola Bank by issuing a 3-month, 8% note with a face value of $21,600.Dec. 31Recognized interest expense for 1 month on Paola Bank note.Required:1. Prepare journal entries for the list of transactions and events.2. Post to the accounts; notes payable, interest payable, and interest expense.3. Show the balance sheet presentation of notes and interest payable at December 31. Awnsers A. The graph of h(x) is the graph of f(x) vertically compressed by a factor of 6.B. The graph of h(x) is the graph of f(x) shifted 1/6 unit right.C. The graph of h(x) is the graph of f(x) horizontally compressed by a factor of 6.D. The graph of h(x) is the graph of f(x) horizontally stretched by a factor of 6. The elephants at the zoo eat 1 1/2 buckets of bananas each day. The zookeeper bought 7 1/2 buckets of bananas. How many days will the bananas last? 3. Data Processing - Create a test set and put it aside (discuss about the method that you used to split the data) How do you handle missing values? - How do you handle categorical features? - Do you need to normalize your data and how you normalize it? 4. Model Selection and Training Select different models and using K-fold cross-validation select the one with the best results. Report on the performance results you obtain for different models. The uniform sales tax rate for all of Georgia is ___. 1% 2% 4% 5%2.What does the "L" and "O" mean in "SPLOST"? Legally On Local Option Local Opinion Levied Optionally3.What kind of goods would be subject to an excise tax? clothes computers gasoline produce Which type of RNA functions as the location where proteins are made? mRNA rRNA tRNA siRNA Using enthalpies of formation on our data table, which is closest to the enthalpy change for the reaction below?CH4 (8) + CI2 (g) - CH3CI (8) + HCI (g)Enthalpy values you can use are:CH4 (8): - 74.6CHCI (g): - 81.9HCI (g):-92.307 if (z)= y+j represents the complex. = Potenial for an electric field and = 9 + x / (x+y)2 (x-y) + (x+y) - 2xy determine the Function (z) ? Q6) find the image of IZ + 9i +29| = 4. under the mapping w= 9 (2j/ 4) Z