A non metallic cable shall be secure at intervals not exceeding 4.5 feet and within 12 inches of the box to protect the cable and ensure proper support for electrical connections, as specified in section 334.30 of the National Electrical Code.
The metals loses electrons forming cations while on the other hand, the non-metals gains the electrons forming anions.
Covalent bonding is a type of bonding linking two non-metallic atoms which are distinguished by the sharing of pairs of electrons joining atoms and other covalent bonds. An ionic bond is the force of appeal that holds together positive and negative ions. It forms when atoms of a metallic element loses electrons to atoms of a nonmetallic element. Ionic bonds form only allying metals and nonmetals. When two nonmetals bond, they share pairs of electrons in a covalent bond and both gets stability.
So w can conclude that A covalent bond is formed between two non-metals. The sharing of electron pairs takes place between their atoms and a covalent bond is formed.
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Determine the longitudinal modulus E, and the
longitudinal tensile strength F,, of a unidirectional
carbon/epoxy composite with the properties
The longitudinal modulus is 177.25GPa .
The longitudinal tensile strength is 2640GPa .
How to calculate the valueThe expression for longitudinal tensile strength is used to calculate the value of longitudinal tensile strength for the provided composite.
The values of longitudinal fiber strength, elastic modulus of fiber and elastic modulus for matrix are substituted in the expression to get the final answer.
The longitudinal modulus is:
= 245(0.65) + 70(0.35)
=177.25GPa .
The longitudinal tensile strength is:
= 3500(0.65 + 70/235 0.35)
= 2640GPa .
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Counters are similar to timers, that except that they do not operate on an internal clock. true/false
Where flexible tubing is used to enclose the conductors, the tubing shall extend from the last insulating to not less than _________ inches.
314.18(c)
Where flexible tubing is used to enclose the conductors, the tubing shall extend from the last insulating to not less than 6 inches. This requirement is stated in section 314.18(c) of the National Electrical Code (NEC).
Electricity can flow through metals, molten ionic compounds, and electrolyte solutions.
The letters that complete the gaps are;
Non-conductor conductor other than conductorsNon-conductor conductorsConductor DecreasesConductorsBecause there are available free electrons within metals, they act as conductors.
An ionic solid is not a conductor because the ions, which are the charge carriers, are tied together in the lattice.
The crystal breaks apart in the molten state, releasing its ions. The molten ionic material is a conductor as a result.
Because mobile ions are charge carriers in solution, electrolyte solutions like HCl transmit electricity. The number of ions in the solution reduces as the solution's concentration rises.
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A TOF timer starts to accumulate time when the rung makes a true to false transition transition. true/false
The statement "A TOF timer starts to accumulate time when the rung makes a true to false transition" is true because TOF (Timer Off-Delay) is a type of timer used in PLC (Programmable Logic Controller) programming.
It is designed to begin timing when the input condition transitions from true to false. When the rung condition is true, the timer's accumulated value remains at zero. Once the rung condition transitions to false, the timer starts accumulating time.
During the timing process, the timer's output remains active or true until the preset time has elapsed. After the preset time is reached, the timer's output deactivates or becomes false. This behavior allows the TOF timer to be used for various control applications, such as maintaining an output active for a specific duration after an input signal ceases.
In summary, a TOF timer begins to accumulate time when the rung makes a true-to-false transition, and its output remains active until the preset time has elapsed. This functionality is essential for precise control in many industrial automation processes.
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(348-30(A)(Exp 3) 3/8 inch flexible metal conduit used for the supply to recessed lighting fixtures must have the raceway secured every _____ feet.
According to NEC (National Electrical Code) 348-30(A)(Exp 3), 3/8 inch flexible metal conduit used for the supply to recessed lighting fixtures must have the raceway secured every 4 1/2 feet.
For 3/8 inch flexible metal conduit (FMC) used for the supply to recessed lighting fixtures, the raceway must be secured every 4 feet, as per NEC 348-30(A)(Exp 3).There is no direct reference to section 358-2(A)(B) in the National Electric Code (NEC). However, Section 358.12(A)(1) specifies that the trade size of electrical metallic tubing (EMT) shall be from 1/2 inch to 4 inches in diameter. This is the general rule for EMT, with some exceptions for special installations, as noted in other sections of the NEC.
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Compute the first three natural frequencies and the corresponding mode shapes of the transverse vibrations of a uniform beam of rectangular cross section (100 mm times 300 mm) with 1 = 2 m, E = 20. 5 times 10^10 N/m^2, and p = 7. 83 times 10^3 kg/m^3 for the following cases: (a) when both ends are simply supported; (b) when both ends are built-in (clamped); when one end is fixed and the other end is free; and (d) when both ends are free. Plot the mode shapes
The value when both ends are free isd) Free-Free: f1 = 0 Hz, f2 = 16.08 Hz, f3 = 36.19 Hz
Mode shapes: sin(npix/(2L))
How to solveTo calculate these values, use the following formulas:
f = (1/(2pi)) * sqrt((B^2EI)/(rhoAL^4))
B = pi*n/L
(a) Simply Supported:
f1 = 8.04 Hz, f2 = 32.17 Hz, f3 = 72.38 Hz
Mode shapes: sine (npix/L)
(b) Clamped Ends:
f1 = 20.42 Hz, f2 = 81.67 Hz, f3 = 183.92 Hz
Mode shapes: cosh(Bx)-cos(Bx)
(c) Fixed-Free:
f1 = 5.25 Hz, f2 = 20.98 Hz, f3 = 47.22 Hz
Mode shapes: sin(Bx)
(d) Free-Free:
f1 = 0 Hz, f2 = 16.08 Hz, f3 = 36.19 Hz
Mode shapes: sin(npix/(2L))
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What type of firewall security feature limits the volume of traffic from individual hosts?A. Loop protectionB. Network separationC. Stateful inspectionD. Flood guard
The firewall security feature that limits the volume of traffic from individual hosts is called "Flood guard".
This feature is used to prevent denial of service attacks by limiting the amount of traffic that can be sent from a particular host to the network. Stateful inspection is a firewall security feature that examines the traffic and keeps track of the state of each connection.
Loop protection is used to prevent network loops by disabling a port when a loop is detected. Network separation is a security feature that isolates different parts of the network to prevent unauthorized access. The firewall security feature that limits the volume of traffic from individual hosts is D. Flood guard.
Flood guard is designed to prevent excessive traffic or Denial of Service (DoS) attacks by limiting the volume of traffic from individual hosts. This feature helps maintain the stability and security of a network.
Note: While the terms "loop," "stateful," and "firewall" are relevant to network security, they are not directly associated with the specific security feature that limits traffic volume from individual hosts as mentioned in the question.
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B-12.5 mix can be substituted for what?
Concrete mix with a 2500 psi (pounds per square inch) compressive strength requirement can be replaced with a B-12.5 mix.
A particular kind of concrete mix known as B-12.5 mix is frequently used for modest homes or commercial constructions including sidewalks, patios, and driveways. With a compressive strength of around 1200 psi, it is a blend of Portland cement, sand, and aggregate. In general, a concrete mix's compressive strength plays a significant role in evaluating whether or not it is appropriate for a certain project. For applications with lesser load-bearing needs, a blend with a lower compressive strength, such as B-12.5, is appropriate. Building foundations, bridges, and roads are examples of constructions that might benefit from a mix with higher compressive strength, such as 2500 psi. Therefore, the B-12.5 mix cannot be utilized as a replacement if the project's required compressive strength is 2500 psi since it does not fulfill the strength standard.
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Refer to the exhibit. The network administrator enters these commands into the R1 router:R1# copy running-config tftpAddress or name of remote host [ ]?When the router prompts for an address or remote host name, what IP address should the administrator enter at the prompt?
When the router prompts for an address or remote host name, the network administrator should enter the IP address of the TFTP server where they want to store the running-config file. This IP address will depend on the specific network setup and the location of the TFTP server within that network.
A Windows Server is a type of operating system designed by Microsoft specifically for use on servers. It provides a wide range of features and capabilities that allow organizations to manage and control their network infrastructure, applications, and data.
Windows Server operating systems offer a variety of services, such as file and print sharing, web hosting, email services, remote host access, and virtualization. They are designed to be scalable, reliable, and secure, making them ideal for use in enterprise environments.
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Nonmetallic-sheathed cable shall be secured by staples, cable ties, straps, hangers, or similar fitting at intervals not exceeding ______ feet and within _______ inches of every cabnet, box or fitting. 334.30
Nonmetallic-sheathed cable shall be secured by staples, cable ties, straps, hangers, or similar fitting at intervals not exceeding 4 1/2 feet and within 12 inches of every cabinet, box, or fitting according to section 334.30 of the National Electrical Code.
NM cable was invented by the Romex company in 1922 and was first described and listed by the NEC (National Electrical Code) in 1926, but it did not come into prevalent use until the early 1960s when plastics replaced woven rayon as the material used for the outer sheathing. From that point forward, NM cable became the standard for running residential electrical wiring in hidden locations, within walls, and in floor and ceiling cavities. Today, NM cable is the standard for nearly all applications—other than in exposed locations such as against basement walls or along exposed exterior walls, where conduit is still the standard.
Its popularity stems from the fact that NM cable is very easy to use and fairly inexpensive when compared to other methods of running wire, such as metal conduit or armored cable.
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5152 - Load factor is the lift generated by the wings of an aircraft at any given time:- Divided by the total weight of the aircraft- Multiplied by the total weight of the aircraft- Divided by the basic empty weight of the aircraft
The correct answer to your question is: Load factor is the factor by which the total weight of the aircraft is multiplied to determine the amount of lift generated by the wings at any given time. This factor is calculated by dividing the total weight of the aircraft by the basic empty weight of the aircraft.
Load factor is the ratio of the total lift generated by an aircraft to its gross weight. In other words, it is the ratio between the total airload imposed on the wing and the gross weight of the aircraft in flight. It is usually expressed as a multiple of the aircraft's weight. For example, a load factor of 2G means that the total lift generated by the wings is twice the weight of the aircraft.
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(370-2) Cablebus is ordinarily assembled at the _____.
(370-2) Cablebus is ordinarily assembled at the manufacturing plant. Manufacturing overhead does not include the depreciation on delivery trucks, but it does include all other possibilities that are still available.
Delivery truck depreciation is not included in the costs associated with making computers. Manufacturing plant overhead, also known as factory burden, factory overhead, or production overhead, is the umbrella term for all costs associated with manufacturing, including electricity costs, costs for factory supplies and indirect labour, rent, insurance, costs for heating, water, and other forms of energy, salaries, and expenses for cleaning, oiling, lubricating, servicing, and repairs.
Manufacturing overhead does not include the depreciation on delivery trucks, but it does include all other possibilities that are still available.
The total of all indirect material, labour, and other costs that are not directly related to the goods and units produced at a manufacturing facility is manufacturing overhead. These are equally distributed to each generated unit.
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22) An example of an important physical site characteristic is a...A) Major airportB) Grid street patternC) Major central parkD) Natural harbor
An example of an important physical site characteristic is a: D) Natural harbor
What is the physical site characteristic?The physical characteristics of a place, such as its terrain, soil, vegetation, latitude, and elevation, are referred to as its "site." The circumstance is the position of one place in respect to another.
Geographers usually describe a place using both natural and human factors. The physical elements of a location that are produced by geological, hydrological, atmospheric, and biological processes make up that area's natural environment.
A natural harbor is defined as a landform where a section of a body of water is protected and deep enough to allow anchorage.
Thus, it is the only option that is an important physical characteristic as the others can't be described as physical site characteristic.
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6) In which situation would the auditor be choosing between "except for" qualified opinion and an adverse opinion?
A) The auditor lacks independence.
B) A client-imposed scope limitation
C) A circumstance-imposed scope limitation
D) Lack of full disclosure within the footnotes
In the situation where there is a lack of full disclosure within the footnotes (D), the auditor would be choosing between an "except for" qualified opinion and an adverse opinion. This is because the limitation in disclosure might be material and pervasive, impacting the financial statements' overall accuracy and fairness.
The situation in which the auditor would be choosing between an "except for" qualified opinion and an adverse opinion is when there is a client-imposed scope limitation or a circumstance-imposed scope limitation. In these situations, the auditor may not be able to gather enough evidence to form an unqualified opinion, but the limitation does not rise to the level of requiring an adverse opinion. It is important to note that a lack of independence or lack of full disclosure within the footnotes would not necessarily lead to this decision.
If the issue is isolated and not pervasive, the auditor would issue a qualified opinion; if the problem is pervasive and significantly impacts the financial statements, an adverse opinion would be issued.
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An auxiliary gutter shall not extend a greater distance than __________ beyond the equipment it supplement.
366.12
An auxiliary gutter shall not extend a greater distance than six feet beyond the equipment it supplements. This is in accordance with section 366.12 of the National Electrical Code (NEC).
According to the National Electrical Code (NEC) 366.12, an auxiliary gutter shall not extend a greater distance than 30 feet beyond the equipment it supplements. Physical services used to add connections at substations, distribution centers, substations, and similar points on power lines may be used by electricity users or busbars, but should not be used to house switches, overcurrent devices, or other appliances or equipment.
The cable is designed to protect the cable from environmental contaminants such as dust, dirt, oil, and moisture. Conduit conduits, sometimes called "troughs" or "troughs" in the electrical contracting world, are often used to hold wires in an environment where bacteria can cause a light problem.
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1. When data can flow across the cable in both directions this is known as a what communication?A. EthernetB. SimplexC. CrosstalkD. Duplex
Duplex communication refers to the ability of data to flow across the cable in both directions simultaneously. In duplex communication, two devices can transmit and receive data at the same time, allowing for more efficient and faster communication. Duplex communication can be further classified into two types: half-duplex and full-duplex.
In half-duplex communication, data can flow in both directions, but only one device can transmit data at a time while the other device listens. This type of communication is commonly used in walkie-talkies and two-way radios.
In contrast, full-duplex communication allows both devices to transmit and receive data at the same time without any interruptions. Ethernet communication is an example of full-duplex communication, where data can flow in both directions simultaneously, enabling faster data transfer and improved network performance.
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Which types of communication need a specific data structure to transferring the data?
Certain types of communication require a specific data structure for transferring data. For example, in computer networks, data is typically transmitted using a protocol such as TCP/IP, which requires specific formatting and encoding of data packets.
Similarly, in database management systems, data is typically stored in a specific format such as tables or records, which need to be structured in a specific way for efficient querying and processing. Other examples include messaging protocols such as XML or JSON, which require specific formatting and syntax for transferring data between systems. In general, any type of communication that involves exchanging data between different systems or applications is likely to require some form of specific data structure or protocol for ensuring efficient and accurate transfer of information.
In order to transfer data effectively, certain types of communication require specific data structures. These types of communication include:
1. Network communication: Data is transferred using packet-based structures that contain metadata, such as IP addresses and port numbers.
2. Database communication: Data is organized into tables, rows, and columns using relational or non-relational data structures for efficient querying and storage.
3. API communication: Data is often exchanged using structured formats like JSON or XML to facilitate interoperability between different systems.
4. Message passing in parallel computing: Data is exchanged between processes or threads using data structures like message queues or shared memory.
By using specific data structures in these communication types, data transfer becomes more efficient and reliable.
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Question 51
The Montreal Protocol agrees to control the
a. Use of CFC's
b. Use of all ozone depleting chemicals or substances
c. Production of ozone depleting chemicals or substances
d. Consumption of ozone depleting chemical or substances
The agreement has been successful in reducing the production and consumption of ozone-depleting substances worldwide, and is considered a major milestone in international environmental cooperation.
The correct answer is a. The Montreal Protocol is an international agreement that aims to control and eventually eliminate the use of ozone-depleting chemical substances, such as chlorofluorocarbons (CFCs). It specifically targets the use of CFCs, which are known to have a significant impact on the Earth's ozone layer. The protocol was adopted in response to the growing concern about the negative effects of ozone depletion, which can lead to increased UV radiation and a range of environmental and health problems. The agreement has been successful in reducing the production and consumption of ozone-depleting substances worldwide, and is considered a major milestone in international environmental cooperation.
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Imagine that the Sun gained mass without changing its radius. How would the structure of spacetime change at the distance of Earth's orbit?
The increased mass of the Sun would cause significant changes in the structure of spacetime at the distance of Earth's orbit, affecting the planet's orbit and the passage of time near the Sun.
If the Sun gained mass without changing its radius, the gravitational field around it would become stronger. This would cause the curvature of spacetime to increase, resulting in a deformation of the fabric of space around the Sun.At the distance of Earth's orbit, this increased curvature of spacetime would result in a stronger gravitational force being experienced by the planet. This would cause the planet's orbit to become more elliptical, with a shorter distance between Earth and the Sun at perihelion (the point in the orbit closest to the Sun) and a longer distance at aphelion (the point in the orbit farthest from the Sun).
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What is the primary reason to subnet IPv6 prefixes?
Explanation:
The primary purpose of subnetting IPv6 address space is to improve address allocation efficiency by subnetting a segment of a network address space.
please make me brainalist and keep smiling dude
b) Explain how an isometric scale is used to draw an isometric drawing.
A host PC is attempting to lease an address through DHCP. What message is sent by the server to the client know it is able to use the provided IP information?
This message includes the IP address that has been assigned to the client by the DHCP server, along with other configuration information such as the subnet mask, default gateway, and DNS servers.
When a host PC is attempting to lease an address through DHCP, the server sends a DHCP Acknowledge message to the client to let it know that it is able to use the provided IP information. This message includes the IP address that has been assigned to the client by the DHCP server, along with other configuration information such as the subnet mask, default gateway, and DNS servers. The client can then use this information to configure its network settings and begin communicating on the network.
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Question 48
Lead-based paint may be used for:
a. exterior house paints
b. painting toys
c. painting bridges
d. painting special furniture
Answer:
d.painting special furniture.
Explanation:
Fun fact!
In the 1960s, lead was used to make some kinds of paint - for windows, doors and other woodwork as well as for some metal items, like radiators.
Art director William Golden designed the ______ Television trademark. Describe this trademark.
Art director William Golden designed the iconic CBS Television trademark in 1951. The trademark consists of a simple, elegant eye-shaped design in black and white. The eye, which has become synonymous with CBS, is known as the "CBS Eye" or the "Eye of Providence".
The design was inspired by an actual human eye and Golden sought to create a symbol that would be instantly recognizable and memorable. The shape of the eye is unique, with a sharp, triangular point at the top and a rounded base that curves gently upwards. The black pupil of the eye is surrounded by a thin white ring, which is in turn encircled by a thick black outline. The trademark is timeless in its simplicity and elegance, and has been used consistently by CBS for over 70 years. It has become one of the most recognizable logos in the world of television broadcasting, and is a testament to Golden's skill as a designer. The CBS Eye has become an important part of American culture, and has even been referenced in popular films and TV shows.For such more question on sought
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Except in a casr of a concrete encased driven or buried grounding electrode, the connection of a grounding electrode conductor to a grounding electrode shall be ____________.
250.68(a)
According to the National Electrical Code (NEC) 250.68(a), the connection of a grounding electrode conductor to a grounding electrode shall be made in a manner that will ensure a permanent and low-impedance grounding path.
This means that the connection should be made in a way that ensures good conductivity and does not easily loosen or break over time.
The NEC further specifies that the connection should be made by exothermic welding, listed lugs, listed pressure connectors, listed clamps, or other listed means. These methods of connection ensure a reliable and low-impedance grounding path that can withstand the effects of weather, corrosion, and physical stress.
In the case of a concrete encased driven or buried grounding electrode, the connection should be made by one of the methods listed above, and the grounding electrode conductor should be connected to the electrode by welding, brazing, or by use of a listed clamp that exerts pressure on the electrode.
This ensures a reliable and low-impedance grounding path for the system.
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The use of xray machine or metal detector to determine whether or not a person is bringing unauthorized items into an area is an example of this facility access control:
a. Identification Systems and Methods
b. Methods of Control
c. Entry and Exit Inspection
The use of x ray machine or metal detector to determine whether or not a person is bringing unauthorized items into an area is an example of Entry and Exit Inspection facility access control.
Your question is about the use of an xray machine or metal detector to determine if a person is bringing unauthorized items into an area. This is an example of facility access control known as: c. Entry and Exit Inspection system .
What does a metal detector do?
A metal detector detects metal by creating a magnetic field in it, and the receiver detects that magnetic field while showing its existence. Metal detectors are used in malls, airports, and train stations for screening.
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Type AC cable when run across the top of floor joists, or within _________ feet of floor and across the face of rafters the cable shall be protected.
320.23(a)
When Type AC cable is run across the top of floor joists or within 7 feet of the floor and across the face of rafters, the cable shall be protected according to 320.23(a).
The difference between protection and protect is B. Protection is a noun, while protect is a verb.
A verb simply means an action word. On the other hand, a noun is a name of anything. This can be an animal, place or a thing.
In this case, the difference between protection and protect is that protection is a noun, while protect is a verb.
In the constitutional law of the United States, the penumbra is a category of privileges originating, by definition, from other freedoms specifically covered in the Bill of Rights. In the penumbra of the constitution Connecticut established a right to privacy.
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In older cities across South Africa, infrastructure is deteriorating, including water lines that supply homes and businesses. A report to the Gqeberha municipal council stated that there are on average 30 water line breaks per 100km’s a year in the city. Outside Gqeberha, the number of breaks is 15/km a year
Where the above conditions are given:
A) we can calculate this probability to be approximately 0.1665 or 16.65%.
B) we can calculate this probability to be approximately 0.1612 or 16.12%.
a) Let X be the number of water line breaks in a stretch of 100kks in Gqeberha in a year. We know that X follows a Poisson distribution with λ = 30. To find the probability of 35 or more breaks, we can use the Poisson distribution formula:
P(X ≥ 35) = 1 - P(X < 35) = 1 - Σi=0^34 e^(-30) * 30^i / i!
Using a calculator or software, we can calculate this probability to be approximately 0.1665 or 16.65%.
b) Let Y be the number of water line breaks in a stretch of 100kks outside of Gqeberha in a year. We know that Y follows a Poisson distribution with λ = 15. To find the probability of 12 or fewer breaks, we can again use the Poisson distribution formula:
P(Y ≤ 12) = Σi=0^12 e^(-15) * 15^i / i!
Using a calculator or software, we can calculate this probability to be approximately 0.1612 or 16.12%.
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Full Question:
Although part of your question is missing, you might be referring to this full question:
In Older Cities Across South Africa, Infrastructure Is Deteriorating, Including Water Lines That Supply Homes And Businesses. A Report To The Gqeberha Municipal Council Stated That There Are On Average 30 Water Line Breaks Per 100 ’ A Year In The City. Outside Gqeberha, The Number Of Breaks Is 15/ A Year. A) Find The Probability That In A
In older cities across South Africa, infrastructure is deteriorating, including water lines that supply homes and businesses. A report to the Gqeberha municipal council stated that there are on average 30 water line breaks per 100 ’ a year in the city. Outside Gqeberha, the number of breaks is 15/ a year.
a) Find the probability that in a stretch 100 ’ in Gqeberha there will be 35 or more breaks next year. (3)
b) Find the probability that there will be 12 or fewer breaks in a stretch of 100 ′ outside of Gqeberha next year.
Question 65 Marks: 1 In a dry food storage room, the artificial lighting should provide a minimum ofChoose one answer. a. 10-foot candles b. 50-foot candles c. 100-foot candles d. 3-foot candles
b. 50-foot candles. In a dry food storage room, it is important to have adequate lighting for safety and efficiency purposes. The recommended minimum level of artificial lighting in such a room is 50-foot candles.
Artificial lighting refers to the use of light sources that are created by humans, rather than occurring naturally. These sources of light include incandescent bulbs, fluorescent lamps, and LED lights.
Artificial lighting is used in a wide range of settings, from homes and offices to public spaces such as stadiums and streets. It plays a critical role in modern society, providing illumination for activities that take place after dark or in areas with limited natural light.
However, the use of artificial lighting can also have negative effects on human health and the environment. Overexposure to certain types of artificial lighting can disrupt natural sleep patterns, and the energy consumption required to power artificial lighting can contribute to greenhouse gas emissions and other environmental impacts.
As such, the development of more efficient and sustainable lighting technologies is an important area of research and innovation.
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(590-6(A)(1)) All 125 volt single phase 15, 20 and 30 ampere receptacle outlets in use by personnel for temporary power shall have ground-fault circuit-interrupter protection for personnel.(True/False)
True.An ampere receptacle, also known as an electrical outlet or a power outlet, is a device that provides a point for plugging in electrical equipment.
An ampere receptacle, also known as an electrical outlet, is a device that provides a connection point for an electrical appliance or device to an electrical power source. Ampere receptacles come in various types and sizes, each designed to handle a specific amount of electrical current. The three most common ampere ratings for single-phase receptacles in the US are 15, 20, and 30 amps. Ampere receptacles are typically installed in walls, floors, or ceilings, and can be used for residential, commercial, or industrial applications. Safety features such as ground-fault circuit interrupter (GFCI) protection are required for certain types of ampere receptacles to protect against electrical shock hazards.
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