A building with a rectangular cross-section is 30-m wide and 140-m tall, Assume that 3D flow effects can be neglected and the building can be segmented where each section would have a drag coefficient of 14. 3. Determine the drag (FD), in kN on this building if the incoming wind speed is a typical profile in an urban area. U~y^0,40, such that the wind speed at a height of 100 m is 20 m/s. 4. Determine the drag force (Fp)a in kn if the incoming wind speed is assumed to be uniform and equal to Uove for the profile up to the height of the building,
Answers
The drag force on the building is approximately 14.1 kN assuming a typical urban wind profile.
To determine the drag force on the building, we need to calculate the dynamic pressure (q) and then multiply it by the drag coefficient (Cd) and the reference area (A) of the building.
Given information:
Building width (w) = 30 mBuilding height (h) = 140 mDrag coefficient (Cd) = 14Wind speed at a height of 100 m (U) = 20 m/sFirst, let's calculate the dynamic pressure (q) using the wind speed at a height of 100 m:
q = 0.5 * ρ *\(U^2\)
Here, ρ represents the air density. In an urban area, we can assume the air density to be approximately 1.2 kg/m³.
q = 0.5 * 1.2 * \((20)^2\)
q = 240 N/m²
The reference area (A) of the building is equal to the product of its width and height:
A = w * h
A = 30 m * 140 m
A = 4200 m²
Now we can calculate the drag force (FD) using the formula:
FD = Cd * q * A
FD = 14 * 240 N/m² * 4200 m²
FD = 14 * 240 * 4200 N
FD = 14 * 1,008,000 N
FD = 14,112,000 N
Converting the drag force to kilonewtons (kN):
FD = 14,112,000 N / 1000
FD ≈ 14,112 kN
Therefore, the drag force on the building with a rectangular cross-section, considering the wind speed profile in an urban area, is approximately 14,112 kN.
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Related Questions
Is the pure fission bomb a nuclear bomb?
Answers
Answer:
no, the pure fission bomb is a hydrogen bomb
Answer: a pure fission bomb is not a nuclear
bomb
Explanation: fusion is the combining of hydrogen particles, whereas fission is the splitting of atoms.
Real jets also spread laterally and slow down What would be the effect of a jet with 10% greater area and 10% slower at the vane compared with that which is emerging from the apparatus?
Answers
The effect of a jet with 10% greater area and 10% slower at the vane compared with that which is emerging from the apparatus would be that the jet with 10% greater area will give a stronger force while the jet with 10% slower vane will give a reduced force.
Real jets also spread laterally and slow down.
When the area of a jet is increased,
the mass of the jet increases and this will cause the jet to spread wider and faster,
giving a stronger force compared to the initial jet.
However, in this scenario, the area of the jet is increased by 10% while the speed at which it emerges from the apparatus is reduced by 10%.
When the vane of the jet is slowed down by 10%,
the rate of speed at which the jet emerges is reduced by 10% as well.
This will lead to a reduced force and a smaller impact on the object in front of it.
The effect of the two situations will be counteracted,
but it is important to consider the rate at which the jet is slowed down and the area of the jet to determine the resulting effect of the two situations.
In conclusion, the jet with 10% greater area and 10% slower vane will give a stronger force due to the increased mass of the jet but the reduced speed of the vane will reduce the force given by the jet.
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design process 8 steps with definition
Answers
Answer:
Step 1: Define the Problem.
Step 2: Do Background Research. .
Step 3: Specify Requirements. .
Step 4: Brainstorm, Evaluate and Choose Solution.
Step 5: Develop and Prototype Solution.
Step 6: Test Solution.
Step 7: Does Your Solution Meet the Requirements?
Step 8: Communicate Results.
can u tell me the definition tho?
palled correctly as “though” which is an alternate form of “although”) at the end is informal usage. It's better placed before “she seems better today
The bath tub vortex hown in gure(4) conit of a rotational region (rigid body motion)
up to a radiu of r = 0. 6 meter where the tangential velocity of uid under rotation varie
linearly with radiu and an irrotational region beyond r = 0. 6 meter where the ow velocity
i inverely proportional to radiu. The tangential velocity variation with radiu of vortex i
hown in upper part of gure(4) wherea the prole of free urface of water i hown in the
lower part. Determine the depth of the free urface at origin which i placed at the level of
free urface far from the origin. (10
Answers
The bath tub vortex shown in Figure 4 has a rotational zone that extends up to a radius of r = 0. 6 meters and has a variable tangential velocity of the fluid under rotation.
This page is about the line segment. A bone is a radius; see Bone . In other contexts, the radius of a circle or sphere is any line segment that, in classical geometry, connects the object's center to its perimeter; in more modern usage, it also refers to the length of such line segments. The Latin origin of the term "radius" gives it the meanings "ray" and "the spoke of a chariot wheel." The term radius can be pluralized using radii or the standard English radii. The most common abbreviations and names for the mathematical variable radius are R and r. By extension, the diameter D and the radius R are equal. The phrase could relate to an absence of a center.
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2. A refrigerator has COP of 3. How much work must be supplied to the refrige rator in order to remove 200 J of heat from its interior n? ***************
Answers
66.7 J of work is supplied by the refrigerator in order to remove 200J of heat from its interior. Which is having COP of 3
COP of refrigerator is defined as the ratio of heat removed from the substance (refrigerator) to Work input.
Full form of COP is Coefficient of Performance.
Formula of COP = Heat Removed(Q)/ Work input( W)
we have COP =3
Q= 200J substitute in formula
3=200/w ⇒ w=200/3 ⇒ 67J
Hence 66.7 J of work is supplied by the refrigerator in order to remove 200J of heat from its interior. Which is having COP of 3
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What is the solution to this?
Answers
A gravitational force of 4.93 10-12 N in the positive x-direction is applied by the copper sphere to the steel sphere.
How can you determine the force's direction between two charges?Along the line connecting the centres of the two objects, the force is applied. Coulomb's law has an undesirable effect if the two charges have opposing signs. This indicates that there is an attractive force acting on the particles.
\(F = G * m1 * m2 / r^2\)
\(m = rho * (4/3) * pi * r^3\)
r = 65 mm = 0.065 m
a = 3.7r = 0.241 m
b = 2.1r = 0.137 m
c = 0.6r = 0.039 m
m_copper = rho_copper \(* (4/3) * pi * r^3\)
\(= 8,960 kg/m^3 * (4/3) * pi * (0.065 m)^3\)
= 0.0138 kg
m_steel = rho_steel \(* (4/3) * pi * r^3\)
= \(7,860 kg/m^3 * (4/3) * pi * (0.065 m)^3\)
= 0.0119 kg
F = G m_copper m_steel / \(r^2\)
= \(6.674 × 10^-11 N·(m/kg)^2 * 0.0138 kg * 0.0119 kg / (0.065 m)^2\)
\(= 4.74 × 10^-11 N\)
u = (0.241 - 0.137)i + 0j + 0k
= 0.104i + 0j + 0k
So the gravitational force F can be expressed as:
\(= 4.74 × 10^-11 N\)
\(= 4.74 × 10^-11 N\)
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• Your plants are showing signs of iron deficiency. You check the soil
pH and it is 8.0. What would most likely be the best way to eliminate
the iron deficiency and why?
Answers
If your plants show signs of iron deficiency in them, the best way to eliminate the iron deficiency is by applying a foliar spray and lower the pH.
What is pH?pH is simply an abbreviation for the power of hydrogen ions and it can be defined as a measure of the molar concentration of hydrogen ions in a particular solution.
This ultimately implies that, a pH can be used to measure and specify the acidity, neutrality or basicity (alkalinity) of any chemical solution. On a pH scale, a chemical solution or substance with a pH of 7 is said to be neutral, a chemical solution with a pH below 7 is acidic and it's basic (alkaline) when it's pH is above 7.
In conclusion, we can infer and logically deduce that if your plants show signs of iron deficiency in them, the best way to eliminate the iron deficiency is by applying a foliar spray and lower the pH.
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If a PPE doesn’t fit properly do you keep wearing them
Answers
function makeDoubler() {
function add (x, y) {
return x + y
}
function double (x) {
return add(x, x)
}
return double;
}
How many closures are in the following code?
Answers
In the given code, there are two closures: the `add` function and the `double` function.
A closure is a function that can access its own scope, the scope of the outer function, and the global scope. In this case, both `add` and `double` have access to their own scope, the scope of the `makeDoubler` function, and the global scope.
The `add` function is a closure because it is defined within the `makeDoubler` function, and it can access the variables in the scope of the `makeDoubler` function (though there are no variables in this case) as well as the global scope.
The `double` function is also a closure, as it is defined within the `makeDoubler` function, and it can access the `add` function, which is in the scope of the `makeDoubler` function. Additionally, it can access the global scope.
In summary, there are two closures present in the provided code: the `add` and `double` functions, both of which are defined within the `makeDoubler` function and have access to the outer function's scope and the global scope.
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The steel-frame structural support was a main feature in the development of __________. Group of answer choices
Answers
The steel-frame structural support was a main feature in the development of t the floors, roof, walls and skyscraper.
What structure is aided by a metal frame?Steel frame is known to be a form of a building method that is used along with a skeleton frame that is made up of steel columns and I-beams.
Conclusively, This is often used in the construction of grid to aid the floors, roof and walls of any kind of building. It is also used in the construction of skyscraper.
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A 1020 Cold-Drawn steel shaft is to transmit 20 hp while rotating at 1750 rpm. Calculate the transmitted torque in lbs. in. Ignore the effect of friction.If the shaft in Q2 was made of ASTM 30 cast iron, what would be the factor of safety
Answers
Answer:
Question 1 A 1020 Cold-Drawn steel shaft is to transmit 20 hp while rotating at 1750 rpm. Calculate the transmitted torque in lbs. in. Ignore the effect of friction. Answer with three decimal points. 60.024 Question 2 Based on the maximum-shear-stress theory, determine the minimum diameter in inches for the shaft in Q1 to provide a safety factor of 3. Assume Sy = 57 Kpsi. Answer with three decimal points. 0.728 Question 3 If the shaft in Q2 was made of ASTM 30 cast iron, what would be the factor of safety? Assume Sut = 31 Kpsi, Suc = 109 Kpsi 0 2.1 O 2.0 O 2.5 0 2.4 2.3 O 2.2
Explanation:
hope it helps
The thrust angle is checked by referencing
oa. rear toe
ob. front toe
oc. vehicle centerline
od. caster
Answers
In Engineering, the thrust angle is checked by referencing: C. vehicle centerline.
What is a thrust angle?A thrust angle can be defined as an imaginary line which is drawn perpendicularly from the centerline of the rear axle of a vehicle, down the centerline.
This ultimately implies that, the thrust angle is a reference to the centerline (wheelbase) of a vehicle, and it confirms that the two wheels on both sides are properly angled within specification.
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at what point should the timing begin for the first leg outbound in a nonstandard holding pattern?
Answers
The timing for the first leg outbound in a nonstandard holding pattern should begin at the time of the initial clearance.
Which is when the ATC controller grants permission for the aircraft to depart and enter the airspace for the holding pattern. This clearance will also include the altitude, heading, speed, and other instructions needed to enter the pattern. The aircraft should enter the pattern at the designated time, or as soon as possible depending on the operating environment. Once the aircraft is in the pattern, the time for the next leg will be determined by the controller. The aircraft should then continue to follow the instructions from ATC to maintain the desired spacing and separation in the pattern.
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The larger the displacement of an engine, the less power it produces true or false
Answers
Answer: False
Explanation:
For a heap node with an index of 3 and a parent index of 1, identify the child node indices.
2. Identify the new array created after the add operation to create a max-heap.
47 25 36 60 54
Answers
For a heap node with an index of 3 and a parent index of 1, the child node indices can be calculated using the following formula:
Left Child Index = (2 * Parent Index) + 1
Right Child Index = (2 * Parent Index) + 2
Using these formulas, we can find the child node indices for the given parent index:
Left Child Index = (2 * 1) + 1 = 3
Right Child Index = (2 * 1) + 2 = 4
Therefore, the child node indices for the given parent index of 1 are 3 and 4.
As for the new array created after the add operation to create a max-heap, the given array is: 47 25 36 60 54.
To create a max-heap, we need to ensure that every parent node is greater than or equal to its child nodes. If the add operation involves adding a new element to the heap, we would need to perform the necessary adjustments to maintain the max-heap property.
IMPACT OF TRANSPORTATION INNOVATION ON SHAPING PATTERNS OF SETTLEMENT TO ECONOMIC DEVELOPMENT
Answers
The impact of transportation innovation on shaping patterns of settlement to economic development is that it is one that encourages relocation as well as leads to both internal and external trade, efficient use of natural resources and others.
How does improving transportation leads to economic development?Market competition is increased by a transportation network. Resource allocation, or the utilization of particular products and services, is a topic economists frequently research. The allocation process is enhanced by a transportation system because it gives suppliers and consumers more opportunities.
Note that Access to additional markets is facilitated by better transportation infrastructure, and since efficient transportation is less expensive, it is also used more frequently.
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help protect the lower legs and feet from heat hazards like molten metal and welding sparks
Answers
Answer:
i think its called leggings thats wut my shop teacher told me
Explanation:
Two stepped bar is supported at both ends.At the join point of two segments,the force F is applied(downwards).Calculate reactive forces R1 and R3 at the supports.What is value of absolute maximal stress?
Choose one answer nearest your result.
given= d1=10mm d2=20mm L1=20mm L2=10mm E=200GPa F=20kN
Answers
Answer:
F=200kN
Explanation:
which type of duration estimating technique is best if you have a quantitative data to work with, such as square footage?
Answers
In the context of project management, if you have quantitative data such as square footage, the parametric estimating technique is best suited for duration estimation.
Which duration estimating technique is best suited for quantitative data such as square footage?In the context of project management, if you have quantitative data such as square footage, the parametric estimating technique is best suited for duration estimation.
Parametric estimating involves using historical data or statistical relationships to determine the duration of a task or project. By analyzing past projects or available data, you can establish a relationship between the square footage and the time required for completion.
This allows for more accurate and reliable estimates based on measurable parameters. Parametric estimating provides a systematic approach that leverages existing data to make predictions, making it a suitable technique when dealing with quantitative information.
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2. Describe one example of something that might be a need for you but a want for
someone else.
Answers
Answer:
1: water food or shelter
PLEASE HURRY!!!!
Which of the following can be inferred about Bill in the following scenario?
Bill has graduated and obtained a job as a geographer. He develops environmental models to analyze soil and water issues for a chemical company.
A) Bill studied environmental geography.
B) Bill earned a bachelor’s degree.
C) Bill earned a graduate degree.
D) Bill earned a certification in GIS technology.
Answers
Before making a left or right turn, you should signal for at least
Answers
It is okay to lift one end of the vehicle:
A) As long as two swing arms are being used
B) As long as the wheels have been chocked
C) As long as the swing arm restraints are engaged
D) None of the above
Answers
It is okay to lift one end of the vehicle B) As long as the wheels have been chocked.
What is a Safety Procedure?This refers to the processes that are undertaken in order to undertake a task safely, both for the person executing the task and others around.
Hence, we can see that It is okay to lift one end of the vehicle B) As long as the wheels have been chocked
This is because it would enable the vehicle to be safely positioned so the wheels would not roll off and cause an accident.
This safety procedure allows a person to raise one end of a vehicle, if the wheels have been chocked, to keep them in place.
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Which vegetation type do you think will cause fire to spread the fastest?
Explain why you chose that answer.
Answers
Answer:B
Explanation: Dead Grass more flammable than wood and Green grass contains water.
long, cylindrical, electrical heating element of diameter d = 2 mm generates heat at a rate of 200 W/cm?. Determine the heat flux at the surface of the heating element in steady operation.
Answers
To determine the heat flux at the surface of the heating element, we need to calculate the surface area of the element and divide the heat rate by that area.
Given:
Diameter (d) = 2 mm = 0.2 cm
Heat rate (Q) = 200 W/cm²
The radius of the heating element (r) is half the diameter, so r = 0.1 cm.
The surface area of a cylindrical shape is given by:
Surface Area = 2πrL
Since the element is long, we assume the length (L) is large enough to be considered infinite for practical purposes.
Surface Area = 2πrL ≈ 2πr
Substituting the values, we have:
Surface Area = 2π(0.1) = 0.2π cm²
Now, we can calculate the heat flux (q) using the formula:
Heat Flux = Heat rate / Surface Area
Heat Flux = 200 W/cm² / 0.2π cm² ≈ 318.31 W/cm²
Therefore, the heat flux at the surface of the heating element is approximately 318.31 W/cm².
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Problem 12: A 16-in × 20-in concrete column (Fig. 7) is subjected to the following loads: PD( Dead )=300kips( concentric) PL (Live) =180 kips (with an eccentricity of 4 -in) Per ACl318, the required axial force (kips) and moment (k−in) for the design of the column are nearly: rig. 1 - rucuteri 12 650;1150 650;1440 480;720 700;860
Answers
The correct option is 650; 1150. he required axial force and moment are 650 kips and 1150 k-in, respectively.
In order to determine the required axial force and moment for the design of a column, we need to consider the loads that it will be subjected to. The loads acting on the column are as follows:
PD(Dead) = 300 kips (concentric)
PL(Live) = 180 kips (with an eccentricity of 4 in)
Now, we can use the formula for the combined load to find the total load acting on the column:
P = PD + PL
where P is the total load acting on the column, PD is the dead load, and PL is the live load. Substituting the given values, we get:
P = 300 + 180= 480 kips.
The eccentricity of the live load is given as 4 in. Hence, the moment caused by the live load is:
M = PL × e= 180 × 4= 720 k-in.
The axial force and moment required for the design of the column are given by the equations:
N = P + f’c AgN and M values can be calculated using the following options:650; 1150, 650; 1440, 480; 720, 700; 860
Therefore, the required axial force and moment are 650 kips and 1150 k-in, respectively.
Hence, the correct option is 650; 1150.
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Consider the flow of mercury (a liquid metal) in a tube. How will the hydrodynamic and thermal entry lengths compare if the flow is laminar
Answers
Answer:
Explanation:
Considering the flow of mercury in a tube:
When it comes to laminar flow of mercury, the thermal entry length is quite smaller than the hydrodynamic entry length.
Also, the hydrodynamic and thermal entry lengths which is given as DLhRe05.0= for the case of laminar flow. It should be noted however, that Pr << 1 for liquid metals, and thus making the thermal entry length is smaller than the hydrodynamic entry length in laminar flow, like I'd stated in the previous paragraph
Which instruments are very reliable for static and stable conditions?
Answers
An ideal neon sign transformer provides 9130 V at 51.0 mA with an input voltage of 240 V. Calculate the transformer's input power and current.
Answers
Answer:
Input power = 465.63 W
current = 1.94 A
Explanation:
we have the following data to answer this question
V = 9130
i = 0.051
the input power = VI
I = 51.0 mA = 0.051
= 9130 * 0.051
= 465.63 watts
the current = 465.63/240
= 1.94A
therefore the input power is 465.63 wwatts
while the current is 1.94A
the input power is the same thing as the output power.
To loosen a frozen valve, a force F of magnitude 100 lb is applied to the handle of the valve. Knowing that θ = 25° and the moments about the coordinate axes are Mx = −61 lb⋅ft and Mz = −43 lb⋅ft, determine Φ and d.
Answers
Valve freezing is mostly caused by pressure drops in the gas passing through them.
What is Frozen valve?According to the "Joule-Thomson Effect," the gas's temperature decreases by 6 to 8 degrees (F) for every 100 psi reduced across a valve.
Every gas contains a small amount of moisture. This implies that you should be mindful of the possibility of freezing whenever your procedure involves considerable pressure decreases.
When the outside temperature falls below 32 degrees Fahrenheit, valve insulation jackets, which don't offer much protection to the valve internals, and even steam, which has the unintended consequence of hastening the deterioration of the valve's seats and seals.
Therefore, Valve freezing is mostly caused by pressure drops in the gas passing through them.
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