When a room becomes so hot that everything in it ignites simultaneously it is termed a flashover.
What is a flashover?In a confined space, a flashover occurs when the majority of the directly exposed flammable material ignites almost simultaneously. Certain organic compounds go through thermal decomposition when heated and emit combustible gases as a result.
Every flammable surface exposed to thermal radiation in a compartment or confined space ignites quickly and simultaneously during a flashover, a thermally driven event. For typical combustibles, flashover typically happens when the upper section of the compartment achieves a temperature of about 1,100 °F.
Flashover circumstances are more likely to occur in buildings with hidden compartments, lower ceiling heights, room partitions, and energy-efficient or hurricane windows.
Therefore, the sudden ignition of everything in the room is called a flashover.
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d) The lack of development of nations around the globe is ascribed t o
dishonest or fraudul ent conduct by those in power. With the knowledge you have acquired in this course, you are required t o discuss, situating your
response in the country of your origin, at least five effects of dishonest or
fraudulent conduct by those in power.
One of the solutions that can help to reduce fraudulent conduct by those in power is to hold them accountable.
What is Development?This refers to the process through which an area or region experiences growth and improvement in terms of infrastructure and general well-being.
Hence, we can see that some of the effects of dishonest or fraudulent conduct by those in power are:
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Both copper and stainless steel are being considered as a wall material for a liquid cooled rocket nozzle. The cooled exterior of the wall is maintained at 150°C, while the combustion gases within the nozzle are at 2750°C. The gas side heat transfer coefficient is known to be hᵢ = 2×10⁴ W/m²-K, and the radius of the nozzle is much larger than the wall thickness. Thermal limitations dictate that the temperature of copper must not exceed 540°C, while that of the steel must not exceed 980°C. What is the maximum wall thickness that could be employed for each of the two materials? For Cu, ρ = 8933 kg/m³, k = 378 W/m-K and for stainless steel, ρ = 7900 kg/m³, k = 23.2 W/m-K
a. The maximum thickness of the copper nozzle is 3.3 mm
b. The maximum thickness of the steel nozzle is 0.054 mm
The question has to do with heat transfer
What is heat transfer?Heat transfer is the movement of heat energy from one body to anotrher.
How to calculate the maximum wall thickness?Since the rate of heat loss by the gas equal rate of heat gain by the metal.
Rate of heat loss by gasThe rate of heat loss by gas is P = -hA(T - T') where
h = heat transfer coefficient of gas = 2 × 10⁴ W/m²-K, A = surface area of nozzle, T = maximum temperature of metal and T = Temperature of gas = 2750°CRate of heat gain by metalThe rate of heat gain by metal is given by P' = kA(T - T")/t where
k = thermal coefficient of metal, A = surface area of nozzle, T = maximum temperature of metal, T" = temperature of exterior wall of nozzle = 150°C and t = thickness of nozzle. Maximum thickness of nozzle.Since P = P', we have that
-hA(T - T') = kA(T - T")/t
Making t subject of the formula, we have
t = -k(T - T")/h(T - T')
a. Maximum thickness for copper nozzleGiven that for copper
T = 540°C and k = 378 W/m-KSubstituting the values of the variables into t, we have
t = -k(T - T")/h(T - T')
t = -378 W/m-K(540°C - 150°C)/[2 × 10⁴ W/m²-K(540°C - 2750°C)]
t = -378 W/m-K(390°C)/[2 × 10⁴ W/m²-K(-2210°C)]
t = 147420 W/m/4420 × 10⁴ W/m²
t = 147420 W/m/44200000 W/m²
t = 0.0033 m
t = 3.3 mm
So, the maximum thickness of the copper nozzle is 10.71 cm
b. Maximum thickness for steel nozzleGiven that for steel
T = 980°C and k = 23.2 W/m-KSubstituting the values of the variables into t, we have
t = -k(T - T")/h(T - T')
t = -23.2 W/m-K(980°C - 150°C)/[2 × 10⁴ W/m²-K(980°C - 2750°C)]
t = -23.2 W/m-K(830°C)/[2 × 10⁴ W/m²-K(-1770°C)]
t = 19256 W/m/3540 × 10⁴ W/m²
t = 19256 W/m/35400000 W/m²
t = 0.0000544 m
t = 0.0544 mm
t ≅ 0.054 mm
So, the maximum thickness of the steel nozzle is 0.054 mm
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Question1:
You are contracted to install MS Exchange Server software on all PCs of a company. After doing half of the work, you found that the company did not pay MS for the copies you are installing. You notified the company that they were out of compliance with MS licensing requirement, but got no response.
(a) What do you do?.
(b) What other information would you need?.
(c) Explain.
Since you have notified the company that they were out of compliance with MS licensing requirement, the next thing to do is to look or ask for the product key that is with the company
The other information would you need is for the company to obtain the product license by buying the product key.
Do you need a license for Microsoft?If you get to buy any of the standard Microsoft Office or other packages that is said to be the Home and Student edition, a person or firm will need a license.
Note that the license is one that guarantee one the use of the product and its installation.
Therefore You need to purchase a lot of copies of it and as such, Since you have notified the company that they were out of compliance with MS licensing requirement, the next thing to do is to look or ask for the product key that is with the company
The other information would you need is for the company to obtain the product license by buying the product key.
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What color is a board sternlight
We can infer and logically deduce that the color of a boat's sternlight is white.
What is a sternlight?A sternlight can be defined as a white light that is designed and developed to be placed as closely as possible and practical with the stern shining continuously (constantly).
By default, a sternlight is typically affixed to the boat in such a way that the light will shine out at an angle of 135 degrees (135°) from the back of the boat.
In this context, we can infer and logically deduce that the color of a boat's sternlight is white and it avails sailors and other persons the opportunity of determining and knowing the direction that a boat (vessel) is moving.
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Complete Question:
What color is a boat sternlight?
Business support systems ____.
Answer:
These are the components telecommunication service providers use to run certain operations towards customers.
hope it helps. pls like and follow
Business support systems "provide job-related information support to users at all levels of a company". The correct option is 'a'.
Business support systems (BSS) encompass a combination of functionalities mentioned in the provided options. Let's discuss each option briefly:
a. Provide job-related information support to users at all levels of a company:
This statement aligns with the concept of Decision Support Systems (DSS), which are a type of BSS that aid users in making informed decisions by providing relevant information and analysis. DSS supports various levels of management by assisting them in evaluating alternatives, analyzing data, and generating reports to support decision-making processes.
b. Simulate human reasoning by combining a knowledge base and inference rules that determine how the knowledge is applied:
This description pertains to Expert Systems, which are an advanced form of BSS. Expert Systems utilize a knowledge base and inference rules to imitate human expertise and provide intelligent solutions to complex problems. They are particularly useful in domains where specialized knowledge is required.
c. Process data generated by day-to-day business operations:
This statement refers to Transaction Processing Systems (TPS), which are an essential component of BSS. TPS handles routine, day-to-day transactions and processes data generated during regular business operations, such as sales, inventory, and payroll.
d. Include e-mail, voice mail, fax, video conferencing, word processing, automated calendars, database management, spreadsheets, and integrated mobile computing systems:
These technologies are examples of Office Automation Systems (OAS), another category of BSS. OAS streamline office tasks and improve communication and collaboration among employees through various software tools and applications.
Therefore, business support systems encompass a range of applications and technologies that provide job-related information support.
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The complete question:
Business support systems ____.
a. provide job-related information support to users at all levels of a company
b. simulate human reasoning by combining a knowledge base and inference rules that determine how the knowledge is applied
c. process data generated by day-to-day business operations
d. include e-mail, voice mail, fax, video conferencing, word processing, automated calendars, database management, spreadsheets, and integrated mobile computing systems
A complicated emissions control system would be the only way to lower a rotary engines poor emissions.
It is false that a complicated emissions control system would be the only way to lower a rotary engines poor emissions.
What is emission control system?Emission control system is developed to reduce emissions and discharge.
They are found in vehicles and other automobile to limit the discharge or release of gases thay are noxious which emit from combustion engine.
To control exhaust emissions, the air-injection system can be used and also, the exhaust gas recirculation (EGR) system can be used to reduce emissions. A high emissions requires high energy control system.
Therefore, It is false that a complicated emissions control system would be the only way to lower a rotary engines poor emissions
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Effutu community members, in a recent community conference aimed at
deliberating on dishonest behavior of some communi ty leaders ended up
justifying unet hical behavior with the assertion that everybody acts
unethically. As a professional ethics st udent, analyze five reasons why
members in Effutu community act unethically
As a professional ethics student, analyze five reasons why members of Effutu community act unethically.
They are:
They believe that everyone acts unethicallyThey believe that there is little to no reward in acting honestlyThey do not believe that ethics has any long-term benefitThey do not want to be the odd-one-outThey are scared of change starting from themWhat is Ethics?This refers to the moral principles that guide a person's behavior and show their conduct to others and also to themselves.
Hence, we can see that based on the assertion made by the Effutu community members, they ended up justifying unethical behavior and the analysis has been made above.
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In an ungrounded electrical systems with conductors installed in grounded metal raceways and enclosures, what is the voltage from the current carrying conductors to the metal raceways and why?
In the ungrounded electrical circuits or systems, the circuit is one that is not or do not have the connection to the grounding electrode.
What is an ungrounded electrical system?An ungrounded system is known to be defined as a system that is known to be one that do not have an intentional connection to ground, and it has an exception of possibly going through potential indication or other kinds of devices.
Note that The neutral of an ungrounded system is one that is seen to be under reasonably balanced load conditions and thus it is one that is usually near to ground potential.
Hence, In the ungrounded electrical circuits or systems, the circuit is one that is not or do not have the connection to the grounding electrode.
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he critical buckling load of an ideal column of circular cross section can be reduced by: The critical buckling load of an ideal column of circular cross section can be reduced by: increasing the Poisson's ratio of the column material increasing the length of the column increasing the modulus of elasticity of the column material increasing the diameter of the column
The critical buckling load of an ideal column of circular cross section can be reduced by increasing the diameter of the column.
What is critical load of buckling of column?The critical load is known to be that factor that is labeled the greatest load that is one which is unable to cause lateral deflection (buckling).
Note that For loads greater than the critical load, the column will tend to decrease laterally. The critical load is known to be one that puts the column in what we call the state of an unstable form of equilibrium.
The critical buckling load is based on the shape and dimensions of beam section that is said to have constant cross sectional area.
Hence, The critical buckling load of an ideal column of circular cross section can be reduced by increasing the diameter of the column.
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A regulator diaphragm is often made from ____. reinforced rubber malleable iron tempered aluminum stainless steel
Answer:
Stainless Steel.
Explanation:
A regulator diaphragm is often made from stainless steel.
A series RL circuit is connected to a 240 V single-phase power line with a frequency of 60 Hz. An ammeter indicates a current flow of 10 A and a wattmeter indicates a true power of 1630 W. Calculate
a) The existing power factor of the circuit.
b) The amount of capacitance required to correct the power factor to 95%.
c) Draw the power triangle for the corrected power factor.
pf=cos(thira)
pf=kw/kvar
The power factor of the motor and the amount of capacitance is 195 μF. The amount of capacitance required to correct the power factor to 95%. Thus, option B is correct.
What is capacitor?A capacitor has been defined as a device that stores the electric strength in an electric powered discipline by using the virtue of accumulating the electric costs on near surfaces insulated from each other. It's miles a passive digital thing with terminals.
The effect of the capacitor is referred to as capacitance. The capacitor is a part that has the capacity or “ability” to save strength inside the form of an electrical price producing a potential difference (Static Voltage) across its plates, similar to a small rechargeable battery.
Calculation:-
P = 18700
Q₂ = 29049.34
S = 29680
Q₂ = v²ωc
29049.34 = (560)² × ( 2π × 60 )
C = 1.95 × 10⁻⁴
C = 195 μF
Therefore, The power factor of the motor and the amount of capacitance is 195 μF. The amount of capacitance required to correct the power factor to 95%. Thus, option B is correct.
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When an inside corner is being welded in the horizontal position, undercutting can be decreased or prevented by?
Answer:
By using a forward-inclined half-moon torch position, stopping momentarily at each end of the weld pool
Explanation:
By using a forward-inclined half-moon torch position, stopping momentarily at each end of the weld pool
Adjusting welding parameters, using appropriate electrode size, and maintaining proper torch angle can prevent undercutting in horizontal
welding of an inside corner.
We have,
When an inside corner is being welded in the horizontal position, undercutting can be decreased or prevented by adjusting the welding parameters, such as:
- Controlling Welding Parameters:
Adjusting the welding parameters is crucial in preventing undercutting.
It involves regulating the welding current, voltage, and travel speed.
- Selecting Appropriate Electrode Size:
Choosing the right electrode size is essential to control the heat generated during the welding process.
Smaller electrode diameters generally provide lower heat input, which can help prevent undercutting.
- Maintaining Proper Torch Angle and Manipulation Techniques:
Keeping the correct torch angle during welding is crucial to control the weld pool and metal deposition.
- reducing the welding current and travel speed
- using the appropriate electrode size
- maintaining proper torch angle and manipulation techniques.
Thus,
Adjusting welding parameters, using appropriate electrode size, and maintaining proper torch angle can prevent undercutting in horizontal welding of an inside corner.
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Asian red coolant is what type?
Answer:
Valvoline™ ZEREX™ Asian Vehicle has been designed to meet the requirements of Asian manufacturers, which specify a silicate free HOAT formula with a phosphate additive to protect their cooling systems from rust and corrosion. Available in both red and blue formulas to better match your Asian vehicle’s specific requirements.
Explanation:
ZEREX Asian Vehicle Antifreeze/Coolant is specifically formulated to meet the requirements of Asian vehicle manufacturers (Toyota , Lexus , Scion and others) requiring a red, silicate free Hybrid Organic Acid Technology (HOAT) with a phosphate additive.
Answer:poat formulation
Explanation:
Exam Lesson Name: The Trades of Plumbing and Pipet
Exam number: 286115RR
Exam Guidelines
Exam Instructions
Question 4 of 20:
Select the best answer for the question.
4. Before starting construction work on a building, you should apply for which of the following?
OA. A contractor's license
OB. A permit
OC. A bond
OD. An inspector's approval
Mark for review (Will be highlighted on the review page)
Answer: ………………..
Explanation:???????????????
You have three gear wheels a, b and c connected to each other,if you turn the first gear wheel "a" clockwise what will happen to b and c
In the case above, It will take more time for a tooth of wheel B and C to make a full turn (slower) than it will for a tooth of wheel A.
What are gear wheels?A gear wheel is known to be a kind of a wheel that is known to be made up of a teeth and/or cogs that is known to function with those of other aspect of the wheel or part.
Note that in the above case, lets use a scenario that Wheel P has 5 teeth. Wheel M has 3 teeth and wheel N has 1 teeth. If wheel P makes a full turn, wheel M turn will be slower as well as wheel N which will take more time.
Therefore, In the case above, It will take more time for a tooth of wheel B and C to make a full turn than it will for a tooth of wheel A.
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When required to drill holes on a roof that has no power supply the best drill for the job would be__________.
When required to drill holes on a roof that has no power supply the best drill for the job would be a cordless drill.
What is power supply?It should be noted that a power supply is an electrical device which supplies electric power to an electrical load.
In this case, the main purpose of a power supply is simply to be able to convert electric current from the source to the correct current, and frequency.
In this case, the power supply unit converts the main AC to a low-voltage regulated DC power. Therefore, When required to drill holes on a roof that has no power supply the best drill for the job would be a cordless drill.
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What is the name of this piece?
Answer: block o’ metal
Explanation:
When making a conduit-to-box connection and a bonding wire will be installed, use?
When making a conduit-to-box connection and a bonding wire will be installed, by using a. grounding locknut.
How can one connect conduit to a box?
Metallic couplings can be used for metallic conduit and they can be secured with set screws or via compression.
It should be noted that the threaded couplings screw onto couplings that have threaded ends will make it easier.
Nonmetallic couplings can be used for nonmetallic conduit which are usually attached with solvent cement, hence When making a conduit-to-box connection and a bonding wire will be installed, by using a. grounding locknut.
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The torque developed by the motor in N-m and lb-ft
Explanation:
HP to torque (Nm) Calculation:
Torque T(Nm) in Newton meter (Nm) is equal to the 746 times of power P(HP) in horsepower divided by the 0.105 times of the motor speed N(rpm) in RPM. In another short word, 7127 times of horsepower divided by the motor speed is equal to motor torque.
Technician A says that some manufacturers recommend against breaking the cylinder glaze with a glaze breaker when re-ringing an engine that has not been removed from the car. Technician B says that a Flex-Hone is used to help break the cylinder glaze so new rings can seat more easily. Who is right
Both Technician A that says that some manufacturers recommend against breaking the cylinder glaze with a glaze breaker and Tech B that says Flex-Hone is used to help break the cylinder glaze are right.
What is the reason behind deglazing a cylinder?
Deglazing can be regarded as the techniques that is been used on the surface of an engine cylinder which is been roughened to create friction between the moving parts .
Doing this will now give room for engine oil to grip the sides of the cylinder, hence Both Technician A that says that some manufacturers recommend against breaking the cylinder glaze with a glaze breaker and Tech B that says Flex-Hone is used to help break the cylinder glaze are right.
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The factor of safety for a machine element depends on the particular point selected for the analysis.
This bar is made of AISI 1006 cold-drawn steel (Sy=280MPa) and it is loaded by the forces F=0.55kN, P=8.0kN and T=30N.m. Based upon the Von Misses theory, determine the safety factor for points A and B.
Based upon the Von Mises theory, the safety factor for points A and B are 2.77 and 6.22 respectively.
How to calculate the safety factor for points A and B?From the diagram of this bar made of AISI 1006 cold-drawn steel shown in the image attached below, we can logically deduce the following parameters:
Stress, Sy = 280 MPa.Force, F = 0.55 kN to N = 550 N.Pressure, P = 8.0 kN to N = 800 N.Surface tension, T = 30 Nm.Length, l = 100 mm to m = 0.1 m.Diameter, d = 200 mm to m = 0.02 m.At point A, the stress is given by this equation:
σx = Mc/I + P/Area
[tex]\sigma_x = \frac{Fl(\frac{d}{2}) }{\frac{\pi d^2}{64} } +\frac{P}{\frac{\pi d^2}{4} } \\\\[/tex]
σx = 32Fl/πd³ + 4P/πd²
Substituting the given parameters into the formula, we have;
σx = 32(550)(0.1)/π(0.02)³ + 4(800)/π(0.02)²
σx = 95.49 MPa.
Next, we would determine the torque:
Mathematically, torque can be calculated by using this formula:
τxy = Tr/J = 16T/πd³
τxy = 16(30)/π(0.02)³
τxy = 19.10 MPa.
From Von Misses theory, we have:
σVM = √(σx² + 3τxy²)
σVM = √(95.49² + 3(19.10)²)
σVM = 101.1 MPa.
Now, we can calculate the safety factor for point A:
n = Sy/σVM
n = 280/101.1
n = 2.77.
At point B, the stress is given by this equation:
σx = 4P/πd²
σx = 4(800)/π(0.02)²
σx = 25.47 MPa.
Next, we would determine the torque:
Mathematically, torque can be calculated by using this formula:
τxy = Tr/J = 16T/πd³ + 4V/3A
τxy = 16(30)/π(0.02)³ + 4(550)/3π(0.02)³
τxy = 21.43 MPa.
From Von Mises theory, we have:
σVM = √(σx² + 3τxy²)
σVM = √(25.47² + 3(21.43)²)
σVM = 45.02 MPa.
Now, we can calculate the safety factor for point B:
n = Sy/σVM
n = 280/45.02
n = 6.22.
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A flux used for welding, brazing, or soldering prevents the formation of, dissolves, or helps remove?
Answer:
Helps to remove Oxides formed during brazing.
Explanation:
Flux is needed to dissolve and remove oxides that may form during brazing. Prevent or inhibit the formation of oxide during the brazing process
A station supplies 250 kVA at a lagging power factor of 0.8. A synchronous motor is connected in parallel with the load. If combined load is 250 kW with lagging p.f. of 0.9, determine:
Answer:al part of question
Explanation:voltage
Military glorification through mosaics, relief carvings and triumphant arches are often associated with?
Military glorification through mosaics, relief carvings and triumphant arches are often associated with roman architectural monument and is the correct choice.
What is a Monument?This can be defined as a structure which is usually large and is used to commemorate the history of an influential person. This helps to serve as an example and also a reminder as to why the performance of good deeds are important
The use of military glorification through mosaics, relief carvings and triumphant arches were also often used by the Romans in other to commemorate war victories and the succession of a new ruler which is known as the emperor.
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a) Your friend is faced with a situation i n whi ch t here is a difficulty in
choosi ng bet ween what he/she is being asked t o do and what is consistent
wit h appropriate ethi cal behavi or. Such a situati on calls for critical thi nking
in deci di ng about what shoul d be t he proper course of acti on. Wit h concrete
exa mpl es, exa mi ne any four steps he/she needs t o go through i n order to
make t he ri ght et hical decisions.
The Steps my friend need to make an ethical decision are:
Step One: He or she needs to define the Problem. Step Two: He or she needs to find out possible Resources to solve the problem and then Brainstorm on the List for the Potential Solutions to the problem.Step Three : Evaluate and examine those Alternatives. ...Step Four : Make his or her Decision, Implement It and then examine your Decision.What is ethical decision model?An ethical decision-making model is known to be a kind of a tool that can be used by a person to help create the ability to think in regards to an ethical dilemma and come to an ethical decision.
Note that Ethical decision-making is one that is dependent on the key character values such as trustworthiness, respect, role, fairness, and others.
Therefore, The Steps my friend need to make an ethical decision are:
Step One: He or she needs to define the Problem. Step Two: He or she needs to find out possible Resources to solve the problem and then Brainstorm on the List for the Potential Solutions to the problem.Step Three : Evaluate and examine those Alternatives. ...Step Four : Make his or her Decision, Implement It and then examine your Decision.Learn more about ethical decision from
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what do you understand by the statement"the relative velocity of a body A with respect to body B".
The relative velocity is defined as the velocity of an object with respect to another observer. It is the time rate of change of relative position of one object with respect to another object.
What is the relative velocity of A with respect to B?The relative velocity of A with respect to B= velocity of the body A – velocity of the body B.
What is relative velocity and its formula?The relative velocity formula is expressed as. V → = V A B → + V B C → Where. VAB is the velocity with respect to A and B, VBC is the velocity with respect to B and C and VAC is the velocity with respect to A and C.
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Two techniques that allow the io to play a useful advisory role even without direct experience in human subject protection areas are:_____.
The two techniques that allow the io to play a useful advisory role even without direct experience in human subject protection areas are periodically reviewing institutional policy and reviewing federal regulatory agency determination letters.
What is advisory?It should be noted that the role of an advisory board is to provide current knowledge, critical thinking as well as to increase the confidence of the decision-makers that represent the company.
Also, human subjects protections implies the collective term for the federal, state, and university ethical considerations which protect the rights and welfare of human beings.
Therefore, the two techniques that allow the io to play a useful advisory role even without direct experience in human subject protection areas are periodically reviewing institutional policy and reviewing federal regulatory agency determination letters.
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Question 5 of 10
Multiple Choice
How much cubic inch space is required inside a box for 4 #6 XHHN current carrying conductors?
OA. 12 cubic inches
OB. 10 cubic inches
OC. 20 cubic inches
OD. 8 cubic inches
The cubic inch space that is required inside a box for 4 #6 XHHN current carrying conductors will be D. 8 cubic inches.
What is a conductor?It should be noted that a conductor simply means a substance or material that simply allows electricity to pass through it.
From the information given, the cubic inch space that is required inside a box for 4 #6 XHHN current carrying conductors is yo be computed.
This will be:
= (4 × 6)/3
= 24/3
= 8
In conclusion, the cubic inch space that is required inside a box for 4 #6 XHHN current carrying conductors will be 8 cubic inches.
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Do you think that individuals with the same disabilities have the same needs? If your answer is yes, how? /No, why?
Disability is extremely diverse. While some health conditions associated with disability result in poor health and extensive health care needs, others do not. However, all people with disability have the same general health care needs as everyone else, and therefore need access to mainstream health care services.
What is voltage drop?
Answer:
Explanation:
It is the voltage a voltmeter would read when connected across something that has resistance.
___________0_________O______O_______
| |
| | |
|_____________________| |_____________ |
|
The diagram above is supposed to represent 3 lightbulbs connected in series. The vertical lines in the middle are supposed to be a battery which powers the three light bulbs. If you put a voltmeter across one of the lightbulbs, it will read a voltage that is 1/3 of the voltage of the battery.
Answer
That reading you get across the one light bulb is The Voltage Drop.