From what my research concluded, true
Za answa iz:
True
Twust meh
rank the following gases in order of decreasing rate of effusion. rank from the highest to lowest effusion rate. to rank items as equivalent, overlap them.
It means that the gas with the lowest molecular weight will have the highest effusion rate.
What has the highest rate of effusion?The given gases' effusion rates are listed in order from highest to lowest. The effusion rate of a hydrogen molecule is the highest, whereas that of a hydrocarbon is the lowest.
A gas will effuse faster when it is lighter and more slowly when it is heavier. Helium (He) will have the highest rate of effusion since it has the lowest molecular weight (atomic weight, in this example).
The following equation can be used to compare the rate of effusion for two gases: The effusion rates in this case are inversely related to the square root of the gas molecules' masses. A container contains an amalgam of neon and argon gas.
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Your boss is given a new cylindrical aluminum part to be sand cast. The part is a
disk 50 cm in diameter and 20 cm thick to be cast of pure aluminum in a closed
mold system containing a gating system and riser volume that is 50% of the mold
cavity volume. Assume that a superheat of 100°C is used and that the aluminum
properties are as follows:
▪ Melting temperature of aluminum = 660°C
▪ Latent heat of fusion = 389.3 J/g density
▪ Density = 2.70 g/cm3
▪ Specific heat = 0.88 J/g-°C. Assume the specific heat has the same value for
solid and molten aluminum.
Q1:Compute the amount of heat (in MJ) that must be added to the metal to heat it to the pouring temperature, starting from a room temperature of 25°C.
Q2: Assume the same part in Q2 is being made with the same method. Based upon past experience when poured from the same temperature, the mold constant for sand casting an aluminum part was found to be 5 min/cm2. Determine the total solidification time (in minutes) for the part.
Q3:Assume that the sand mold downsprue is 25 cm long and the cross-sectional area at the base is 2.5 cm2. The downsprue feeds a horizontal runner leading into a mold cavity. Assume also that the part has the same dimensions as described in Question 22 and that the volumetric contraction for the cast metal in the mold is 4.3%. Finally, assume that using the current superheat, it takes 28 seconds before solidification begins. What is the mold fill time (in seconds)?
Q4: Will the mold fill before the start of freezing?
Q5: Assume that a part with unknown dimensions uses a permanent mold casting process with a mold constant of 1 min/cm2 and that the part solidifies in 60 min. Calculate the dimensions (in cm) of an effective riser assuming that the riser is a cylinder with a height/diameter ratio H/D = 1 and that the riser will take 10% longer than the casting to solidify. H = D = ?
Can someone help with this please?
Answer:
with what
Explanation:
Explain the answer of you choose?
Note that dosage of coagulants is based on viscosity of water. (Option D)
What is the explanation for the above response?The dosage of coagulants that is administered must always be based on various factors. Some of them are:
The type of coagulantThe concentration of coagulantthe level of organic matter and the tubidity of water etc.Note that temperature may also affect the dosage because if the water is cold or the lower the temperature, the higher the dosage required.
Thus, it is correct to state that that dosage of coagulants is based on viscosity of water. (Option D)
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Let X and Y be independent Bernoulli variables such that P(X = 1) = p, P(Y = 1) = q for some 0 ≤ p, q ≤ 1. Find P(X ⊕2 Y = 1)
Answer:
dddddddddddddddddddddddddddddddddddddd
Explanation:
Which of the following background-attachment properties is similar to scroll, but is used for elements, such as scroll boxes, to allow the element background to scroll along with the content within a box? a) fixed b) local c) round d) space
The background-attachment property that is similar to scroll, but is used for elements, such as scroll boxes, to allow the element background to scroll along with the content within a box is 'local.'
The background-attachment property sets whether a background image is fixed or scrolls along with the containing element's text. The background-attachment property sets how the background image will be positioned in the viewport.The background-attachment property has four values, which are:scroll: The image will move as the user scrolls the element, and it will scroll along with the textfixed: The image will not move when the user scrolls the element; instead, it will remain fixed in place, just like a background image in a picture frame. The fixed value fixes the image in a specific location of the page, regardless of the scrolling of the rest of the page.
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Correctly complete the statement below with the appropriate term.
As engineers sketch, they take periodic (_____) to verify that the design maintains the appropriate ratio for the given scale.
Engineers take periodic site measurements to verify the scale conveys true information
Site Measurements
measureants is the amount or extent of something ascertained through use of calibrated instrument called measuring instrument. When measurements are done on site it is called site measurements.
Engineers use the site measurements to scale their sketches hence to ensure the scale is always correct periodic measurements should be taken.
On-site measurements value and sketch measurement value gives the scale which is the ratio, should be maintained always
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When someone presses SEND on a cellular phone, the phone attempts to set up a call by transmitting a SETUP message to a nearby base station. The phone waits for a response, and if none arrives within 0.5 seconds it tries again. If it doesn't get a response after n=6 tries, the phone stops transmitting messages and generates a busy signal.(a) Draw a tree diagram that describes the call setup procedure.(b) If all transmissions are independent and the probability is p that a SETUP message will get through, what is the PMF of K, the number of messages transmitted in a call attempt?(c) What is the probability that the phone will generate a busy signal?(d) As manager of a cellular phone system, you want the probability of a busy signal to be less than 0.02. If p=0.9, what is the minimum value of n necessary to achieve your goal?
(a) Prob. of a successful call setup is product of prob. of success for each transmission.
(b) The PMF of K, the number of messages transmitted in a call attempt, is:\(P(K=k) = (n choose k) * p^k * (1-p)^(n-k).\)
(c) The probability that the phone will generate a busy signal is: P(busy signal) = \((1-p)^6.\)
(d) To find the minimum value of n necessary probabilty ,we can use the formula:\(n > log(0.02) / log(1-p)\). Plugging in p=0.9 and solving, we get:
\(n > log(0.02) / log(0.1) ≈ 10.1\)
(a) How can we calculate the probability of successfully transmitting a SETUP message ?The diagram represents the process of setting up a cellular phone call, where a SETUP message is transmitted to a nearby base station and the phone waits for a response.
Each transmission attempt has an independent probability of success of p. If a response is not received within 0.5 seconds, the phone tries again up to a maximum of n=6 times.
If no response is received after the sixth attempt, the phone generates a busy signal.
The diagram shows a successful transmission and response after each SETUP message in the top six branches, and a busy signal after the sixth attempt in the bottom branch.
Tree Diagram:
Tree diagram:
-----> SUCCESS (probability p)
/ |
SETUP -----> SUCCESS (probability p)
\ |
-----> SUCCESS (probability p)
/ |
SETUP -----> SUCCESS (probability p)
\ |
-----> SUCCESS (probability p)
/ |
SETUP -----> SUCCESS (probability p)
\ |
-----> SUCCESS (probability p)
/ |
SETUP -----> SUCCESS (probability p)
\ |
-----> SUCCESS (probability p)
/ |
SETUP -----> SUCCESS (probability p)
\ |
-----> BUSY SIGNAL (probability 1-p)^6
(b) How is the PMF of K, the number of messages transmitted in a call attempt ?The PMF (Probability Mass Function) of K, which represents the number of messages transmitted in a call attempt, is described by the binomial distribution. In this case, the total number of trials is \(n=6\), which corresponds to the maximum number of attempts the phone makes to transmit the SETUP message.
The probability of success for each transmission attempt is denoted by p, which is the probability that a SETUP message will get through.
The PMF \(P(K=k)\)gives the probability of having exactly k successful transmissions in a single call setup attempt, where k can take any value from 0 to 6.
The formula for\(P(K=k)\) is given by the binomial distribution, which is the product of three factors: the number of ways to choose k successful transmission attempts out of n total attempts, the probability of success raised to the power of k, and the probability of failure\((1-p)\) raised to the power of n-k (which is the number of failed transmission attempts).
The binomial distribution allows us to calculate the probability of obtaining any number of successful transmission attempts in a single call setup attempt.
(c) How is the probability of the phone generating a busy signal calculated ?The probability that the phone will generate a busy signal is the probability that none of the 6 SETUP messages transmitted receive a response, which is represented by the probability of a SETUP message failing to get through, or \((1-p)\).
Since each SETUP message is transmitted independently, the probability of all 6 messages failing to get through is the product of the individual probabilities, which is \((1-p)^6\).
Therefore, this formula gives the probability that the phone will generate a busy signal.
(d) How do we find the minimum value of n necessary to achieve a probability of a busy signal less than 0.02?The explanation describes the process to determine the minimum number of trials, denoted by n, required to achieve a probability of a busy signal less than 0.02.
The probability of a busy signal is calculated by finding the probability that all 6 SETUP messages fail to get through, which is\((1-p)^6\). This inequality is then set to be less than 0.02.
By taking the logarithm of both sides, the inequality is simplified to a linear form. Solving for n, we plug in p=0.9 and use logarithmic properties to find that\(n > log(0.02) / log(0.1) ≈ 10.1.\)
Therefore, we conclude that the minimum value of n necessary to achieve a probability of a busy signal less than 0.02 is n=11.
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A 4-pole, 3-phase induction motor operates from a supply whose frequency is 60 Hz. calculate: 1- the speed at which the magnetic field of the stator is rotating. 2- the speed of the rotor when the slip is 0.05. 3- the frequency of the rotor currents when the slip is 0.04. 4- the frequency of the rotor currents at standstill.
Answer:
The answer is below
Explanation:
1) The synchronous speed of an induction motor is the speed of the magnetic field of the stator. It is given by:
\(n_s=\frac{120f_s}{p}\\ Where\ p\ is \ the \ number\ of\ machine\ pole, f_s\ is\ the\ supply \ frequency\\and\ n_s\ is \ the \ synchronous\ speed(speed \ of\ stator\ magnetic \ field)\\Given: f_s=60\ Hz, p=4. Therefore\\\\n_s=\frac{120*60}{4}=1800\ rpm\)
2) The speed of the rotor is the motor speed. The slip is given by:
\(Slip=\frac{n_s-n_m}{n_s}. \\ n_m\ is\ the \ motor\ speed(rotor\ speed)\\Slip = 0.05, n_s= 1800\ rpm\\ \\0.05=\frac{1800-n_m}{1800}\\\\ 1800-n_m=90\\\\n_m=1800-90=1710\ rpm\)
3) The frequency of the rotor is given as:
\(f_r=slip*f_s\\f_r=0.04*60=2.4\ Hz\)
4) At standstill, the speed of the motor is 0, therefore the slip is 1.
The frequency of the rotor is given as:
\(f_r=slip*f_s\\f_r=1*60=60\ Hz\)
Assignment 1."Value chain analysis is not a very difficult exercise conceptually"Clarify 2.Supply Chain Management drives supply chain members to have a customer orientation, Explain 3.A typical supply chain may involve a variety of
A typical supply chain may involve a variety of stages such as:
(i) Customers.
(ii) Retailers.
(iii) Wholesalers/Distributors.
What is a supply chain?A supply chain is a group of people and businesses involved in producing and distributing goods to customers.
The supply chain is the network of all the people, businesses, resources, tasks, and technological advancements involved in the production and distribution of a good. An entire supply chain, from the delivery of raw materials from the supplier to the manufacturer to the final delivery to the customer, is included.
Therefore, the typical supply chain may involve a variety of stages such as Customers, Retailers and Wholesalers.
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write a news paper about environmental event.
The world is facing an environmental crisis. Pollution, climate change, and habitat destruction are just some of the problems we face. But there is hope. Environmental groups are working to raise awareness and protect our planet. This event will focus on one such group, the Sierra Club. Founded in 1892, the Sierra Club is America's oldest and largest environmental organization. They have been at the forefront of many important environmental campaigns, including protecting wilderness areas and fighting for clean air and water standards. Today, they continue to work towards a sustainable future for all of us.
Something i did for my class, you can change it up. Hope it helps.
?Why the efficiency of Class A amplifier is very poor
Installation a2 An insulated rigid tank initially contains 1.4-kg saturated liquid
water and water vapor at 200°C. At this state, 25 percent of the
volume is occupied by liquid water and the rest by vapor. Now an
electric resistor placed in the tank is turned on, and the tank is
observed to contain saturated water vapor after 20 min. Determine
(a) the volume of the tank, (b) the final temperature, and (c) the
electric power rating of the resistor
nd demo of reaper in Mahindra Yuvo 575 DI tractor
Answer:
Explanation:
It appears that you are trying to solve a problem involving an insulated rigid tank containing saturated liquid water and water vapor. To determine the volume of the tank, you will need to know the mass of the liquid water and the mass of the water vapor. The mass of the liquid water can be calculated by multiplying the mass of the water and vapor mixture by the fraction of the mixture that is liquid water (1.4 kg * 0.25 = 0.35 kg). The mass of the water vapor can be calculated by subtracting the mass of the liquid water from the total mass of the mixture (1.4 kg - 0.35 kg = 1.05 kg).
To determine the final temperature of the tank, you will need to know the amount of heat added to the tank by the electric resistor and the specific heat capacity of the water and water vapor mixture. The specific heat capacity is a measure of the amount of heat required to raise the temperature of a substance by a certain amount. The specific heat capacity of water is 4.186 J/g°C, and the specific heat capacity of water vapor is 2.080 J/g°C.
To determine the electric power rating of the resistor, you will need to know the amount of heat added to the tank by the resistor and the time over which the heat was added. The power rating of the resistor is equal to the amount of heat added to the tank divided by the time over which the heat was added.
I hope this helps clarify the problem and provide some guidance on how to solve it. If you have any further questions or need additional help, please don't hesitate to ask.
will give brainliest what are 3 good projects to do with wood or cardboard or paper or an old drone when you are a beginner
if you do not have 3 good projects then please dont answer and just comment them but if you have more than 3 that would be great for you to answer.
Answer:the inflating Ballon expirement
Explanation:
what are the two main varieties of authentication algorithms
The two main varieties of authentication algorithms are symmetric-key algorithms and asymmetric-key algorithms.
1. Symmetric-key algorithms: In this method, both the sender and receiver use the same secret key to encrypt and decrypt messages. The primary advantage of symmetric-key algorithms is their speed and efficiency, making them suitable for handling large amounts of data. However, the key distribution process can be challenging, as securely sharing the secret key between parties is crucial. Examples of symmetric-key algorithms include Advanced Encryption Standard (AES) and Data Encryption Standard (DES).
2. Asymmetric-key algorithms: Also known as public-key cryptography, this method involves the use of a pair of keys - a public key and a private key. The public key is openly shared, while the private key remains confidential. A message encrypted with the recipient's public key can only be decrypted by their corresponding private key. Asymmetric-key algorithms offer a more secure approach to key distribution, but they are computationally intensive and slower than symmetric-key algorithms. Examples include RSA and Elliptic Curve Cryptography (ECC).
In summary, symmetric-key algorithms are faster and more efficient, but key distribution can be challenging. Asymmetric-key algorithms offer a more secure approach to key distribution but are computationally intensive and slower in comparison. Both methods serve as the foundation for authentication algorithms in modern cryptographic systems.
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Is (3x+1)(4x-5) the factor form of 12x^2-11x-5?
Answer:
Yes good job
Explanation:
Answer:
Yes
Explanation:
Yes, the factored form of 12x^2-11x-5 is (3x+1)(4x-5)
T/F: A surface grinder can typically produce a surface flat within plus or minus .0001.
True. A surface grinder is a precision grinding machine that is capable of producing a surface flat within plus or minus .0001. It uses a rotating grinding wheel to grind and remove material from a workpiece, resulting in a smooth and flat surface finish.
A surface grinder can typically produce a surface flat within plus or minus 0.0001 inches. This precision is achieved by using a grinding wheel to remove material from a workpiece, resulting in a flat and smooth surface.
An extensively utilised abrasive machining technique removes metallic or nonmetallic material chips from a workpiece to flatten or smoothen its surface using a spinning wheel coated in rough particles (grinding wheel).
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when creating inside corners on milled and turned parts, chamfered and sharp edges are preferred over fillet radii.
True or False
Rather of using fillet radii, chamfered and sharp edges are preferred when constructing inside corners on milled and turned items. Cutting speed and tool life have a linear connection when determining useful tool life.
What does chamfered mean in terms of edges?
The sloped or angled edges or corners of a part design are known as chamfers. It is the fillet's opposite. A chamfer is sharply angled and straight, as opposed to being curved. Mechanical engineering and manufacturing both frequently use this phrase. The middle French word chamfrein, which is related to the bevelled edge, is where the word chamfer originated. To put it in much simpler terms, a bevel is an edge that is sloped, and a chamfer is an edge that is a bevelled edge that joins two surfaces. This includes creating an angled cut along the edge of a piece of material. The word "bevel" has been applied there as an adjective.
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Ans. 18).
A push of 180 N and pull of 350 N act simultaneously at a point. Find the resultant of the
forces. if the angle between them (135)
Explanation:
R = √(A²+B²–2ABCos(x°))
x⁰ = 180–135
x° = 45°
R = √(350²+180²–2(350(180))Cos(45)))
R = 256.524
A closed thermodynamic cycle consists of two isobaric and two isochoric processes. The processes operate between 0.43 MPa and 4.3 MPa and 0.28 m3 and 2.9 m3. Determine the total work (with appropriate sign) for one complete cycle, when the cycle operates in the clockwise direction. Provide your result in MJ.
Answer:
Explanation:
For first isobaric process (expansion with constant pressure):
\(W_{1}=P_{1}(V_{2}-V_{1})=(0.43\times 10^{6})(2.9-0.28)=1.1266 \times 10^{6} J=1.1266 MJ(+) (Expansion)\)
Now, for the first isochoric: \(W_{2}=0\), and \(Q_{2}=\Delta U=U_{3}-U_{2}\)
For the second isobaric process (compression with constant pressure):
\(W_{3}=P_{2}(V_{1}-V_{2})=(4.3\times 10^{6})(0.28-2.9) =-11.266\times 10^{6}J=-11.266 MJ (Compression)\)
For the last isochoric: \(W_{4}=0, Q_{4}=\Delta U=U_{4}-U_{3}\)
So, the total work per cycle: \(W=W_{1}+W_{2}+W_{3}+W_{4}=1.1266+0-11.266+0=-10.1394 MJ\)
Determine the capitalized cost of a permanent roadside historical marker that has a first cost of $90,000 and a maintenance cost of $3,100 once every 5 years. Use an interest rate of 10% per year.
The capitalized cost is:
The capitalized cost of the permanent roadside historical marker is $116,386.30.
Capitalized cost
The capitalized cost is an assessment of the cost of the investment. Capitalized cost is a useful metric in cost accounting, particularly in the case of business assets. In the case of permanent roadside historical markers, we need to calculate the capitalized cost given the first cost and maintenance cost of $90,000 and $3,100 respectively that is done every 5 years.
Assuming the interest rate of 10% per year. We can use the following formula to calculate the capitalized cost.
C = P * (i / (1 - (1 + i)^(-n)))
Where,
C = Capitalized cost
P = First cost
i = Interest rate per year
n = Total number of years
To calculate the capitalized cost of the permanent roadside historical marker, we need to calculate the present value of the investment. We are given that the first cost of the historical marker is $90,000 and the maintenance cost of $3,100 is incurred once every 5 years at an interest rate of 10% per year.
The total number of years n = 20 years (4 maintenance cycles of 5 years each).
Therefore, using the formula, we have,
C = $90,000 + $3,100 * (PVIFA10%,20)
$3,100 * (PVIFA10%,20) = 8.513 (calculated using Excel or tables)
C = $90,000 + $3,100 * 8.513
C = $90,000 + $26,386.30 = $116,386.30.
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Technician A says that angle spring pull-type clutches are adjusted by turning the large adjustment ring in the
clutch cover. Technician B says that the adjustment will change the clutch brake squeeze dimension. Who is
correct?
correct Tech A or tech B
which option identifies the AFNR pathway in the following scenarios? Jalal works for a prestigious golf course that hosts an annual PGA Tour event. His employers depend on him to use cutting-edge science and technology to prepare the course and maintain it with the utmost care.
A. Agricultural System
B. Plant System
C. Biotechnology System
D. Natural Resource System
Answer: C. Biotechnology system
Explanation:
Suppose that the following eight jobs must be scheduled through a car repair facility (repair times are shown in days): Car Repair (Processing) Time Due Date A 3 11 B 10 9 C 7 10 D 12 8 E 4 17 F 15 35 G 8 13 H 9 23 Use the information in the above table to answer these questions (you may use a s/heet if you wish): What car is repaired the latest (the most past its due date) if an SPT ( shortest processing time) sequence is to be obeyed? What car is repaired the latest (the most past its due date ) if an EDD (earliest due date) scheduling sequence is to be obeyed?
Answer:
The answer is "F".
Hope this helped!
A saw produces 100 decibels of sound. If a worker is wearing hearing protection with an NNR rating of 30, then the worker should only hear __________ decibels of sound
the worker wearing the hearing protection with an NNR rating of 30 should only hear 70 decibels of sound. The hearing protection reduces the sound level by 30 decibels, providing a safer and more comfortable auditory environment for the worker.
When a worker is wearing hearing protection with a Noise Reduction Rating (NNR) of 30, the NNR represents the amount of noise reduction provided by the hearing protection device. To calculate the effective decibel level the worker will hear, the NNR is subtracted from the original sound level.In this case, the saw produces 100 decibels of sound, and the NNR of the hearing protection is 30. To calculate the effective decibel level, we subtract the NNR from the original sound level:Effective Decibel Level = Original Sound Level - NNR Effective Decibel Level = 100 dB - 30 dB = 70 dB.
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This part of the proposal begins with a capsule statement and then proceeds to introduce the subject to a stranger
Answer:
nsnsndndnndndndnhhhh
branch-circuit conductors shall have an ampacity ? the maximum load they are intended to serve.
Branch-circuit conductors shall have an ampacity that is sufficient to safely carry the maximum load they are intended to serve. The ampacity of branch-circuit conductors is determined based on the anticipated current demands of the connected loads.
The National Electrical Code (NEC) provides guidelines and ampacity tables that help determine the minimum required ampacity for branch-circuit conductors based on the type of conductor, insulation rating, and the maximum allowable temperature rise.
It is important to correctly size the branch-circuit conductors to ensure they can handle the expected load without exceeding their ampacity. Undersized conductors can result in overheating, voltage drop, and potential hazards. Oversized conductors may not be cost-effective and can take up unnecessary space.
To determine the appropriate ampacity for branch-circuit conductors, factors such as the type and number of connected devices, continuous loads, and future expansion should be considered. It is recommended to consult the NEC or a qualified electrical professional to ensure compliance with the specific requirements and calculations for ampacity determination.
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Multiple Choice
Which of the following analogies best describes the relationship between urban planning and zoning?
Zoning is like a hammer because it is used as a tool for urban planning.
Zoning is like a butterfly because it is the final form of urban planning.
Zoning is like a stop sign because it is an obstacle to urban planning.
Zoning is like an egg because it is the process from which urban planning emerges.
Answer:
Zoning is like a hammer because it is used as a tool for urban planning.
Pls answer and I will give a like!
Answer:
a
Explanation:
Sketch a stone bridge, a steel bridge, a wood bridge, and a reinforced concrete bridge. Describe how their shape is related to the properties of the material.
The shape of a bridge is determined by the material it's made of. Bridges are made from different materials such as wood, steel, stone, and reinforced concrete.
Stone bridge: A stone bridge is built from stone blocks or stones that are cut and fitted together. The shape of a stone bridge is typically arched or curved. This is because stone is a very heavy and dense material that can withstand a lot of pressure. The arched shape of the stone bridge helps distribute the weight of the bridge evenly across the supporting pillars.
Steel bridge: A steel bridge is made from steel beams or trusses. The shape of a steel bridge is typically angular and geometric. This is because steel is a very strong material that can be easily molded and shaped into different shapes. The angular shape of the steel bridge helps distribute the weight of the bridge evenly across the supporting pillars. The shape also helps provide stability and prevent the bridge from swaying or moving in high winds.
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