The system to substantially reduce the smoke intrusion into egress stairways is stairway pressurization.
What is stairway pressurization?Stairway pressurization is a system to make mechanical ventilation design in order to establish air pressure between adjoining areas usually for escape route and burning room.
Stairway pressurization will use the different air pressure to ensure the one side of wall has positive air pressure and the other one has negative air pressure. Installed fans that will suck air into the stairwell is necessary in stairwell pressurization system.
With the different of air pressure, the smoke will exhausted into the other area than stairway, usually the rooftop. So, occupants can use stairs to exit.
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technician a says ac circuits are used in virtually all chassis circuits because a battery can easily store and supply ac current. technician b says dc current is used to power hybrid drive electric motors. who is correct?
Technician B is correct. DC current is used to power hybrid drive electric motors.
The Importance of DC Current in Hybrid Drive Electric MotorsThe modern world is becoming increasingly reliant on electric motors to power a range of different machines and vehicles. Hybrid drive electric motors are a key component of this technology, as they combine the power of an internal combustion engine with the efficiency of an electric motor. These motors are powered by direct current (DC) instead of the alternating current (AC) used in most chassis circuits. In this essay, we will discuss the importance of DC current in hybrid drive electric motors, why it is preferred over AC current, and the advantages that DC current provides in these motors.
The primary reason why DC current is used in hybrid drive electric motors is because it is more efficient than AC current. DC current is able to provide a constant level of power, whereas AC current can fluctuate depending on the voltage. This constant level of power is important for hybrid drive electric motors, as it ensures that the motor can consistently produce the power necessary for its intended application. Furthermore, DC current is able to transfer power more efficiently than AC current, meaning that the motor can use less energy to produce the same amount of power.
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You are the network administrator for a consulting firm. A website that users on your network visit has a habit of frequently changing its IP address. When these IP mappings change, users are unable to connect until you clear the DNS cache. a Which of the following settings should you configure so that the cache does not need to be manually cleared every time? Forward lookup zone Time to live Reverse lookup zone CNAME record
Where you are the network administrator for a consulting firm, and a website that users on your network visit has a habit of frequently changing its IP address. If when these IP mappings change, users are unable to connect until you clear the DNS cache, the settings that you ought to configure so that the cache does not need to be manually cleared every time is: Time to live (Option B)
What is a DNS Cache and why is it important?DNS cache is the temporary caching of information from earlier DNS lookups on a machine's operating system or web browser.
Keeping a local copy of a DNS query helps your operating system or browser to obtain it fast, allowing a website's URL to be resolved to its matching IP address much more effectively.
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the switching valves on the air pump have failed several times. technician a says that a defective exhaust check valve could be the cause. technician b says that a leaking exhaust system at the muffler could be the cause. which technician is correct?
Correct, the technician a claims that a broken exhaust check valve may be to blame.
Which of the following air system valves has a purpose to stop exhaust gases from entering the air pump?makes sure that hot exhaust gases don't back up into the hoses and the pump. Air is distributed to each cylinder by an air manifold. Air Nozzles - Placed next to the exhaust valves, they inject air into each exhaust route. The diverter valve is activated by the manifold vacuum signal line, which detects manifold vacuum.
The PCV valve and SAI system regulate what exhaust emissions?The fumes from the crankcase are controlled back into the intake system by positive crankcase ventilation (PCV) systems using a valve or fixed aperture. Depending on engine vacuum, a PCV valve controls how much fumes are released.
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A country needs to build new power plants to meet
the increasing demand for electric power. One possibility is
to build coal-fired power plants, which cost $1300 per kW
to construct and have an efficiency of 40 percent. Another
possibility is to build clean-burning Integrated Gasification
Combined Cycle (IGCC) plants where the coal is subjected to
heat and pressure to gasify it while removing sulfur and particulate matter from it. The gaseous coal is then burned in a
gas turbine, and part of the waste heat from the exhaust gases
is recovered to generate steam for the steam turbine. The construction of IGCC plants costs about $1500 per kW, but their
efficiency is about 48 percent. The average heating value of
the coal is about 28,000,000 kJ per ton (that is, 28,000,000 kJ
of heat is released when 1 ton of coal is burned). If the IGCC
plant is to recover its cost difference from fuel savings in five
years, determine what the price of coal should be in $ per ton.
Answer:
To determine the price of coal that would allow the IGCC plant to recover its cost difference from fuel savings in five years, we first need to calculate the cost savings of the IGCC plant compared to the coal-fired power plant. The IGCC plant costs $1500 per kW to construct and has an efficiency of 48 percent, while the coal-fired power plant costs $1300 per kW to construct and has an efficiency of 40 percent. The cost savings of the IGCC plant can be calculated as follows:
$1500/kW - $1300/kW = $200/kW
We can then calculate the total cost savings of the IGCC plant over a five-year period by multiplying the cost savings per kW by the total number of kW the plant will generate in five years. For this calculation, we will assume that the plant will generate 1,000 kW of power.
$200/kW * 1000 kW = $200000
Next, we need to calculate the amount of coal that the IGCC plant would need to burn over a five-year period to generate 1,000 kW of power. We know that the average heating value of coal is 28,000,000 kJ per ton, and that the efficiency of the IGCC plant is 48 percent. We can calculate the amount of coal the IGCC plant would need to burn as follows:
1,000 kW / (28,000,000 kJ/ton * 0.48) = 10.7 tons
Finally, we can calculate the price of coal that would allow the IGCC plant to recover its cost difference from fuel savings in five years by dividing the total cost savings by the amount of coal the plant would need to burn over the same period.
$200000 / 10.7 tons = $18,661.04/ton
Therefore, the price of coal that would allow the IGCC plant to recover its cost difference from fuel savings in five years is $18,661.04/ton.
robocell allows you to move the robot in directions that exceed its actual working space since it is simulation software and does not have to accurately reflect reality. True or False
False, Since robocell is simulation software and doesn't need to accurately represent reality, you are free to move the robot beyond its actual working area.
What is RoboCell?
RoboCell integrates ScorBase's robotic control software with interactive 3D solid modeling simulation software. RoboCell's virtual robots and devices accurately replicate the actual dimensions and functions of Intelitek Robotic equipment.
What is the degree of freedom in robotics?
Degrees of freedom in robotics. The term degrees of freedom is widely used to define the motion capabilities of robots, including androids (humanoid robots). In this context, the term generally refers to the number of joints or axes of motion on the robot.
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a six pulse scr controlled rectifier is supplied with 13.8 kv from a 1 mva transformer. the transformer is connected wye-wye and its reactance is 10%. the transformer secondary is rated 6000 v. the rectifier load is 900 kw (dc) at 7600 v. estimate the supply current component at 300 hz on the transformer high side.
The supply current component at 300 Hz on the transformer high side is 0.0591A.
What is transformer?
A transformer is indeed a passive part that moves electrical energy between circuits, whether they be single circuits or multiple circuits. The electromotive force (EMF) across all other coils pierced around the same core changes in response to changes in the current flowing through any one of the transformer's coils, which causes changes in the magnetic flux with in transformer's core. Without a metallic (conductive) connecting the two circuits, electrical energy can be transmitted between different coils. The 1831 discovery of Faraday's law of induction defines the voltages effect in any coil as the result of a fluctuating magnetic flux surrounding the coil.
The supply current component at 300 Hz on the transformer high side can be estimated as follows:
1. Calculate the total current drawn by the rectifier load:
The total current drawn by the rectifier load is calculated as follows:
Iload = Pload/Vdc = 900kW/7600V = 118.18 A
2. Calculate the total transformer secondary current:
The total transformer secondary current is calculated as follows:|
Isec = Iload/KVA = 118.18A/1MVA = 0.11818 A
3. Calculate the transformer primary current:
The transformer primary current is calculated as follows:
Ipri = Isec * (Vpri/Vsec) * (1 + X/100) = 0.11818A * (13.8kV/6kV) * (1 + 10/100) = 0.3545 A
4. Calculate the supply current component at 300 Hz on the transformer high side:
The supply current component at 300 Hz on the transformer high side is calculated as follows:
Isupply = Ipri/6 = 0.3545A/6 = 0.0591 A
Therefore, the supply current component at 300 Hz on the transformer high side is 0.0591A.
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an allocator using the best fit algorithm may have external fragmentation, but will have no internal fragmentation. True or False
This is a true statement because an allocator that uses the best-fit algorithm may have external fragmentation but does not have internal fragmentation.
The best-fit algorithm deals with allocating the smallest free partition that meets the criteria of the requesting process. The best-fit algorithm first searches the whole list of free partitions and considers the smallest hole that is adequate. It then attempts to identify a hole that is close to the actual process size required.
Using the best-fit algorithm provides the solution to internal fragmentation. Whereas this algorithm does not provide the solution to external fragmentation; compaction, segmentation, and paging are the required solutions to external fragmentation.
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In IPv4, datagram fragment might be fragmented again at the next router. Re-assembly of these sub-fragments is handled by:
A. the first router that has an MTU big enough to handle the re-assembled fragment
B. every router visited on the path through the internet core
C. the last router before the destination host
D. the destination host
E. none of these
In IPv4, a fragmented datagram could be fragmented once more at the following router. Re-assembly of these semi is handled by destination host.
Describe the router.
Among computer systems, a gateway is a network device that forwards data packets. Across networks and on the worldwide Internet, router handle traffic steering. Data delivered via a network, like an email or a website link, is transmitted in the form of packets of information. In way to attain its destination node, a packet is typically passed through one router to some other routers over the networks that make up an online connection (such as the Internet).
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How is a technological system MOST like a society?
T/F it is possible to create a while loop that determines when the end of a file has been reached.
Answer:
True
Explanation:
if datafile is an ifstream object associated with a disk file name payrates.dat, which of the following statements would read a value from the file and place it in the hourlypay variable?
An hourly wage is the most common type of variable remuneration given to employees. For each hour worked, a company gives the employee a standard wage. The amount paid hourly to each employee varies based on an employee's knowledge, skills, and abilities.
Variable pay, often known as incentive pay or commission, is a means to compensate employees in addition to the number of hours they put in and motivate them to achieve goals. Either a fixed percentage (such as 5% of sales), or a fixed money amount (such as $100 every quarter), might be used. The percentage of sales remuneration based on employee performance is known as variable pay. Variable compensation is given as a form of bonus, incentive pay, or commission when workers achieve their objectives. Contrarily, base pay is set and given regardless of whether employees achieve their objectives. Because employees may stay loyal to a present company if they may raise their wages through a high performance rate or excellent project results, variable compensation can also aid in boosting staff retention.
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Based on the following configuration, what would be the assigned global unicast address ?
interface fastEthernet 0/0
mac-address 0200.8395.2614
ipv6 address 2500:A4B3:ED81:ACEB::/64 eui-64
A. 2500:A4B3:ED81:ACEB: 200:83FF:FF95:2614
B. 2500:A4B3:ED81:ACEB: 0:83FF:FE95:2614
C. 2500:A4B3:ED81:ACEB: 200:83FF:FE95:2614
D. 2500:A4B3:ED81:ACEB: 0:83FF:FF95:2614
The correct answer is A. 2500:A4B3:ED81:ACEB: 200:83FF:FF95:2614 would be the assigned global unicast address .
Launch the command prompt. Open the Start menu in Windows 10 and type "cmd" into the search bar. Ipconfig /all. Type this command and hit Enter. To view the MAC address of the network device, choose Physical Address. While Link-local IPv6 Address displays the IPv6 address, IPv4 Address is presented next to it. An IPv6 device will create a distinct 64-bit interface ID using the MAC address of its interface. The interface ID is 64 bits while a MAC address is 48 bits. The Internet's global unicast address is exclusive worldwide. A global unicast address is what the example IPv6 address from Prefixes in IPv6 looks like.
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Behavioral scientists have created models that identify how managers work today. Based on their observations, researchers offer a set of five management attributes. Which of the following conditions apply to management at the present time? More than one answer may be correct. Check All That Apply fast-paced work fragmented activities currency of information low technology knowledge
The statement claims that fragmented hobbies and fast-paced labor are the best choices.
What's a short way to define technology?Technology, or as it is sometimes referred to, the modification and manipulation of both the human environment, is the implementation of scientific understanding to the practical goals of human existence.
Briefing:"A fast-paced company is a place where things move quickly and remain active throughout the day. Throughout the workweek, there are almost never great prospects for relaxing moments, and employees frequently switch between tasks without a moment's notice ".
With reference to the usage of ICT, the concept of discontinuity corresponds to how workouts are spatially and temporally arranged by dividing exercises into some more manageable sections that are afterwards completed at various times and locations.
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water flows at a rate of 0.9 m3/s in a 2.5 m wide channel as shown. at a particular section, the flow depth is 1.2 m. a. what would be the flow depth over a bump of height 0.1 m installed just downstream of this section? b. what is the maximum elevation of the bump that could be installed without backing/ choking the flow (hint: look for ec in y-e diagram)
The depths immediately upstream and downstream of the lowered segment, or normal depth, are those in the approach flow.
The amount of water that might theoretically flow out of your kitchen faucet or bathtub each minute is measured by your water flow rate, sometimes referred to as your gallons per minute (GPM).
Assuming your flow rate is currently standard, your home will never need to exceed that final GPM unless you intend to build more kitchens, bathrooms, or laundry rooms. The typical residential water flow rate for small homes is between 6 and 12 gallons per minute.
Add the average breadth (in m), the average depth (in m), and the average water velocity (in m/s) together to get the water flow (in m3) (in m). Water flow equals 0.255 m3/s (0.425 m/s x 1 m x 0.6 m).
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59. Water Power Corporation wants to begin operations that include the discharge of waste into navigable waters. Under the Clean Water Act, the company must install certain equipment a. with all deliberate speed after beginning operations. b. before beginning operations. c. only on a voluntary basis. d. only if a regulatory agency challenges the discharge.
The goal of the Water Power Corporation is to start operations that involve dumping waste into navigable waters. The business is required by the Clean Water Act to install specific machinery. before beginning operations.
What is operation?
Operation is the process of carrying out or performing a task or set of tasks. It is the execution of a plan or an action. Operations involve working with people, equipment, or technology to manage resources and create goods and services. Operations are essential to any organization, regardless of its size or type. They can range from simple tasks such as phone calls and mailings to complex tasks such as manufacturing parts and shipping them to customers. Operations are at the heart of any company’s success; they are the lifeblood of any business. They encompass the entire process from initial planning and design through production and quality control to the delivery of goods and services. Operations are responsible for ensuring that all aspects of the organization, from financial management to customer service, are running smoothly.
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when an outlet supplied through an underfloor raceway is removed, the sections of the circuit conductors supplying the outlet shall be removed from the raceway. t or f
True, the circuit conductor parts supplying the outlet must be taken out of a cellular metal floor raceway when an outlet is removed from it.
Cellular metals' characteristic property profile reveals a variety of uses, particularly in multifunctional technologies. Their particular property characteristics point to applications as heat dissipation medium, lightweight panels/shells, energy-absorbing structures, and vibration control. Cellular metals' characteristic property profile reveals a variety of uses, particularly in multifunctional technologies. Their particular property characteristics point to applications as heat dissipation medium, lightweight panels/shells, energy-absorbing structures, and vibration control. There are links between cellular architecture, cell morphology, and density and the characteristics that control these performance advantages. Such structural relationships make it easier to select the best cell properties for specific multifunctional applications.
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consider the following table exam results: which sql statement sdo we use to find out how many students took each exam g
The following table exam results:
SELECT Exam, COUNT(*)
FROM ExamResults
GROUP BY Exam;
What is table?
Table is a data structure in computer science that organizes data in rows and columns. It is used to store and manipulate data in a structured format. Tables can be used to store and organize text, numbers, images, and other data. Tables can be used to store and organize data for various purposes such as data analysis, data visualization, and data retrieval. Tables are used in relational databases to store and manage data, as well as in spreadsheets to create graphs and charts. Tables are an essential component of data processing in a computer system and are used in many areas of computing including web development, data science, and software engineering. Tables provide a way to organize and display data in an organized and efficient manner. Tables are used in many applications including web browsers, databases, spreadsheets, and other data processing applications.
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on a linux system using rpm for package management, which of the following commands would you use to search online repositories for an available firefox package?
On a Linux system using rpm for package management, the commands that you would use to search online repositories for an available firefox package is option b. yum search firefox.
How to update Firefox using yum?We can upgrade Firefox without even opening the browser; all we need to do is launch the Linux terminal and issue the yum update command. Now, the most recent version of Firefox will be installed. And in the following distributions, this also functions.
An open source operating system is Linux (OS). A system's hardware and resources, such as the CPU, memory, and storage, are directly managed by an operating system, which is a piece of software. The OS establishes links between all of your software and the working physical resources by sitting in between apps and hardware.
Therefore, An interactive package manager built on the rpm format is yum. Based on "repository" metadata, it can automatically carry out system upgrades, such as dependency analysis and outdated processing.
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See full question below
On a Linux system using RPM for package management, which of the following commands would you use to search online repositories for an available Firefox package?
a. apt search firefox
b. yum search firefox
c. rpm -s firefox
d. apt-get search firefox
the standard abs control strategy uses a three step cycle. these are . group of answer choices
The standard ABS control strategy uses a three step cycle. These are pressure hold, pressure deceases and pressure increases.
What is ABS?ABS stands for anti-lock braking system. It is defined as a safety anti-skid braking system that is applied to buses, lorries, cars, and motorbikes as well as to aircraft. Its goal is to protect the driver by ensuring that the wheels don't lock up when you apply the brakes.
ABS works by keeping the wheels from locking up when braking, maintaining tractive contact with the road, and giving the driver more control over the vehicle.
Thus, the standard ABS control strategy uses a three step cycle. These are pressure hold, pressure deceases and pressure increases.
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Your question is incomplete, but probably your complete question was
The standard abs control strategy uses a three step cycle. these are . group of answer choices'
Pressure hold,
Pressure deceases
Pressure increases
Pressure doesnot change.
When performing load calculations for farm buildings, the load that must be included in the calculation at 100% demand must be at least _____.
The correct answer is 60A for farm buildings, the load that must be included in the calculation at 100%.
Add the rated voltage to the size of the breaker. A 20 amp breaker, for instance, will have a maximum load of 2400 watts while running at 120 volts (20 amps x 120 volts). Lighting loads for residential units are often not regarded as continuous loads for calculation purposes. Some loads in home wiring would need to be computed at 125 percent of the entire load and should be treated as continuous loads. You must determine the load weight if it has not been specified; otherwise, it has not been supplied. Use the following formula to calculate the volume of the load and the materials that make it up: load weight = weight per volume * total volume.
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When assisting users, a technician often uses the Mac OS Force Quit functions and the Linux kill command.
Which of the following situations would require their use?
a. A user accidentally sends a large job to a printer.
b. A runaway application does not respond to user input.
c. The operating system needs to be rebooted.
d. A remote desktop connection needs to be closed.
The situations that require to use Mac OS Force Quit functions and Linux kill command is a runaway application does not respond to user input.
What is Mac OS Force Quit and Linux kill command?Mac OS Force Quit is the built-in function in the Mac operating system to close the application that unresponsive, so we doesn't have to wait for application to respond to close it. It can be done with press Option (or Alt), Command, Esc (Escape) together.
Linux kill command is the built-in command in the Linux operating system to terminate program manually including the application that unresponsive.
Force Quit and kill command only can close the program or application, so option a, b, and c cannot use these function or command.
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in class you learned that when streamlines curve there is a pressure gradient: the pressure is always higher on the outside of the curve. why is that so
The pressure is always higher on the outside of the curve because this side will push the flow and make a curve.
What is streamlines curve?Streamlines curve is a streamline that have shape like curve. Streamlines curve can created because there is a pressure gradient in different level, if the pressure gradient doesn't have different level it will continue streamline and create straight line not a curve.
The higher level of pressure gradient that make streamline curve will push the flow into one side and create the opposite of curve direction which is been called as outside of the curve. Because of this, wherever the higher level of pressure is located it will push the flow and make curve and that position will be outside of the curve.
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in a circuit, a voltage uo in the s-domain, i.e. vo (s), is given by: a) by examining just, the roots of the denominator what conclusions can you draw about the voltage uo (t) for t > 0. b) what would be the steady state value of the voltage uo (t) for t >> 0. c) use an inverse laplace transform and determine the expression of uo (t) in the time domain for t>0. d) plot the expression of uo (t) in the time domain for t>0. e) are your answers from part (a) and (b) agree in agreement with the plot in part (d).
The term "voltage divider" refers to a very popular and practical series resistor circuit. You will understand the origin of the moniker once we have figured out how this circuit functions.
Assume the divider is discharging 0000 current. (Before we are finished, we will investigate what would occur if this zero-current assumption were false.)
The bottom resistor is divided by the total number of resistors, scaling the input voltage to equal the output voltage.
For whatever value of textR1R1start text, R, 1, end text and textR2R2start text, R, 2, end text, the ratio of resistors is always less than 111. Because of this, v out v out v, start subscript, o, u, t, and end subscript are always smaller than v in v in v, start subscript, I and n, respectively. The input voltage is scaled down to v outv out v, start subscript, o, u, t, end subscript from v inv in v, start subscript, I n, and end subscript.
By a predetermined ratio set by the resistor values: v, start subscript, o, u, t, end subscript. The circuit is known as a voltage divider because of this.
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A strip footing 2.5 m wide is loaded on the ground surface with a pressure equal to 175 kPa. Calculate the stress distribution at depths of 2.5, 7.5 and 12.5 m under the center of the footing. If the footing rested on a normally consolidated cohesive layer whose Cc was 0.612 and whose e0 was 1.35 , estimate the settlement of the footing. Assume S = 100%,γ’ = 7.5 kN/m3 , and the total clay layer thickness beneath the footing = 15 m.
A Caterpillar D11R will have little trouble removing this material because the upper stratum has a low seismic wave velocity of 2,000 ft/sec (600 m/sec). 41 feet (12 m) (12 m)
V2 = (300 feet)/(0.07 0.04) = 10,000 feet per second (3,000 m per second)
Calculating the trip time at the intersection of the straight line segments V1 and V2: Travel time is calculated as 0.04 + (100)/10,000 ft/sec = 0.05 sec.
V1 = 2,000 ft/sec (600 m/s) = 100 ft/0.05 sec
sin = V1/V2, which is equal to 2,000/10,000 = 0.2, or = 11.5°
H1 is equal to [(T1V1)/(2cos )] = [(0.04)(2,000)] 41 feet /(2 cos 11.5°) (12 m)
Using the equation below to check, where d′=100 feet (30.5 m)
H1 equals 12 d′ [(V2 V1)/(V2 + V1)].
½ = ½ (100) [(10,000 − 2,000)/ (10,000 + 2,000)]
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g describe the process of generating power from hydroelectric power. explain in detail how the dam in a hydropower help obtain energy and how it is converted before reaching your home to be consumed as electricity.
The process of hydroelectric power generation is water turning the turbine which creates kinetic energy electricity conversion in the powerhouse which then transferred to the transformers and then distributed to the power lines.
Hydroelectric power works by water moving through a downstream hole in the dam rotating the turbine creating an energy called kinetic energy, and then the kinetic energy resulted from the turbine rotation is converted into electricity in the generator powerhouse which will then be transferred to the transformer which then is distributed to the electrical power lines which will then be distributed to homes and buildings across the city.
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which of the following statements about steel cable construction, first used to build the brooklyn bridge, is not true?
Made Possible by Steel Roebling is credited with the genius idea of using twisted steel to build the bridge
What is Brooklyn bridge ?The Brooklyn Bridge, which connects the boroughs of Manhattan and Brooklyn across the East River in New York City, is a hybrid cable-stayed/suspension bridge. The Brooklyn Bridge, which first fixedly crossed the East River on May 24, 1883, was built. At the time of its opening, it was also the longest suspension bridge in the world, measuring 1,595.5 feet (486.3 metres) in length with a deck that was 127 feet (38.7 metres) above mean high water. The Brooklyn Bridge was formally renamed in 1915 from its previous names of the New York and Brooklyn Bridge or the East River Bridge.Early in the 19th century, plans for a bridge linking Manhattan and Brooklyn were originally floated, eventually leading to the buildingTo learn more about Brooklyn bridge refer to:
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. before taking a bite of a piece of hot pizza you blow on it to cool it what mode of heat transfer are you using in this situation group of answer choices radiation convection specialized transfer conduction
Assuming before taking a bite of a piece of hot pizza, you blow on it to cool it, the mode of heat transfer that you are using in this situation is: B. convection.
What are the types of heat energy transmission?In Science, there are three (3) main types of heat energy transmission (transfer) and these include the following:
ConductionConvectionRadiationWhat is convection?In Science, convection can be defined as a heat energy transmission (transfer) process which typically involves the transfer of heat, as a result of the movement of mass such as blowing air on a hot pizza in order to make it cool.
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A friend of yours bought several dozen pure silver rings on a recent trip abroad, but now suspects
that they might not be all that pure. He brings them to you to check. You weigh 10 of the rings and
find that each ring has a mass of 0.738g, you then place them in a graduated cylinder 2.5cm in
diameter and observe that the water level rises by 8.45mm. S.G of pure silver = 10.49
Using chemical engineering concepts, determine if the rings are pure silver.
Answer:
3
Explanation:
To determine if the rings are pure silver, we can calculate the density of the rings and compare it to the density of pure silver. The density of a material is the mass of the material per unit volume.
First, we need to find the volume of one of the rings. Since the rings are cylindrical, we can use the formula for the volume of a cylinder to find the volume of each ring:
V = π * r^2 * h
Where V is the volume of the ring, π is approximately equal to 3.14, r is the radius of the ring, and h is the height of the ring. In this case, the height of the ring is equal to the thickness of the ring, which is equal to the change in the water level (8.45 mm) divided by the number of rings (10). The radius of the ring is equal to half the diameter of the graduated cylinder (2.5 cm / 2 = 1.25 cm), since the rings are placed in the cylinder side by side.
Plugging these values into the formula, we find that the volume of each ring is:
V = 3.14 * (1.25 cm)^2 * (8.45 mm / 10) = 0.00367 cm^3
Next, we can use the mass and volume of each ring to calculate the density of the rings:
density = mass / volume
Since the mass of each ring is 0.738g and the volume of each ring is 0.00367 cm^3, the density of the rings is:
density = 0.738 g / 0.00367 cm^3 = 201.09 g/cm^3
Finally, we can compare the density of the rings to the density of pure silver, which is 10.49 g/cm^3. Since the density of the rings is much higher than the density of pure silver, it is likely that the rings are not pure silver.
It is important to note that this calculation is only an approximate estimation of the purity of the rings. There may be other factors that affect the density of the rings, such as impurities or variations in the thickness of the rings. Additionally, the value of the density of pure silver used in this calculation may not be entirely accurate, as the density of a material can vary depending on factors such as temperature and pressure. A more precise determination of the purity of the rings would require further testing and analysis.
Match arms 2 Points (MARK ALL THAT APPLY) Given the following definition of function g, which choice(s) of match arm below will cause the expression 8 (1. 2. 3):: to return the value 2? let g = function I choose one from below*) -> bar 1_ -> -1;; (bar, baz, foo) (foo, bar, baz) (baz, foo, bar) (bar, (bar, O bar, - 06bar) (foo, bar, (foo, -, baz) O bar, baz) None of the above
The new function we obtain by performing f first and then g is the composite of two functions, g and f. The composition of g with f is known as gf and is calculated as gf(x) = g(f(x)), for instance, if f is the function denoted by f(x) = x2 and g is the function denoted by g(x) = x + 3.
A composite function called f of g of x is denoted by the notation f(g(x)) (or) (f g) (x). In order to find f(g(x)), replace f with g(x) (x). Find the domains of the inner function g(x) and the resulting function f(g(x)) before computing the intersection to determine the domain of f(g(x)). The function f with g has the notation (fg)(x)=f(g(x)) and is interpreted as f of g of x. It signifies that the function g(x) is substituted for every instance of an x in the function f. The set of all x in the domain of g such that g(x) is in the domain of f is the domain of fg.
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True or False. On Ethernet networks, the hexadecimal address FF-FF-FF-FF-FF-FF represents the broadcast MAC address.
True. The broadcast MAC address on Ethernet networks is FF-FF-FF-FF-FF-FF, which is used to send data to all nodes on the network.
Broadcast MAC Address on Ethernet NetworksThis address is a special address that is used when a device needs to broadcast data to every node on the local network. This is an important function in networks, allowing devices to communicate with each other no matter their physical location. It is also used in Address Resolution Protocol (ARP), a protocol that allows a device to discover the MAC address associated with a given IP address.
The broadcast MAC address is a vital part of Ethernet networks, as it helps keep the network running smoothly and efficiently by allowing devices to communicate with each other without the need for manual configuration.
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