Taller towers allow turbines to catch more energy and produce more electricity since wind speed rises with height.
Does altitude affect wind power?When the wind speed at the surface is insufficient to drive a conventional turbine, wind power can be accessible higher up. At higher altitudes, the wind blows steadier, reducing erraticness. Wind speed has a cubic effect on power. Going a bit higher could therefore result in a lot more power.They discovered that winds have the highest wind power density at altitudes around 32,000 feet by analysing the distribution of wind power in the atmosphere, by location, and over time.With the initial tests being conducted roughly 12 years ago, high altitude (500 to 2000 m) wind power generators are still in a relatively early stage of development.Average surface wind speeds are significantly below the 5 m/s needed for traditional ground-based wind turbines to function over the majority of Earth's land area. Therefore, conventional wind turbines can only be installed in specific locations where strong, consistent surface winds blow on a regular basis.To learn more about wind power refer :
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for prob. p6.62 suppose the only pump available can deliver 80 hp to the fluid. what is the proper pipe size in inches to maintain the 3 ft'/s flow rate?
The proper pipe size in inches to maintain the 3 ft'/s flow rate is 7.3
Does pipe size affect flow rate?The cross sectional area of the pipe has an inverse relationship with flow velocity at any given flow rate. Higher flow rates result from smaller pipes; slower speeds result from larger pipes.
According to the continuity equation, we can increase the volume flow rate, or the velocity of the fluid passing through the pipe, by reducing the pipe's diameter. The fluid velocity is unaffected by the pipe's length, whether it is longer or shorter.
Larger pipes improve the water flow through the line, but they won't boost your water pressure if the water flow isn't sufficient. Although municipal water systems offer tremendous pressure, a larger line won't necessarily be beneficial.
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A large number of compromised computers are infected with malware that allows an attacker (herder) to control them to spread email spam and launch denial-of-service attacks.
Which of the following dose this security threat describe?
The dose of this security threat describes is Zombie/botnet. The correct option is d.
What is a Zombie/botnet?A "zombie" or "bot" is a compromised computer under the control of an attacker, who frequently manages a botnet of other compromised devices.
A bot, short for "robot," is a sort of software application or script that executes automatic tasks when given a command. Malicious bots carry out malicious actions that allow an attacker to remotely manipulate an afflicted computer. These infected machines may be referred to as zombies once infected.
Therefore, the correct option is d, Zombie/botnet.
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The question is incomplete. Your most probably complete question is given below:
Phishing
Man-in-the-middle
Spoofing
Zombie/botnet
a. By selecting NA and ND, the acceptor and donor densities introduced in the semiconductor, a device engineer can control: 1. The values ofn0andp0for the semiconductor used in devices. 2. The group number on the periodic chart for silicon and different dopants. 3. The intrinsic carrier concentration of a semiconductor for operating temperatures of a device. 4. All of the above.
Option 3 is correct. The semiconductor's intrinsic carrier concentration at a device's operational temperature.
Any member of the family of crystalline solids known as a semiconductor falls into the range of conductors and insulators in terms of electrical conductivity. Diodes, transistors, and integrated circuits are just a few of the electrical devices that use semiconductors in their production. Due to their portability, dependability, energy efficiency, and affordability, these gadgets are widely used. They have been utilized as discrete components in solid-state lasers, optical sensors, and power devices. They are capable of handling a wide range of current and voltage, and more importantly, they are well suited for integration into intricate but easily fabricated microelectronic circuits.
They currently serve as, and will continue to serve as, the primary components of the majority of electronic systems, supporting computing, communications, signal processing, and control applications for both consumer and industrial markets.
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9.11 viscous fluid flows past a flat plate such that theboundary layer thickness at a distance 1.3 m from the leading edgeis 12 mm. determine the boundary layer thickness at distances of0.20, 2.0, and 20 m from the leading edge. assume laminar flow. (b)if the upstream velocity of the flow in part (a) is u 1.5 m/s,determine the kinematic viscosity of the fluid.
A) The boundary layer thickness from the leading edge at distances of 0.20m = 0.004706
2.0m = 0.014884
20m = 0.04706
B) If the upstream velocity of the flow in part (a) is u 1.5 m/s, then the kinematic viscosity of the fluid at
At 0.20m, v = 6 × 10⁻⁷ m²/sec
At 2.0m, v = 6 × 10⁻⁶ m²/sec
At 20m, v = 6 × 10⁻⁵ m²/sec
What is kinematic viscosity?A fluid's internal resistance to flow when subjected to gravitational forces is measured by a property called kinematic viscosity. A calibrated viscometer at a tightly regulated temperature is used to measure the number of seconds needed for a fixed volume of fluid to move a known distance through a capillary.
Standard units are used to translate this value into square millimeters per second or centistokes (cSt). Only when the test's temperature is reported along with the viscosity, for instance 23 cSt at 40 degrees C, is the viscosity reporting considered valid.
Viscosity testing offers the highest degree of consistency and repeatability among all used oil analysis tests. The viscosity of the base oil, meanwhile, is the factor that is most important for efficient component lubrication.
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g determine the transfer function of the system (b) determine the modal form of the system (c) find the transfer function of the system from its modal form. is it the same as the one you found in (a)?
If you rotate a sample with two strain gauges attached to it by 90 degrees and apply a point load, you should expect to see a change in the readings on the strain gauges. When a load is applied to a material, it will cause the material to deform, which can be measured using strain gauges. In this case, the rotation of the sample would change the orientation of the strain gauges relative to the applied load, which would affect the readings.
A strain gauge is a device that is used to measure the strain or deformation of a material. It consists of a thin strip of conductive material, such as a metallic foil, which is attached to the surface of the material. When the material is subjected to a load, the strain gauge will experience a change in electrical resistance, which can be measured using a meter or other device. This change in resistance is proportional to the strain on the material, and can be used to calculate the amount of deformation that has occurred. Strain gauges are commonly used in engineering and materials science to measure the response of materials to different loads and conditions.
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a steady green light signal directed from the control tower to an aircraft in flight is a signal that the pilot. t/f
A steady green light signal directed from the control tower to an aircraft in flight is a signal that the pilot is cleared to land. A steady green light signal can also be meant by take off.
A steady green signal can be meant by “go.” A green arrow means you have a “protected” turning movement. If there is no green arrow, left and right turning traffic is “allowed”. If you are airborne, a steady green light is meant by a warning "clearance to land". It's pretty straight forward indeed. This suggests that upon your arrival the runway will be empty and you have been allowed to land there.
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he gas storage tank has a longitudinal welded seam on its cylindrical section. the tank has an inner diameter of 1.40 m and a wall thickness of 5.0 mm. determine the magnitude of normal stress on the horizontal weld if the internal tank pressure is 1.2 mpa.
The magnitude of Normal stress on the weld = 168 MPa, if the internal tank pressure is 1.2 mpa.
What is stress?Stress is defined as a force per unit area within a material that results from externally applied forces, uneven heating, or permanent deformation and that enables an accurate description and prediction of elastic, plastic, and fluid behavior in physical sciences and engineering. By dividing a force by an area, a stress is expressed.
Shear stress is caused by forces that are parallel to and lie in the plane of a cross-sectional area of the material, as opposed to normal stress, which is caused by forces that are perpendicular to the area. Tensile stress is the name given to the specific type of normal stress that arises from tension.
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what is the output frequency of a three-stage binary counter with an input clock frequency of 80 khz?
If a clock frequency is utilized, the lowest output frequency that may be used with a cascaded counter is: 10 kHz will be the output frequency that is lowest.
What is the counter's output frequency?The output frequency for a binary counter or M mod counter, depending on whether it is synchronous or asynchronous, is f/2n, where f is the input frequency and n is the number of flip-flops (but only if the duty cycle is 50%).In digital logic and computing, a counter is an object that keeps track of (and occasionally shows) the frequency of a given event or process, typically in relation to a clock.The type that is used the most frequently is a sequential digital logic circuit, which has a clock-input line and many output lines.Two states are counted by a binary three-stage counter. As a result, the output frequency is 80/23 = 80/8 = 10 khz.What is the output frequency of a 4-bit binary counter for a 160 MHz input clock? The output of a 4-bit counter's final flip-flop is equal to the input clock/16.This means that 10MHz, or 160MHz/16, is the output frequency.To Learn more About lowest output frequency refer to:
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qam (quadrature amplitude modulation) uses phase and amplitude to indicate different signals so that multiple bits can be sent in a clock cycle. more generally, there is a relationship between the number of bits per second (bps) and the number of different signal combinations (states) and the baud rate (signal changes per second). if i want a data rate of 30,000 bps and the baud rate is 10,000 how many states do i need.
8 states are required to achieve a data rate of 30,000 bps and a baud rate of 10,000.
How do clock cycles work?
Your CPU's clock speed, expressed in GHz, tracks how many cycles it completes each second (gigahertz). Technically speaking, a "cycle" is a pulse timed by an internal oscillator, however for our purposes, they serve as a foundational measure of a CPU's speed. The CPU contains billions of transistors that open and close during each cycle. In certain circumstances, one instruction may be processed over several clock cycles, whereas in other cases, numerous instructions may be finished in a single cycle.
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Adding deductive reasoning to traditional DBMS functions is a benefit of integrating an expert system into the database component of a(n) _____
Adding deductive reasoning to traditional DBMS functions is a benefit of integrating an expert system into the database component of a(n) DSS (Decision Support System)
What is DBMS?
A computer software known as an expert system use artificial intelligence (AI) techniques to mimic the decision-making and actions of a person or group of people who have knowledge and experience in a certain field. Expert systems are often designed to support human experts rather than to replace them.
Recognizing distinct consumer demographics, such as devoted, new, or prospective customers. Prospects are categorized based on their demographics and other possible demographics, such as potential hobbies. gives significant accounts top priority. tailors marketing messaging to certain targets.
Many information systems strive to convert data into information so that knowledge may be created that can be applied to making decisions.
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prob 3 knief 6-6) based on the 0.025-ev cross sections and the decay constants in fig. 2-16 and a thermal-neutron flux of 5 x 1013 /cm2s: (4 points total) a. estimate the fractional depletion of 235u during 1 year of operation. b. estimate the fraction of 238u that would be converted to 239u in 1 year. c. calculate the instantaneous decay and neutron absorption rates for 239u nuclei and determine their fraction of the combined loss rate. d. repeat (c) for 239np. e. estimate the fraction of 238u absorptions that result in the production of 239pu.
A radioactive nuclide's decay constant (symbol: and units: s1 or a1) is its probability of decay per unit time. As a result, the number of parent nuclides P decreases with time t, as dP/P dt = −λ.
What is Radioactivity?
Radioactivity, as the name implies, is the act of emitting radiation spontaneously. This is accomplished by an atomic nucleus that is unstable for some reason; it "wants" to give up some energy in order to shift to a more stable configuration.
Much of modern physics was devoted to understanding why this happens during the first half of the twentieth century, with the result that nuclear decay was fairly well understood by 1960. When a nucleus has too many neutrons, it emits a negative beta particle, which converts one of the neutrons into a proton.
When there are too many protons in a nucleus, it emits a positron (positively charged electron), converting a proton into a neutron. When a nucleus has too much energy, it emits a gamma ray, which discards a large amount of energy without changing any of the particles in the nucleus. When a nucleus has too much mass, it emits an alpha particle, discarding four heavy particles (two protons and two neutrons).
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the engine in problem 9-7 operating at 2500 rpm has an indicated thermal efficiency of 61%, combustion efficiency of 98%, and mechanical efficiency of 71%. calculate: (a) brake specific fuel consumption. [gm/kw-hr] (b) specific emissions of soot particulates. [gm/kw-hr] (c) emissions index of soot particulates. [gm/kg]
The engine operating at 2500 rpm has an indicated thermal efficiency of 61%, combustion efficiency of 98%, and mechanical efficiency of 71%, then its:
a) Brake specific fuel consumption is 0.0445 kg/hr
b) Specific emissions of soot particulates is 0.42 kW
c) Emissions index of soot particulates is 3.79 × 10¹⁵
What is mechanical efficiency?Mechanical efficiency is a dimensionless number in mechanical engineering that quantifies how well a machine or mechanism converts the power input into the device's output. A machine is a mechanical linkage that uses applied force to move a load from one point to another.
A machine's power input is always equal to its input force times the velocity of its input point, and its power output is always equal to the force applied to its load times the velocity of the load.
The mechanical efficiency of a machine is a dimensionless number between 0 and 1 that measures the relationship between the machine's power output and power input. It is frequently represented by the Greek letter 'η'.
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the principle that the rate of corrosion is controlled by one of two reduction mechanisms is referred to as
Answer:
1) Metal type
2) Protective coatings
3) Environmental measures
4) Sacrificial coating
5) Corrosion inhibitor
6) Design modification
TRUE/FALSE. One highly publicized form of social engineering is called post texting, which is a method of obtaining personal information under false pretenses.
Post-texting under false presenses is one well-known example of social engineering. False: This is a ruse.
What is engineering?
Applying math and science to solve issues is engineering. Engineers are the ones who translate scientific and inventive discoveries into practical applications. In engineering, science and math are used to address practical issues and create better environments for us all. The ability to put ideas into practice in a way that is both practical and cost-effective is what really sets engineers apart. What distinguishes engineers from other branches of science and mathematics is their capacity to transform abstract ideas into physical reality.
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question at position 6 a three-phase transformer connection has a delta-connected primary and a wye-connected secondary. the center tap of the wye is used as a neutral conductor. if the line-to-line voltage is 480 v, what is the voltage between any one phase conductor and the neutral conductor?
207.84 V is the voltage between any one phase conductor and the neutral conductor.
What is phase conductor?Line conductor that is used in an AC electric circuit as a phase conductor. It transmits electrical energy and is, therefore, a live conductor under normal circumstances. The more accurate term "phase conductor" is not always used, especially in the United States and some other nations. Instead, the phrase "line conductor in AC system" is frequently used.
Phase conductors and neutral conductors are used in electrical installations of buildings to supply power for the AC electrical equipment used in them.
A phase conductor is a current-carrying conductor that is included when calculating the total number of electrical conductors used in a circuit, network, or system of electrical devices.
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we want to replace a 119 mw coal-fired power plant with a geothermal power plant. the geothermal recovery rate at the location is 5.6 w/m2 and we can assume that the geothermal plant runs at 100% capacity with a 17% total conversion efficiency. how much area (at a minimum) does the geothermal plant need to extend pipes to achieve 119 mw production?
Area the geothermal plant need to extend pipes to achieve 119 mw production is 99.1926 km²
What is a geothermal plant?Electrical energy derived from geothermal energy is known as geothermal power. Dry steam, flash steam, and binary cycle power plants are among the technologies currently in use. Currently, 26 countries use geothermal energy for the production of electricity, and 70 countries use it for heating.
In 2019, there were 15.4 gigawatts (GW) of geothermal power installed in the world, with 3.68 GW, or 23.9 percent, installed in the United States. Global geothermal power capacity is anticipated to reach 14.5–17.6 GW by 2020, with international markets expanding at an average annual rate of 5% over the three years leading up to 2015.
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You just posted new photographs to Shutterfly, and the site asks you to review the metadata. Metadata includes the following information EXCEPT _____.
A. The date a photo was taken
B. The file size
C. The GPS location coordinates
D. The HTML coding
You just posted new photographs to Shutterfly, and the site asks you to review the metadata. Metadata includes the following information EXCEPT The HTML coding.
What is HTML coding?Hyper Text Markup Language is what HTML is. The preferred markup language for building Web pages is HTML. A Web page's structure is described in HTML. A number of elements make up HTML. The content's presentation in the browser is controlled by HTML elements.The term "HTML" stands for "Hypertext Markup Language." Specifically created for digital consumption, HTML files are text-only documents with highly interactive information. This implies that rather than being printed, they work best as an on-screen viewing file.The preferred markup language for Web pages is HTML. You may build your own website using HTML. HTML is simple to learn, and you'll like it.Learn more about HTML coding refer to :
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what is the driving force for flow in an open channel? how is the flow rate in an open channel established?
Gravity acts as the primary factor causing flow in an open channel. An open channel's flow rate is determined. Open-channel flow is implied by flow in a channel that is open to the atmosphere.
What controls the flow in an open channel?On the other hand, in an open channel flow, the flowing liquid has a free surface at atmospheric pressure and is propelled by gravity.
What determines the flow rate in an open channel?The standard technique is to construct a weir or flume across the flow, monitor the flow velocity, and using a radar or ultrasonic level sensor, measure the height of the liquid just before the weir or flume. This measured height can subsequently be used to compute the volume flow rate.
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which best describes machine language? select one. question 1 options: machine language is the most used language today. machine language instructions comprise only 1s and 0s of binary code. machine language is considered the easiest language to write. machine language relies heavily on go to statements question 2 (1 point) saved listen readspeaker webreader: listen which is a type of high level programming? select one.
Machine language, also known as machine code or object code, is a set of binary digits or bits that the computer reads and decodes. The only language that a computer can comprehend is machine language.
The fundamental language of computers is machine code, which is also referred to as machine language. It is made of digital binary integers, is read by the central processing unit (CPU) of the computer, and appears to be a very lengthy string of zeros and ones.
Machine language is a type of low-level programming language that can only be understood by machines and is composed of binary integers or bits. The CPU immediately executes the instructions, often known as machine code or object code.
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An air-conditioning system is used to maintain a house at a constant temperature of 20 °C. The house is gaining heat from outdoors at a rate of 20000 kJ/h, and the heat generated in the house from the people, lights, and appliances amounts to 8000 kJ/h. For a COP of 2.5, determine the required power input to this air-conditioning system.
The required power input to this air-conditioning system is 3.11kW
How to solve for the required power inputWe would have to calculate the cooling load of the airconditioner first
This is given as
Q outdoors + Q house
In the question
Q outdoors = 20000
Q house = 8000 kJ/h
Cooling load = 20000 kJ/h + 8000 kJ/h
= 28000 kJ/h
Next we have to solve for the power input into the house
28000 / 2.5
= 11200 kJ/h
11200 kJ/h ÷ 1 / 3600
= 3.11kW
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Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the
A. Possibility of causing delamination
B. Difficulty in forming a proper shop head.
C. Increased possibility of fretting corrosion in the fastener
Option c is correct. Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the increased possibility of fretting corrosion in the fastener.
Fretting corrosion is the outcome of simultaneous physicochemical and mechanical surface interaction in a tribological contact, and it is the irreversible change of a material. A specific load and cyclic displacement with a limited amplitude must be applied to the contact between the surfaces of two materials for fretting corrosion to take place.
Small gaps develop between the surfaces in contact as a result of cyclic tension. Either material is lost or cracks start to appear as a result. Fretting corrosion's side effect of contact corrosion almost always causes a blockage because the lack of functional movement makes it impossible to remove debris. When debris is still trapped, there is blockage because the oxide takes up more space than the original material.
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Question 8: Several forces are applied to the pipe assembly shown. If the inner and outer diameters of the pipe are equal to 1.50-in. and 1.75-in. respectively, determine: a-The state of the stress at point H on the top outside surface of the pipe. Show the results on a volume element. b-The principal stresses and maximum shear stress. c-The principal planes and plane of maximum shear. 6 in. a: 12 in -- 1,982-psi = 0.0 T= 670-psi 10 in. b: 0 = 205-psi =-2187-psi -- 1196-psi in-plane o min τ max 30 lb 5011 Sin. c c: = -17° CW or 73° CCW = +28° CCW Sin. E 50 lb 30 lb
The difference between the primary stresses divided by one-half is the maximum shear stress. It should be noticed that two angles between 0° and 360° are produced by the primary planes equation, 2p.
Principal stress axes are perpendicular to zero shear stress planes. Orthogonal primary axes are present. The greatest shear stress is 45 degrees away from the main stress vector. The difference between the primary stresses divided by one is the maximum shear stress. Principal stresses are the highest and lowest normal stress values on a plane that is rotated through an angle and does not experience shear stress. Primary Plane On that plane, the main stresses are present, and there is no shear stress.
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One hundred units of coal energy are converted to electricity, which is then used to power an incandescent light bulb that produces 1.2 units of light energy. This results in a 1.2% ________.
energy end-use efficiency
One hundred units of coal energy are converted to electricity, which is then used to power an incandescent light bulb that produces 1.2 units of light energy. This results in a 1.2% energy end-use efficiency.
The relevance and advantages of taking energy end-use efficiency into account when making energy economic decisions are covered in this article, which was commissioned by the InterAcademy Council. The idea of energy end-use efficiency is to deliver more desired services for each unit of energy spent. Amory Lovins asserts that improving energy end-use efficiency is typically the most effective, cost-effective, environmentally friendly, and underutilized method of delivering energy services.
Making engineering choices based on energy end-use efficiency enables systems to use energy more efficiently along energy conversion chains, allowing for more work to be done with it. Adopting energy end-use efficiency has multiple advantages, according to this paper, including better services (comfortable buildings with more eye-catching lighting), a stronger position in the world's fuel markets, and the integration of efficiency with supply.
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nolan is considering the use of several different types of alternate processing facility for his organization's data center. which one of the following alternative processing sites takes the longest time to activate but has the lowest cost to implement?
Since all hardware, software, and data must be loaded at the new site, a cold site is the least expensive choice, but it also has the longest switchover time.
Virtualization pioneer VMware offers DR through its vSphere Replication and Site Recovery Manager products, among others. The most crucial element in company continuity and catastrophe recovery planning is employee safety. A DRP's goal is to make sure that an organization is prepared to respond to a disaster or other event that affects information systems while minimizing the impact on daily operations. A backup location known as a "cold site" has little to no hardware installed.
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Calculate the buoyancy force acting on a partially immersed boat (V=5.0 m³). The density of water is 1000 kg/m³. Express your answer in both SI and U.S. Customary units.
CALCULATION :
SI units:
Buoyancy force = (Volume of water displaced) x (Density of water) x (Acceleration due to gravity)
Buoyancy force = (5.0 m³) x (1000 kg/m³) x (9.81 m/s²)
Buoyancy force = 49,050 N
U.S. Customary units:
Buoyancy force = (Volume of water displaced) x (Density of water) x (Acceleration due to gravity)
Buoyancy Force = (5.0 m³) x (62.4 lb/ft³) x (32.17 ft/s²)
Buoyancy Force = 11,230 lb
What is force ?
A force is anything that pushes or it pulls an object. The objects' interactions with one another are also what causes push and pull. Pressure can also be represented using terms like extend and compress.
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isotropic point sources each emitting s neutrons/sec are placed in an infinite moderator at the four comers of a square of side a. compute the flux and current at the midpoint of any side of the square and at its center.
Add the two numbers together and divide by two to determine the middle of any range. In this case, 0 + 5 equals 5, 5 / 2 equals 2.5.
A line segment's exact midpoint is the point that lies halfway between its two endpoints. It is therefore the average of the two endpoints, which is the average of the two x- and y-coordinates. Discover the endpoints' coordinates. As a result, the electric field along OB at midpoint O is 5.4 106 N C1. (b) At mid-point O, a test charge in the amount of 1.5 109 C is positioned. Line OA is the direction of the force. This is due to the fact that the charge applied at point B repels the negative test charge whereas point A attracts it.
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a radiograph of a pa oblique (scapular y) lateral position reveals that the scapula is slightly rotated (the vertebral and axillary borders are not superimposed). the axillary border of the scapula is determined to be more lateral compared with the vertebral border. which of the following modifications should be made for the repeat exposure?
Nothing (acceptable image because the greater tubercle is in profile) (acceptable image because the greater tubercle is in profile.)
In anatomy, a tubercle is any spherical nodule, tiny elevation, or warty protrusion found on the surface or internal organs of a plant or an animal. The word tubercle is derived from the Latin word tuberculum, which means "lump." A tubercle is typically a projection that resembles a wart, however depending on the family of plants or animals it is used to describe, it might have a slightly different connotation.
It refers to a spherical nodule, tiny prominence, or warty protrusion seen on the lip in the case of some orchids and cacti. They go by the name podaria as well (singular podarium). It is used to describe the wart-like excrescences that can be found on the roots of some members of the pea family.
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Water at P1= 20 bar, T1= 400°C enter a turbine operating at teady tate and exit at P2= 1. 5 bar, T2= 240°C. The water ma flow rate i 4000 kg/hour. Stray heat tranfer and kinetic and potential energy effect are negligible. Determine the power produced by the turbine, in kW, and the rate of entropy production in the turbine, in kW/K
The Quality value is not 98%
How to calculate the quality value ?Given ,
inlet pressure p1 = 20 bar
outlet pressure p2 = 1.5 bar
temperature t1 = 400°C
as assume here assume isentropic process so equation that states stray heat transfer is negligible so Q = 0 and S1 = S2
S1 = Sf2 + x Sfg2 ............ ............1
here x is quantity of steam and we get all other value by steam table
so at pressure 20 bar and 400°C and at pressure 1.5 bar
S1 = 7.127 kJ/kg K and Sf2 = 1.4336 kJ/kg K
and Sfg2 = 5.7898 kJ/kg K
so put all value in equation 1 we get x that is
x = 7.127 - 1.4336/5.7898
x = 0.9833
x = 98.33 %
so here we can say quality value is not 98%
The complete question is : Water at 20 bar, 400°C enters a turbine operating at steady state and exits at 1.5 bar. Stray heat transfer and kinetic and potential energy effects are negligible. A hard-to-read data sheet indicates that the quality at the turbine exit is 98%. Can this quality value be correct? If no, explain. If yes, determine the power developed by the turbine, in kJ per kg of water flowing.
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Draw a circuit that computes the function described by the input/output table. You may want to use the laws of Boolean algebra to simplify your Boolean expression before you draw the circuit. x y f(x,y) (a) 0 x y z f(x y,z) 0 1 0 0 (b) 0 1 0 10 0 1 0 1 0 0
B is a non-empty set, + and. are binary operations in B,'is a unary operation in B, and 0 and 1 are special elements of B. This is known as a Boolean Algebra.
A Boolean algebra is a mathematical construction with the notation (B,+,., ', 0,1) where B is a non-empty set, + and. are binary operations in B,'is a unary operation in B, and 0 and 1 are special elements of B,
such that:
a) + and. are communative: for all x and y in B,
b) x+y=y+x, and x.y=y.
c) Both x.(y+z) and x+(y.z) are equal to (x+y).(x+z).
d) Identity laws: 0+x=x+0=x for any x in B and 1.x=x.1=x
e) Complementation laws: for all x in B, x+x'=1 and x.x'=0.
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Suppose a Vestas 112-m wind turbine rated at 3.075 MW is installed at a site having Rayleigh wind statistics with an average wind speed of 8 m/s at the hub height. The cut-out speed VF is 25 m/s.
Estimate the annual electricity generation.
How many hours per year will the turbine be shutdown due to excessive winds
The annual electricity generation of the year, E = 8755.88 MWh/year.
Hours per year the turbine will be shutdown due to excessive winds, T = 4.0883 hours/year
What is electricity?Electricity is a group of physical phenomena that are connected to the presence and movement of matter that possesses an electric charge. In accordance with Maxwell's equations, magnetism and electricity are both components of the phenomenon known as electromagnetism.
Electricity is a factor in many everyday occurrences, including lightning, static electricity, electric heating, electric discharges, and a host of others.
An electric field is created when there is a charge present, which could be positive or negative. Electric current, which also creates a magnetic field, is created when electric charges move. An electric field that is not zero will exert a force on a charge when it is placed there.
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