If a luminaire is not working, ____________.
a. remove it and install a new one
b. replace ballast components c. check the circuit breakers or fuses, and if not tripped/blown, try replacing the lamp
d. check lamp socket position and adjust accordingly

Answer:

Purpose of review papers

They carefully identify and synthesize relevant literature to evaluate a specific research question, substantive domain, theoretical approach, or methodology and thereby provide readers with a state-of-the-art understanding of the research topic.

Answer:

what do we do

Explanation:

Answer:

18 000 liters

Explanation:

Mass flow rate = volumetric flow rate x density of air at that elevation

M = 0.3m3/min x 0. 7kg/m3 = 0.21kg/min

min diameter of fan = 0.063m

the velocity V must not exceed 95m/min,

Using Q = AV

A is the surface area of the fan

Q = 0.3m3/min, from above

A = Q/V = 0.3/95 = 0.003157m2

But A = (¶d^2)/4

d^2 = 4A/¶ = 4 x 0.003157/3.142

d^2 = 0.004019

d = 0.063m

The combined efficiency of the fan–motor unit to be used can be taken to be 50 percent. If the fan is to replace the entire volume of air in 15 min, determine the wattage of the fan–motor unit to be purchased.

Mass flow rate = volumetric flow rate x density of air at that elevation

M = 0.3m3/min x 0. 7kg/m3 = 0.21kg/min

min diameter of fan = 0.063m

the velocity V must not exceed 95m/min,

Using Q = AV

A is the surface area of the fan

Q = 0.3m3/min, from above

A = Q/V = 0.3/95 = 0.003157m2

But A = (¶d^2)/4

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Answer: None of the above

Explanation:

Business process modeling refers to the graphical representation of the business processes of a company, which is vital in the identification of potential improvements.

Business pticess modelling can be done through graphing methods, like data-flow diagram, flowchart etc. It is vital as business managers can effectively and quickly communicate their ideas.

It also enhances the customization of business processes, enhances the competitive advantage and enhances the process communication as well.

Therefore, the answer to the question will be "None of the above".

Answer:

In this era, Sun Ra was among the first of any musicians to make extensive and pioneering use of synthesizers and other various electronic keyboards; he was given a prototype Minimoog by its inventor, Robert Moog.

Explanation:

Answer:

the force conveyed by the fibers is 947.93 lb-f

Explanation:

Given the data in the question;

V_f = 80% = 0.8

V_m = 1 - V_f = 1 - 0.8 = 0.2

Now,

length of fibre L_f = length of Nylon L_n

V_f = A_f × L_f = 0.8

V_m = A_n × L_n = 0.2

so

V_f/V_m = A_f/A_n = 0.8/0.2

A_f/A_n = 4

now, the strains in fibre is equal to strains in nylon

(P/AE)f = (P/AE)n

P_f/A_fE_f = P_n/A_nE_n

P_f = (A_f/A_n)(E_f/E_n)(P_n)    

P_f = ( 4 )( 131 / 2.8 )(Pn)  

P_f = 187.14Pn

and P_n = Pf / 187.14

Hence

given that P_total = 953 lb-f

P_f + P_n = 953

P_f + ( P_f / 187.14 ) = 953

P_f( 1 + ( 1 / 187.14 ) ) = 953

P_f( 1.00534359 = 953

P_f = 953 / 1.00534359

P_f = 947.93 lb-f

Therefore, the force conveyed by the fibers is 947.93 lb-f

The core loss component​ is 250W.

The term core loss refers to the total energy lost in the production of heat. Core loss is the loss due to the changing magnetization of the magnetic core, which is the sum of hysteresis loss and eddy current loss.

Core losses have two main causes ohmic or Joule heating caused by eddy currents induced by a changing magnetic field in a conducting medium, and losses due to cyclic reversals of magnetization in ferromagnetic materials, which are proportional to the area of ​​the magnet. field hysteresis loop. Core loss is often measured using the Epstein frame method, which includes a primary and secondary coil.

therefore , by using this formula core loss can be calculated as

W =\(V_{1} I_{0}\)cosФ₀

= 250x 4x 0.25

= 250W.

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The capacity of the last stage in a 4-stage system with 4 processors can be determined by looking at the different options provided.


The capacity of a stage is determined by the maximum capacity of its individual processors. In this case, since there are 4 processors in the last stage, we need to consider the maximum capacity among those processors. This is because the maximum capacity represents the highest level of processing power that can be achieved in that stage.

To better understand this, let's consider an example. Suppose the individual capacities of the 4 processors in the last stage are 2, 4, 6, and 8. The maximum capacity among these processors is 8. Therefore, the capacity of the last stage would be 8.

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Answer:

3

Explanation:

4*(3/4)=3

Answer:The preferred development environment can vary depending on personal preferences, the type of project, and the programming language being used.

Explanation:

The little hardware component known as a network switch connects many computers to one local area network (LAN). Switches are not capable of sharing an Internet connection or connecting to several networks.

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Answer:

Answer is 3.2 Ω (Ohms)

Explanation:

From Ohms Law I = V/R

R = V(I)

R = 8(0.4)

R = 3.2

The resistance of a lamp if the current through it is 0.4 A and the voltage across it is 8 V is 3.2 ohm.

According to Ohm's law, when all other physical parameters, including temperature, are held constant, the voltage across a conductor is directly proportional to the current flowing through it.

According to Ohm's Law, the electrical current I flowing through a particular conductor is precisely proportional to the potential difference (voltage) V across its ends (assuming that the conductor's physical properties, such as its temperature and pressure, stay constant). where R is a proportionality constant.

Given:

Current, I= 0.4 A

Voltage, V= 8 V

Using Ohm's Law

V= IR

I = V/R

R = V(I)

R = 8(0.4)

R = 3.2 ohm

Hence, the resistance of a lamp if the current through it is 0.4 A and the voltage across it is 8 V is 3.2 ohm.

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As 0.04 < 0.05, the null hypothesis can be rejected and the alternative hypothesis can be accepted.iii) Type of error in the study and its justification:Type I error is the incorrect rejection of a true null hypothesis, which is also known as a "false positive."

The answer to the given question is as follows:i) Possible parameter in the study:The possible parameter in the study is reflectivity.

ii) Is there enough evidence that the new improved design is helping in improving visibility?Yes, there is enough evidence that the new improved design is helping in improving visibility. P-value for the difference between rate of visibility for new and old signboards is found to be 0.04, which is less than 0.05.

As 0.04 < 0.05, the null hypothesis can be rejected and the alternative hypothesis can be accepted.iii) Type of error in the study and its justification:Type I error is the incorrect rejection of a true null hypothesis, which is also known as a "false positive."

In this study, a Type I error is possible. If the null hypothesis is true and there is no significant difference between the new and old signboard visibility, but we reject the null hypothesis in favor of the alternative hypothesis, it will result in a Type I error.

This means that we will conclude that the new signboard is better, even though there is no real difference between the two.

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Answer:

energy security ethanol

Answer:

b. A view of a building seen from one side, a flat representation of one façade. This is the most common view used to describe the external appearance of a building.

Explanation:

An elevation is a three-dimensional, orthographic, architectural projection that reveals just a side of the building. It is represented with diagrams and shadows are used to create the effect of a three-dimensional image.

It reveals the position of the building from ground-depth and only the outer parts of the structure are illustrated. Elevations, building plans, and section drawings are always drawn together by the architects.

The 1/7-power-law velocity profile is a better representation of the velocity profile in a turbulent boundary layer than the parabolic laminar boundary-layer velocity profile.

What is velocity?
Velocity is the rate at which an object moves in a certain direction. It is a vector quantity, meaning it has both magnitude (the speed) and direction. Velocity is often expressed as the rate of change of displacement, which is the distance an object travels in a certain direction. Velocity is the change in position over time; the faster an object moves, the greater the velocity. Velocity is important in physics because it is used to calculate the acceleration of an object, the force of gravity, and the momentum of a moving object. It is also used to measure the speed of sound and the speed of light. Velocity is a fundamental concept in physics, and it is used to describe and measure a variety of physical phenomena.

This is because the former has a higher velocity near the wall and a lower velocity near the centerline, which is more representative of the actual velocity profile in a turbulent boundary layer.
The 1/7-power-law velocity profile is represented by the equation u/U = (y/delta)1/7 and the parabolic laminar boundary-layer velocity profile is represented by the equation u/U = (y/delta)2.
When these two equations are plotted on the same graph, with y/delta on the ordinate and u/U on the abscissa, the 1/7-power-law velocity profile is seen to have a higher velocity near the wall and a lower velocity near the centerline, which is more representative of the actual velocity profile in a turbulent boundary layer.

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Proteus simulation is  a software tool. It is used for the   designing and testing  of electronic circuits. So thetool will be conneted to the LCD as well as the cips on the left.

This tool is popular among engineers and students as it allows them to test their designs virtually with  ease, eliminating the need to physically build and test the circuit.

Through robust circuitry simulations under different conditions, designers can identify faults in functionality promptly and make necessary changes before building the physical prototype.

The utilization of Proteus simulation equips individuals with the ability to devise and assess electronic circuits in a highly efficient and economical manner, specifically targeting those found in mobile phones.

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9514 1404 393

Answer:

  1

Explanation:

Only one such circle can be drawn. The diameter of the 10" circle will be a radius of the semicircle. In order for the 10" circle to be wholly contained, the flat side of the semicircle must be tangent to the 10" circle. There is only one position in the figure where that can happen. (see attached).

Answer:

The township due south of t2s, r4e would be t3s, r4e.

if you have located a township numbered t2s, r4e, the township due south of that township would be t3s, r4e.

in the public land survey system (plss), townships are organized in a grid pattern based on range (east-west) and township (north-south) lines. the township numbering system starts from the base line (typically the south boundary of a state) and the principal meridian (a north-south reference line).

in this case, "t2s" refers to the second township south of the base line, and "r4e" refers to the fourth range east of the principal meridian. to find the township due south, you would simply increment the township number by one. this means that if you move one township directly south from the given township, you would arrive at t3s, r4e.

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The program to convert MegaBytes to either Bytes, KiloBytes, GigaBytes, or TeraBytes is found in the attached image.

The program defines five helper functions to help the program do its work. The functions are:

Within the Main Program, a while loop is used to make sure the menu continues to be presented to the user until the user selects the option to quit.

The inner while loop makes sure the user enters an option within the menu.

Once the user enters an option to convert, the program requests the value to be be converted, in MegaBytes. then an if statement selects the correct conversion function.

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Answer:

Typically, diesel trucks cost more than those with gas engines, especially when you're first buying them, as diesel is usually featured as an add-on for gas-powered cars. Diesel add-ons can cost over $5,000 for midsize trucks and around $10,000 for heavy-duty trucks.

Explanation:

Make me brain pls

Answer:

- the mass flow rate of air is 7.53 kg/s

- the exit area is 0.108 m²

Explanation:

Given the data in the question;

lets take a look at the steady state energy equation;

m" = W"\(_{cv\) / [ (h₁ - h₂ ) -\(\frac{V_2^2}{2}\) ]

Now at;

T₁ = 900K, h₁ = 932.93 k³/kg

T₂ = 500 K, h₂ = 503.02 k³/kg

so we substitute, in our given values

m" = [ 3200 kW × \(\frac{1\frac{k^3}{s} }{1kW}\) ] / [ (932.93 - 503.02  )k³/kg  -\(\frac{100^2\frac{m^2}{s^2} }{2}\)|\(\frac{ln}{kg\frac{m}{s^2} }\)||\(\frac{1kJ}{10^3N-m}\)| ]

m" = 7.53 kg/s

Therefore, the mass flow rate of air is 7.53 kg/s

now, Exit area A₂ = v₂m" / V₂

we know that; pv = RT

so

A₂ = RT₂m" / P₂V₂

so we substitute

A₂ = {[ \((\frac{8.314}{28.97}\frac{k^3}{kg.K})\)×\(500 K\)×\((7.54 kg/s)\) ] / [(1 bar)(100 m/s )]} |\(\frac{1 bar}{10N/m^2}\)||\(10^3N.m/1k^3\)

A₂ = 0.108 m²

Therefore, the exit area is 0.108 m²

The American society of civil engineering give us infrastructure in 2013 A grade of D

The overall score for America's infrastructure in all 16 categories is D+ in the 2013 Report Card, which is slightly higher than the D in ASCE's 2009 Report Card.

Six infrastructure sectors profited through increased private sector investment, focused initiatives in municipalities and states to perform renovations or repairs, or a one-time boost in government money.

Importantly, it is the first time the grades have increased since the American Society of Civil Engineers initially rated the quality of America's network in 1998. Nevertheless, a D+ rating remains unacceptable.

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Answer:

torque to raise the load = 16.411 Nm

torque to lower the load = 8.40 Nm

overall efficiency = 0.24

Explanation:

Given:

max load on vertical direction of the screw = Force = F = 5kN

frictional  diameter of the collar = 45 mm

Diameter = 25 mm

length of pitch = 5 mm

coefficient of friction for thread µ  = 0.09

coefficient of friction for collar µ\(_{c}\) = 0.06

To find:

torque to "raise" the load

torque to and "lower"

overall efficiency

Solution:

Compute torque to raise the load:

\(T_{R} = \frac{ Fd_{m}}{2} (\frac{L+(\pi ud_{m}) }{\pi d_{m}-uL }) +\frac{Fu_{c} d_{c} }{2}\)

where

\(T_{R}\) is the torque

F is the load

\(d_{m}\) is diameter of thread

\(d_{c}\) is diameter of collar

L is the thread pitch distance

µ is coefficient of friction for thread

µ\(_{c}\)  is coefficient of friction for collar

Putting the values in above formula:

\(T_{R}\) = 5(25) / 2 [5+ (π(0.09)(25) / π(25)-0.09(5)] + 5(0.06)(45) / 2

    = 125/2 [5 + (3.14)(0.09)(25)/ 3.14(25)-0.45] + 13.5/2

    = 62.5 [(5 + 7.065) / 78.5 - 0.45] + 6.75

    = 62.5 [12.065 / 78.05 ] + 6.75

    = 62.5 (0.15458) + 6.75

    = 9.66125 + 6.75

    = 16.41125

\(T_{R}\) = 16.411 Nm

Compute torque to lower the load:

\(T_{L} = \frac{ Fd_{m}}{2} (\frac{(\pi ud_{m}) - L }{\pi d_{m}-uL }) +\frac{Fu_{c} d_{c} }{2}\)

     = 5(25) / 2 [ (π(0.09)(25) - L / π(25)-0.09(5) ] + 5(0.06)(45) / 2

     = 125/2 [ ((3.14)(0.09)(25) - 5) / 3.14(25)-0.45 ] + 13.5/2

     = 62.5 [ (7.065 - 5) / 78.5 - 0.45 ] + 6.75

    = 62.5 [ 2.065 / 78.05 ] + 6.75

     = 62.5 (0.026457) + 6.75

     = 1.6535625 + 6.75

     = 8.40 Nm

Since the torque required to lower the the load is positive indicating that an effort is applied to lower the load, Hence the thread is self locking.

Compute overall efficiency:

overall efficiency = F(L) / 2π \(T_{R}\)

                             = 5(5) / 2(3.14)( 16.411)

                             = 25/ 103.06108

overall efficiency = 0.24

(a) To determine the length of each side of a duct if the air speed in the duct is to be 3.2 m/s, we can use the equation:

Volume flow rate = Area x Air speed

The volume flow rate is the volume of air that needs to be supplied to each room every 29 minutes, which is:

Volume flow rate = 175 m^3 / 29 min = 6.03 m^3/s

The area of the duct can be found by rearranging the equation:

Area = Volume flow rate / Air speed

Substituting the given values, we get:

Area = 6.03 m^3/s / 3.2 m/s = 1.885 m^2

Since the duct is square, each side of the duct will have the same length, which is:

Side length = sqrt(Area) = sqrt(1.885 m^2) = 1.373 m

Therefore, the length of each side of a duct if the air speed in the duct is to be 3.2 m/s is 1.373 m.

(b) To determine the length of each side of a duct if the air speed at the duct is to be twice the previous speed, we can use the same equation:

Volume flow rate = Area x Air speed

The volume flow rate is still the same, but the air speed is now 2 x 3.2 m/s = 6.4 m/s. Substituting the values, we get:

Area = 6.03 m^3/s / 6.4 m/s = 0.941 m^2

The length of each side of the duct is:

Side length = sqrt(Area) = sqrt(0.941 m^2) = 0.970 m

Therefore, the length of each side of a duct if the air speed at the duct is to be twice the previous speed is 0.970 m.

To calculate the temperature difference across the concrete slab, we subtract the temperature at the top (17°C) from the temperature at the bottom (10°C).

Temperature difference = 17°C - 10°C

= 7°C

To find the heat flow through the concrete slab, we can use the formula:

Heat flow = (thermal conductivity) x (area) x (temperature difference) / (thickness) The thermal conductivity of concrete can vary, but for this example,

let's assume it is 1.5 W/make.

Area = length x width

= 11 m x 8 m = 88 m²

Temperature difference = 7°C

Thickness = 0.20 m

Heat flow = (1.5 W/make) x (88 m²) x (7°C) / (0.20 m)

= 924 W

so, the heat flow through the concrete slab during winter is 924 watts.

The heat flow through the concrete slab of the basement during winter is 924 watts. The heat flow through the concrete slab of a basement can be calculated using the formula:

Heat flow = (thermal conductivity) x (area) x (temperature difference) / (thickness). In this case, the thermal conductivity of concrete is assumed to be 1.5 W/make. The area of the slab is calculated by multiplying its length (11 m) by its width (8 m), resulting in 88 m². The temperature difference is obtained by subtracting the temperature at the top of the slab (17°C) from the temperature at the bottom (10°C), giving a difference of 7°C. Finally, the thickness of the slab is given as 0.20 m.

Plugging these values into the formula, we get:

Heat flow = (1.5 W/m·K) x (88 m²) x (7°C) / (0.20 m)

= 924 W.

Therefore, the heat flow through the concrete slab during winter is 924 watts. The heat flow through the concrete slab of a basement during winter is found to be 924 watts.          

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The statement that The different taste qualities (sweet, sour, bitter, salt, umami) each have their own area of the tongue that is most sensitive to them is False.

Gate Theory states that competing signals such as rubbing your elbow can make you more sensitive to pain. This theory suggests that physical signals such as massage, pressure, heat, or cold can block the transmission of pain messages through the spinal cord and prevent them from reaching the brain. Therefore, when people rub their elbows or apply pressure to the area, this stimulates the non-painful touch fibers and decreases the transmission of the painful stimuli.

As per the statement, patients who are allowed to self-administer morphine use less than when they receive injections from healthcare providers is True. Olfaction is a very important sense for humans, and they often become depressed when they lose their sense of smell (olfaction). The statement that The different taste qualities (sweet, sour, bitter, salt, umami) each have their own area of the tongue that is most sensitive to them is False.

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