A delta 3-phase equilateral transmission line has a total corona losses of 53,000W at 106,000V and a power loss of 98,000W at 110,900 KV.
Determine:
a. The disruptive critical voltage between the lines.
b. Corona losses at 113KV.
Answers
The disruptive critical voltage between the lines in a delta 3-phase equilateral transmission line can be determined using the ratio of corona losses and the power loss.
In this case, the total corona losses are given as 53,000W at 106,000V and the power loss is 98,000W at 110,900KV. By taking the ratio of the corona losses to the power loss, we can find the ratio of voltage to the power loss. Multiplying this ratio by the given power loss at 110,900KV, we can calculate the disruptive critical voltage. To find the corona losses at 113KV, we can again use the ratio of corona losses to the power loss. By multiplying this ratio by the power loss at 113KV, we can determine the corona losses at that voltage.
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Related Questions
A pumping test was made in pervious gravels and sands extending to a depth of 50 ft. ,where a bed of clay was encountered. The normal ground water level was at the ground surface. Observation wells were located at distances of 10 and 25 ft. from the pumping well. At a discharge of 761 ft3 per minute from the pumping well, a steady state was attained in about 24 hr. The draw-down at a distance of 10 ft. was 5.5 ft. and at 25 ft. was 1.21 ft. Compute the hydraulic conductivity in ft. /sec.
Answers
Answer:per minute from the pumping well, a steady state was attained in about 24 hr. The draw-down at a distance of 10 ft. was 5.5 ft. and at 25 ft. was 1.21 ft.
Explanation:
10. The crank AB is rotating in the clockwise direction with a constant angular velocity of 2000RPM. What is the velocity of the piston C at the instant shown? 50mm A -175mm 50mm
Answers
To determine the velocity of piston C, we need to use the concept of instantaneous center of zero velocity.
At the instant shown, point B is the instantaneous center of zero velocity for the connecting rod BC. Therefore, the velocity of point C is perpendicular to line BC and passes through point B.
Let's draw a diagram to better visualize the problem:
A (50mm)
o
\
\
\
o B (-175mm)
\
\
\
o C (50mm)
From the given information, we know that the angular velocity of crank AB is 2000 RPM. Let's convert this to radians per second:
2000 RPM * (2π radians/revolution) * (1/60 seconds/minute) = 209.44 radians/second
The velocity of point B is equal to the velocity of point A, which is perpendicular to line AB and passes through point A. The velocity of point A can be calculated as:
VA = ω * rA
where ω is the angular velocity in radians per second and rA is the distance from point A to the center of rotation (which is point O in this case). Since rA = 50mm, we have:
VA = 209.44 radians/second * 0.05 meters = 10.47 meters/second
The velocity of point C can be calculated as:
VC = VB + BC
where VB is the velocity of point B and BC is the velocity of point C relative to point B. Since point B is the instantaneous center of zero velocity, we know that the velocity of point B is zero. Therefore:
VB = 0
To calculate the velocity of point C relative to point B, we can use the formula:
BC = rBC * ωBC
where rBC is the length of the connecting rod BC and ωBC is the angular velocity of BC relative to AB. Let's first calculate the length of BC using the Pythagorean theorem:
BC^2 = AB^2 + AC^2 - 2 * AB * AC * cos(θ)
where θ is the angle between AB and AC. From the diagram, we can see that θ is equal to:
θ = 180° - φ
where φ is the angle between AB and the horizontal axis. Since AB is horizontal, we have:
θ = 180° - (-90°) = 270°
Using the law of cosines, we can calculate the length of BC as:
BC^2 = 175^2 + 50^2 - 2 * 175 * 50 * cos(270°) = 32725
BC = sqrt(32725) = 181.05 mm
To calculate ωBC, we can use the formula:
ωBC = (ωAB * sin(θ)) / sin(φ)
where ωAB is the angular velocity of AB and φ is the angle between AB and the line passing through points A and B. From the diagram, we can see that φ is equal to:
φ = 180° - θ
φ = 180° - 270° = 90°
Therefore:
ωBC = (209.44 radians/second * sin(270°)) / sin(90°) = -209.44 radians/second
(Note that the negative sign indicates that BC is rotating in the opposite direction to AB.)
Now we can calculate the velocity of point C as:
VC = VB + BC = 0 + 181.05 mm * (-209.44 radians/second) = -37.94 meters/second
Therefore, the velocity of piston C at the instant shown is -37
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1.3. If the surface tension coefficient of a fluid is 0,07 N/m and the radius
of the droplet is 2,5 mm. calculate:
1.3.1 surface tension force
(2)
1.3.2 difference in pressure of the droplet
(1)
Answers
Answer:
A) F = 0.011 N
B) ΔP = 5.6 N/m²
Explanation:
We are given;
surface tension coefficient; S = 0.07 N/m
Radius; r = 2.5 mm = 0.025 m
A) Formula to find the surface tension force(F) is given by;
F = SL
Where L is effective length = 2πr
F = 0.07 × 2π × 0.025
F = 0.011 N
B) Formula for difference in pressure droplet is;
ΔP = 2S/r
Thus;
ΔP = (2 × 0.07)/0.025
ΔP = 5.6 N/m²
Question 1 The World Wide Web (WWW) is an information system that does which of the following?
Allows access to resources over the internet.
O Uses URLs to identify websites and documents it stores.
O imposes standard restrictions on the websites it stores.
O All of the answers are correct.
Answers
The World Wide Web (WWW) is an information system that allows access to resources over the internet, uses URLs to identify websites and documents it stores and imposes standard restrictions on the websites it stores.
For what is the World Wide Web famous?Everyone, not just researchers, now has access to the internet thanks to the world wide web. It connected the world in a way that greatly facilitated communication, sharing, and information access. Since then, technology has enabled people to share their ideas and works via blogs, social networking sites, video sharing, and other channels.
By the year 1989, Tim Berners-Lee had created the internet. He was looking for a fresh method for researchers to quickly exchange the results of their tests. Because of the web, this data could be shared across computers that were online.
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Electrical Circuit question..
Answers
Answer:
Cool.
Explanation:
What is anthropology? Discussion the types of anthropology?
Answers
Answer:
Anthropology is the systematic study of humanity, with the goal of understanding our evolutionary origins, our distinctiveness as a species, and the great diversity in our forms of social existence across the world and through time. The focus of Anthropology is on understanding both our shared humanity and diversity, and engaging with diverse ways of being in the world.
Anthropology is divided into three subfields: sociocultural, biological, and archaeology.
Explanation:
Have a great day!
Implement a program that manages shapes. Implement a class named Shape with a method area() which returns the double value 0.0. Implement three derived classes named Rectangle, Square, and Circle. Declare necessary properties in each including getter and setter function and a constructor that sets the values of these properties. Override the area() function in each by calculating the area using the defined properties in that class.Using Java to write a program that repeatedly shows the user a menu to create one of the three main shapes or to print the shapes created so far. If the user selects to create a new shape, the program prompts the user to enter the values for the size of the selected shape. The shape is then stored in an array. If the user selects to print the current shapes, print the name and the total area of each shape to the console.Hint: You may limit the size of the array to 10.
Answers
Answer:
Explanation:
The following code was written in Java. It creates classes for each one of the shapes requested and includes all of their variables and the area method, as well as a toString method. Then in the main method, the menu is created which allows the user to enter the shape that they want and if they decide to exit it will print out every shape within the shapes array. Due to technical reasons I have added the code as a txt file below and in the picture you can see the output.
how to calculate the critical path
Answers
Answer:
Explanation:
The critical path is the longest path through a project network diagram, which includes all the activities that are critical to the completion of the project. In order to calculate the critical path, you will need to follow these steps:
Identify all the activities that need to be completed for the project.
Determine the duration of each activity. This can be estimated based on past experience or expert opinion, or by conducting time studies.
Create a network diagram that shows the sequence of activities and their dependencies. This can be done using software such as Microsoft Project or by drawing a diagram manually.
Identify the earliest start and finish times for each activity, based on the dependencies and durations.
Identify the latest start and finish times for each activity, based on the project deadline.
Calculate the total float or slack for each activity, which is the amount of time that an activity can be delayed without affecting the overall project completion date.
Identify the critical path, which is the longest path through the project network diagram that has zero total float or slack. This means that any delay in one of the activities on the critical path will cause a delay in the overall project completion date.
Once you have identified the critical path, you can focus your attention on managing and monitoring the activities on that path to ensure that the project stays on schedule.
Step 1: Write down the start and end time next to each activity.
The first activity has a start time of 0, and the end time is the duration of the activity.
The next activity’s start time is the end time of the previous activity, and the end time is the start time plus the duration.
Do this for all the activities.
Step 2: Look at the end time of the last activity in the sequence to determine the duration of the entire sequence.
Step 3: The sequence of activities with the longest duration is the critical path.
Using the same example above, here’s what the critical path diagram might look like:
Steps to calculate the critical path manually (infographic)
Once you have the critical path figured out, you can build the actual project schedule around it.
14
ID Control Limit Using Sample
UCL is:
20.7
19.9
21.9
17.6
Answers
The control limit using Sample Upper Control Limit (UCL) is determined to be 20.7 . Control limits are statistical calculations used in process control to determine the boundaries within which a process is considered to be under control.
Control limits are typically calculated based on historical data and the desired level of control for a specific process. They help identify whether the process is operating within acceptable limits or if there are variations that require investigation and corrective action. The UCL represents the upper boundary beyond which the process is considered to be out of control.
By comparing the observed values or sample measurements to the control limits, organizations can monitor and assess the performance of a process. If a data point falls outside the control limits, it may indicate a special cause variation or an issue that needs to be addressed to bring the process back under control.
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How would you describe an intelligent workplace?
Answers
An intelligent workplace boosts employees' activities through fluid workflows and the automation of routine job procedures made possible by the Internet of Things (IoT) and artificial intelligence (AI).
What does Carnegie Mellon University mean by the intelligent workplace?The Intelligent Workplace serves as a test bed for evaluating the effectiveness of new procedures and products because it is a working office, research environment, and instructional setting. The Center's research team worked along with Swiss architect Pierre Zoelly to create the project's design.
What characteristics characterise an intelligent workplace?An intelligent workplace boosts employees' activities through fluid workflows and the automation of routine job procedures made possible by the Internet of Things (IoT) and artificial intelligence (AI).
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An Hvac technician is working on a small office building system has just installed a new scroll compressor.one day later there is a complaint from a tenant that it rattles when it starts up the technician explains that it is normal and does not indicate a problem with the system WHY
Answers
The HVAC technician explains that the rattling noise when the new scroll compressor starts up is normal and does not indicate a problem with the system.
When a new compressor is installed in an HVAC system, it may produce some noise during its initial startup due to the system's mechanical parts settling into their new positions. The noise is typically caused by the compressor's internal parts vibrating as they begin to operate together. This is a common occurrence and does not necessarily indicate a problem with the system.
The HVAC technician would have likely performed a thorough check of the system after installing the new compressor and ensured that it was functioning correctly. If there were any issues, they would have addressed them before leaving the site.
It's also possible that the tenant who reported the noise may not be familiar with the normal operation of an HVAC system or may be particularly sensitive to noise. In any case, the technician's explanation that the noise is normal and not indicative of a problem should alleviate any concerns the tenant may have had.
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which of the following is not an acceptable means of making a steel column fire resistant? group of answer choices apply an intumescent mastic/paint. wrap the column with layers of drywall. encase the column in concrete. use a water-filled box column.
Answers
All of the above are acceptable means of making a steel column fire-resistant.
Spraying low-density fibers or cementitious compounds, also known as spray-applied fire-resistive materials, is the most common method of fireproofing.
Applying intumescent mastic/paint also known as intumescent paints protects steel members from fire. By creating a buffer between a steel element and the fire, intumescent coatings can expand by as much as 100 times their original thickness.
Encase the column in concrete is majorly utilized in large sections whereby steel is encased in. Based on the amount of concrete used, this requires more space than other options. Additionally, because it is not as visually appealing as others, it is utilized in settings where appearance is not the primary consideration.
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Realiza las siguientes conversiones.
4 Hm2 a Dm2=_______________
21345 Cm2 a M2=_____________
0,592 Km2 a M2=______________
0,102 M2 a Cm2=______________
23911 Km2 a Hm2=_____________
Answers
Answer:
a) 4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.
b) 21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.
c) 0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.
d) 0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.
e) 23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.
Explanation:
a) 4 hectómetros cuadrados a decámetros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un hectómetro cuadrado equivale a 100 decámetros cuadradps. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 4\,Hm^{2}\times\frac{100\,Dm^{2}}{1\,Hm^{2}}\)
\(x = 400\,Dm^{2}\)
4 hectómetros cuadrados equivalen a 400 decámetros cuadrados.
b) 21345 centímetros cuadrados a metros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 21345\,cm^{2}\times \frac{1\,m^{2}}{10000\,cm^{2}}\)
\(x = 2,135\,m^{2}\)
21345 centímetros cuadrados equivalen a 2,135 metros cuadrados.
c) 0,592 kilómetros cuadrados a metros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 1000000 metros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 0,592\,km^{2}\times \frac{1000000\,m^{2}}{1\,km^{2}}\)
\(x = 592000\,m^{2}\)
0,592 kilómetros cuadrados equivalen a 592000 metros cuadrados.
d) 0,102 metros cuadrados a centímetros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un metro cuadrado equivale a 10000 centímetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 0,102\,m^{2}\times \frac{10000\,cm^{2}}{1\,m^{2}}\)
\(x = 1020\,cm^{2}\)
0,102 metros cuadrados equivalen a 1020 centímetros cuadrados.
e) 23911 kilómetros cuadrados a hectómetros cuadrados:
Según las unidades de área y sus escalas utilizadas por el Sistema Internacional de Pesos y Medidas, un kilómetro cuadrado equivale a 100 hectómetros cuadrados. Entonces, obtenemos el dato equivalente por la siguiente regla de tres simple:
\(x = 23911\,km^{2}\times \frac{100\,Hm^{2}}{1\,km^{2}}\)
\(x = 2391100\,Hm^{2}\)
23911 kilómetros cuadrados equivalen 2391100 hectómetros cuadrados.
Liquid methanol is pumped from a large storage tank through a 1-in.ID pipe at a rate of 3.00gal/mm.
(a) At what rate in (i) ft · lbf/s and (ii) hp is kinetic energy being transported by the methanol in the pipe?
(b) The electrical power input to the pump transporting the methanol must be greater than the amount you calculated in part (a). What would you guess becomes of the additional energy? (There are several possible answers.)
Answers
a) (i) The kinetic energy rate in ft.lbf/s is 0.00771
(ii) kinetic energy being transported by the methanol in the pipe is 1.40 x 10⁻⁵ hp
b) Additional energy is dissipated into other forms. The larger part is heat energy, but also dissipated in light, sound and vibrations.
What is kinetic energy?
The ability of an object to do work by virtue of its motion.
The mass flow rate expressed as
m= 3.00 gal.mm x 1000/264.17L/gal x 0.792 kg/L x 2.20462 / 60= 0.330 lb/s
The velocity is determined by the continuity equation
u= Q/A =[ 3.00 x 35.3145/(264.17x60) ] / π (1/12)²/4
u = 1.225 ft/s
The rate of kinetic energy transport is
K.E = 1/2 x (0.330) x (1.225)² = 0.00771 ft-lb/s
Thus, the kinetic energy rate in ft.lbf/s is 0.00771
The rate of kinetic energy in hp is
K.E = 0.00771 x 1.341 x 10⁻³ /0.7376
K.E = 1.40 x 10⁻⁵ hp
The kinetic energy being transported by the methanol in the pipe is 1.40 x 10⁻⁵ hp
b) The major amount of heat energy is dissipated. The other forms of energy is light, sound and vibrations.
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describe characteristics of an enabling environment that supports children development in relation to emergent maths
Answers
An enabling environment that supports children's development in relation to emergent math is one that fosters curiosity, exploration, and problem-solving. Here are some key characteristics of such an environment:
Play-based Hands-on ResponsiveWhat is an enabling environment?Play-based: Play is the primary mode of learning for young children, and it is through play that they can explore mathematical concepts such as counting, measurement, and shape recognition. An enabling environment for emergent math should provide opportunities for children to engage in open-ended, exploratory play that encourages math-related activities.
Hands-on: Children learn best through concrete, hands-on experiences. An enabling environment for emergent math should provide a variety of materials and resources that children can manipulate and use to explore mathematical concepts.
Lastly, Responsive: An enabling environment should be responsive to children's interests and needs. This means that the adults in the environment should be attuned to what children are interested in and should provide activities and materials that align with those interests.
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Complete the following sentence.
Geometry is a field of ____ that studies the size, shape, and position of structures by analyzing space.
Answers
Answer:
Mathematics
Explanation:
⁄(⁄ ⁄•⁄ω⁄•⁄ ⁄)⁄
Answer:
It is a field if mathematics
.Tech A says that unitized hubs have a wheel nut with a higher installation torque than
serviceable wheel bearings. Tech B says that unitized hubs have the proper bearing end
play designed into the assembly once they are torqued properly. Who is correct?
a. Tech A
b.
Tech B
C
Both a and b
D
Neither a and d
Answers
Tech A says that unitized hubs have a wheel nut with a higher installation torque than serviceable wheel bearings. Tech B says that unitized hubs have the proper bearing end play designed into the assembly once they are torqued properly is Option C: Both a and b
Describe a wheel bearing?When compared to manually adjusted, PreSet, or LMS hub assemblies, unitized hub assemblies often require a lot more assembly torque and special spindle nut systems.
Therefore, An essential component of the wheel assembly that connects the wheel to the axle is a wheel bearing. A metal ring is used to hold a group of steel balls (also known as ball bearings) or taper (also known as tapered bearings) together. It permits the wheel to spin easily and with little resistance.
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On calculating which of the following quantities , does the body have an effect in simple projectile motion?
Answers
Answer:
Force is a kinetic quantity. Force = m x a. Hence, the mass of the body has an effect on force calculation.
Given that the system function of a third order Butterworth type analog low-pass filter with a 3 dB cut-off frequency of 2 radian/second is:
2s HS = S2 + 0.2 s +1
Answer the following questions:
1. Use the bilinear transformation to obtain H(z). Use T=2 second.
2. Give H(w) for your filter.
3. Use MATLAB to give the magnitude spectrum.
4. Comment on the quality of the design.
5. With the aid of simple sketch graphs explain how frequency warping affects the frequency response of the digital filter.
6. Comment on the need for prewarping, i.e. give conditions when prewarping is needed.
Answers
answer
d just too the test
g Steel plates (AISI 1010) of 4 cm thickness initially at a uniform temperature of 500 deg C are cooled by air at 50 deg C with a convection coefficient of 30 W-m2-K-1. Estimate the time it will take for their midplane temperature to reach 100 deg C.
Answers
Solution :
Characteristic length = thickness / 2
\($=\frac{0.04}{2}$\)
= 0.02 m
Thermal conductivity for steel is 42.5 W/m.K
\($\text{Biot number} = \frac{\text{convective heat transfer coefficient} \times \text{characteristic length}}{\text{thermal conductivity}}$\)
\($=\frac{30 \times 0.02}{42.5}$\)
= 0.014
Since the Biot number is less than 0.01, the lumped system analysis is applicable.
\($\frac{T-T_{\infty}}{T_0-T_{\infty}} = e^{-b\times t}$\)
Where,
T = temperature after t time
\($T_{\infty}$\) = surrounding temperature
\($T_0$\) = initial temperature
\($b=\frac{\text{heat transfer coefficient}}{\text{density} \times {\text{specific heat } \times \text{characteristic length }}}$\)
t = time
We calculate B:
\($b=\frac{30}{7833 \times 460 \times 0.02}$\)
= 0.000416
Thus, \($\frac{100-50}{500-50}=e^{-0.00416 \times t}$\)
t = 5281.78 second
= 88.02 minutes
Thus the time taken for reaching 100 degree Celsius is 88.02 minutes.
what are difference between conic sectional and solids?
Answers
Answer:
Conic Sections
a conic section is a curve which is obtained when a surface performs an intersection with a plane. The types of conic sections include hyperbola, parabola and ellipse. A circle can also be considered as a conic section.
Conic Solids on the other hand are the set of points on any segment between a region and a point which is not present in the plane of the base. They are solids with one base.
Technician A says that the B-pillars aid in resisting roof crush.
Technician B says that the IIHS rates vehicles to resist roof crush to five times the weight of the vehicle.
Who is right?
A only
O B only
Both A and B
Neither Anor B
Answers
Answer:
The answer is "Both A and B" are right
Explanation:
During the previous twenty years car producers have made significant advances in planning vehicle structures that give more noteworthy tenant insurance in planar accidents (Lund and Nolan 2003). Be that as it may, there has been little agreement with respect to the significance of rooftop strength in rollover crashes, just as the best strategy for surveying that strength. In 2006 one-fourth of lethally harmed traveler vehicle tenants were associated with crashes where vehicle rollover was considered the most hurtful occasion (Protection Establishment for Expressway Wellbeing, 2007). Numerous lethally harmed tenants in rollovers are unbelted, and some are totally or mostly launched out from the vehicle (Deutermann 2002).
There is difference concerning how underlying changes could influence launch hazard or the danger of injury for inhabitants who stay in the vehicle, paying little mind to belt use.
Answer:A Only
Explanation:
I Took the test
1lb-mass of water fills a 2.4264-ft3 weighted piston-cylinder device at a temperature of 600of. the piston-cylinder device is now cooled until its temperature is 200of. determine the final pressure of water, in psia, and the volume, in ft3.
Answers
The final pressure of water is 397.15 psia, and the final volume is \(4.1403 ft^3\)
To solve this problem, we can use the ideal gas law, which relates the pressure, volume, and temperature of a gas.
However, water is not an ideal gas, so we need to use the appropriate equation of state for water, such as the steam tables.
Given data:
Mass of water = 1 lb
Initial volume = 2.4264 ft^3
Initial temperature = 600 °F
Final temperature = 200 °F
We need to determine:
Final pressure of water in psia
Final volume of water in ft^3
To solve this problem, we can use the steam tables to find the specific volume of water at the given initial and final temperatures.
At 600 °F, the specific volume of water is 0.0105 ft^3/lb, and at 200 °F, the specific volume is 0.0179 ft^3/lb.
Using the principle of mass balance, we can write:
Initial mass = Final mass
Density × Initial volume = Density × Final volume
We know the initial mass of water is 1 lb, and we can use the initial specific volume to find the initial density:
Initial density = 1 lb / 0.0105 ft^3/lb = 95.2381 lb/ft^3
Now we can solve for the final volume:
Final volume = (Initial volume × Initial density) / Final density
Final density = \(1 lb / 0.0179 ft^3/lb = 55.8659 lb/ft^3\)
Final volume = \((2.4264 ft^3) * (95.2381 lb/ft^3) / (55.8659 lb/ft^3) = 4.1403 ft^3\)
Finally, we can use the ideal gas law to find the final pressure of water:
P1 × V1 / T1 = P2 × V2 / T2
where P1, V1, and T1 are the initial pressure, volume, and temperature, and P2, V2, and T2 are the final pressure, volume, and temperature.
We can assume that the system is quasi-static and adiabatic, so the process is reversible and no heat transfer occurs. Therefore, the entropy change is zero, and we can use the isentropic relation:
\(P2 / P1 = (V1 / V2)^{(k)}\)
where k is the specific heat ratio of water, which varies with temperature. At the given temperatures, we can use an average value of k = 1.31.
Substituting the values and solving for P2, we get:
\(P2 = P1 * (V1 / V2)^{(k)} = 397.15 psia\)
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what is the division of demand
Answers
The predator uav has the following characteristics: has the following characteristics: wingspan = 14.85 m, wing area = 11.45 m2, maximum weight = 1020 kgf, and fuel weight = 295 kgf. the power plant is a rotax four-cylinder, four-stroke engine of 85 horsepower driving a two-blade, variable-pitch pusher propeller. assume that the oswald efficiency factor is 0.7, the zero-lift drag coefficient is 0.03, the propeller efficiency is 0.9, and the specific fuel consumption is 0.2 kgf of fuel per horsepower per hour. calculate the following:
1: maximum velocity at sea level.
2: the maximum range
3: the maximum endurance
Answers
The maximum velocity at sea level can be found using the following equation:
V_max = sqrt((2 * W) / (rho * S * CL_max))
where:
W = maximum weight = 1020 kgf
rho = air density at sea level = 1.225 kg/m^3
S = wing area = 11.45 m^2
CL_max = maximum lift coefficient = (2 * W) / (rho * V^2 * S)
To find CL_max, we need to assume a value for the velocity V and iterate until convergence. Let's start by assuming V = 70 m/s:
CL_max = (2 * 1020 kgf) / (1.225 kg/m^3 * (70 m/s)^2 * 11.45 m^2) = 1.87
Now we can use this value to find the maximum velocity:
V_max = sqrt((2 * 1020 kgf) / (1.225 kg/m^3 * 11.45 m^2 * 1.87)) = 35.5 m/s
Therefore, the maximum velocity of the Predator UAV at sea level is approximately 35.5 m/s.
Maximum Range:
The maximum range can be found using the following equation:
R = (L/D) * (1/OE) * ln(Wi/Wf)
where:
L/D = lift-to-drag ratio = CL / CD
CL = lift coefficient = W / (0.5 * rho * V^2 * S)
CD = drag coefficient = CD_0 + (CL^2 / (pi * e * AR))
CD_0 = zero-lift drag coefficient = 0.03
e = Oswald efficiency factor = 0.7
AR = aspect ratio = (wingspan)^2 / S
OE = overall efficiency = propeller efficiency * engine efficiency
propeller efficiency = 0.9
engine efficiency = 0.85 (assuming 85 horsepower for the engine)
Wi = initial weight = maximum weight + fuel weight = 1020 kgf + 295 kgf = 1315 kgf
Wf = final weight = maximum weight
We can start by assuming a value for the velocity V and iterating until convergence. Let's start with V = 25 m/s:
CL = 1315 kgf / (0.5 * 1.225 kg/m^3 * (25 m/s)^2 * 11.45 m^2) = 1.67
AR = (14.85 m)^2 / 11.45 m^2 = 19.3
CD = 0.03 + (1.67^2 / (pi * 0.7 * 19.3)) = 0.071
L/D = 1.67 / 0.071 = 23.5
OE = 0.9 * 0.85 = 0.765
R = 23.5 * (1/0.765) * ln(1315 kgf/1020 kgf) = 393 km
Now we can try a different value for V, let's say V = 30 m/s:
CL = 1315 kgf / (0.5 * 1.225 kg/m^3 * (30 m/s)^2 * 11.45 m^2) = 1.24
AR = (14.85 m)^2 / 11.45
_____is a slow wireless technology used to connect devices within a radius of about 30 feet
Answers
Answer:
Bluetooth is a slow wireless technology used to connect devices within a radius of about 30 feet. While Bluetooth technology is amazing, there are lots of bugs involved with Bluetooth devices, and there is still lots to be discovered in this area of tech.
Which of the following is NOT a component of the lac operon? the operator and promoter sequences the structural genes for lacZ, lacY, and lacA a separate operator for the lacI gene a lacI gene
Answers
B. The LacI gene is not a lac operon structural gene. mRNA elongation and/or transcription initiation can also be hampered by LacI.
What exactly does LacI do?The inhibition of mRNA production for lac operon-encoded proteins is the function of LacI. LacZYA mRNA is only transcribed at extremely low levels, so transcription is not completely eliminated. This function is carried out by inhibiting transcription through a variety of means by specific binding of LacI protein to the lac operator DNA sequence. LacI binding faces direct competition from RNA polymerase for binding this region because the promoter overlaps the lac operator (LacO). When lactose is unavailable as a substrate for the lac metabolic proteins, the LacI-LacO association and subsequent transcription repression take place.
LacY is able to transport a small amount of lactose into the bacterium because of the low levels of metabolic enzymes. After that, residual LacZ metabolizes lactose into glucose and galactose when lactose is available as a carbon source.
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HELPPPPP Which option identifies the government agency responsible for monitoring the situation in the following scenario? A salmonella outbreak in 2012 was caused by frozen raw yellowfin tuna. More than 100 people became sick from eating the contaminated tuna. Food and Drug Administration Environmental Protection Agency Forest Service Department of Agriculture
Answers
Answer:
Food and drug admin
Explanation:
The code requires switches to be
installed at
entrance to a room.
A. every
B. every other
C.Only one
Answers
The code requires switches to be installed at every entrance to a room.
What is every?In English language, every can be defined as a determiner and it is typically used before a singular noun while referring to each of the members of a set without exception.
In this context, every is the most appropriate word to use in filling the blank because entrance is a singular noun while the room is a set.
Therefore, the code requires switches to be installed at every entrance to a room.
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The primary energy source for the controller in a typical control system is either brainlythe primary energy source for the controller in a typical control system is either
Answers
Answer:
a pneumatic or electric power
Explanation:
The primary energy source for the controller in a typical control system is either "a pneumatic or electric power."
This is because a typical control system has majorly four elements which include the following:
1. Sensor: this calculates the controlled variable
2. Controller: this receives and process inputs from the sensor to the controlled device as output
3. Controlled device: this tweak the controlled variable
4. Source of energy: this is the energy used to power the control system. It could be a pneumatic or electric power