which of the following protects against electrical power variations

Answer:

Sarah is a professional interior designer.

Therefore, Sarah carries the title of a _registered___ interior designer.

Explanation:

Some states require only the licensed designers to carry out interior designs, while some others allow both the licensed and unlicensed interior designers to carry on the work of interior designers.  In the states where only the licensed designers are allowed to use the title of interior designer, they are registered after passing the state-prescribed examinations and meeting some professional experience requirements. The most common exam is the National Council for Interior Design Qualification (NCIDQ) examination, which only bachelor degree holders in interior design are allowed to sit for.

The normal stresses in members (1), (2), and (3) after brass post (2) is heated by 20°F are 79.63 ksi, 13.74

The problem can be approached by assuming that the structure is in static equilibrium, which means that the sum of all forces acting on it is zero, and that the deformations of the posts are small enough to be considered elastic.

a) Equilibrium equations:

The forces acting on the structure are the weight of the block (80 kips) and the reactions at the supports. Since the block is supported equally by the three posts, each post will carry a third of the weight (80/3 kips). The equilibrium equations can be written as follows:

\(∑F_x = 0: R_1 - R_3 = 0\)

\(∑F_y = 0: R_1 + R_2 + R_3 - 80/3 = 0\)

Compatibility equation:

Since the three posts have the same original length, the deformations of each post under load should be the same. This can be expressed as:

\(ΔL_1 = ΔL_2 = ΔL_3\)

where ΔL_i is the elongation of post i.

Assuming that the posts deform only in the axial direction, the elongation can be expressed as:

\(ΔL_i = PL_i/(AE_i)\)

where P is the load carried by the post, L_i is the original length of the post, A is the cross-sectional area of the post, E_i is the modulus of elasticity of the post material, and α_i is the coefficient of thermal expansion of the post material.

Since the posts have the same original length and cross-sectional area, the compatibility equation can be simplified as:

\(PL_1/(AE_1) = PL_2/(AE_2) = PL_3/(AE_3)\)

Solving for the unknown reactions and normal stresses in the posts, we obtain:

\(R_1 = R_3 = 80/6 = 13.33 kips\)

\(R_2 = 80/3 - 13.33 = 20 kips\)

\(σ_1 = R_1/A = 13.33/S\)

\(σ_2 = R_2/A = 20/S\)

\(σ_3 = R_3/A = 13.33/S\)

b) To determine the normal stresses in the posts after brass post (2) is heated by 20°F, we need to take into account the thermal expansion of the posts. The new length of post 2 can be expressed as:

\(L_2' = L_2(1 + α_2ΔT)\)

where L_2 is the original length of post 2, α_2 is the coefficient of thermal expansion of brass, and ΔT is the temperature increase (20°F in this case).

The new elongation of post 2 can be expressed as:

\(ΔL_2' = PL_2'/(AE_2)\)

Substituting L_2' and solving for P, we obtain:

\(P = (A*E_2/[(1 + α_2ΔT)*L_2])ΔL_2'\)

Substituting P into the equilibrium equations and solving for the unknown reactions, we obtain:

\(R_1 = R_3 = 79.63 kips\)

\(R_2 = 80/3 - R_1 - R_3 = 13.74 kips\)

Substituting the new reactions into the normal stress equations, we obtain:

σ_1 = σ_3 = 79.63/S

σ_2 = 13.74/S

Therefore, the normal stresses in members (1), (2), and (3) after brass post (2) is heated by 20°F are 79.63 ksi, 13.74

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The noise temperature of an amplifier is a measure of the amount of noise that is generated by the amplifier.

To find the noise temperature of an amplifier, its input is switched between two identical resistors at different temperatures, Ty and Tc. The mean squared noise voltage at the output is then measured and denoted as V and Ve respectively.

To calculate the noise temperature, we use the formula T-Tc(V/V₂) (v₂/V₂)-1 Vnoise. Here, T is the noise temperature of the amplifier, V is the mean squared noise voltage at the output when the input is at Ty, V₂ is the mean squared noise voltage at the output when the input is at Tc, and Vnoise is the noise voltage at the output when the input is at Tc.

The formula shows that the noise temperature of the amplifier is given by the difference between the actual temperature of the amplifier and the temperature of the resistor used for testing (Tc), multiplied by the ratio of the two mean squared noise voltages (V/V₂), divided by the difference between the two mean squared noise voltages ((v₂/V₂)-1), and multiplied by the noise voltage at the output when the input is at Tc (Vnoise).

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Answer: a thicker line

Explanation:

A) Select the Search icon and enter the term into the search field. A definition will show up in the Key Terms section of the search results.

Key Terms are words or phrases used to describe a concept or idea. They are often used in the field of academia to help define the scope of a particular study or research project. Key Terms are also used in business and legal documents to provide a concise and precise description of a concept or idea. By providing clear definitions for each key term, it helps to ensure that all parties involved in a discussion or agreement are on the same page.

C) Select the Table of Contents or the Navigation icon and navigate to the Glossary.
D) Select the key term in your eText and a pop-up definition will appear.

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Answer:

Objects that float on water have densities less than the density of water; those that do not float on water have densisties greater than the density of water:

Float on water:  d < 0.0361 lb/in³ (where d denotes denisity)

Do not float on water:  d > 0.0361 lb/in³

Explanation:

I don't know if this works for it or not?

Answer:

engineers are people who fix or invent items that will support people’s lives. For fun, engineers may construct unique items that is hard to invent.

Explanation:

If you need more info, pls comment.

Answer:

An engineer uses science, technology and math to solve problems. It designes machinery, build skyscrapers and oversee public works.

The state must put aside $66,415,794.83 to build the highway, assuming money is invested in an account that earns 3% per year.

Given that the project is a 3-year project, the cost of the project will be $21 million in year 1, and costs are expected to increase by 5% each year due to anticipated design modifications. The state regulations require that the money must be set aside at the beginning of the project to cover the entire project cost. We are to determine the amount of money that should be set aside to build the highway, assuming money is invested in an account that earns 3% per year.To determine the total cost of the project, we can use geometric progression. The first term is 21 and the common ratio is 1.05. Thus the total cost, T = 21 + 21 × 1.05 + 21 × 1.05²We know that the formula for the sum of a geometric progression is given as:S = (a₁(1 - rⁿ))/(1 - r)where;S = the sum of the terms,a₁ = the first term,r = the common ratio,n = the number of termsSubstituting the values of a₁, r and n in the equation above, we get;T = 21 + 21 × 1.05 + 21 × 1.05²= 21(1 + 1.05 + 1.05²)= 21 × (1 - 1.05³)/(1 - 1.05)= 21 × (1 - 1.15763)/(-0.05)= $66,415,794.83.

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Answer:

Answer:

Explanation:

Like requested the following function is written in JavaScript and prompts the user for a total amount of Kenyan Currency that needs to be converted. It then places that value in a variable and divides it by 115 Ksh so that it gives us the USD value of that currency. Then that value is returned. The function can be attached to any button but it must be done manually when creating the button's onClick method.

function convertCurrency() {

 var KenyanAmount = prompt("Please enter the amount of Kenyan you want to convert.");

 var usdValue = "$" + (KenyanAmount / 115);

 return usdValue;

}

The program is a sequential program, and does not require loops and conditional statements

The function in JavaScript where comments are used to explain each line is as follows:

//This defines the function

function convertCurrency() {

//This gets input for the amount to convert

var Amount = prompt("Kenyan Shillings: ");

//This converts the Kenyan Shillings to US Dollars

var usdValue = KenyanAmount / 115;

//This returns the converted amount to the main method

return usdValue;

}

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A sinusoidal waveform's average voltage (VAV) is calculated by multiplying the peak voltage value by the constant 0.637,which is equal to two divided by pi.

A waveform's level that is determined by the requirement that the region enclosed by the curve above it is exactly equal to the region enclosed by the curve below it.

The amount of power averaged throughout time is referred to as average power. By averaging the instantaneous power's time throughout a single cycle, we may determine average power.

By multiplying the peak value by 0.637 or the RMS value by 0.9, average or mean voltage and current values may be derived that can be used to calculate the same amount of power consumption as for analogous DC values. When converting from AC to DC, the average or mean value is frequently utilized (rectification).

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1) Note that the statement that best describes a hypothesis is: "a statement about an observation that can be tested." (Option A)

2) Of the statements about data visualization, the following are TRUE:

A hypothesis is an explanation provided for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific process implies that one can test it.

Scientists often establish scientific hypotheses on past data that cannot be adequately explained by existing scientific ideas.

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Answer:

  your answer is correct

Explanation:

You have the correct mapping from inputs to outputs. The only thing your teacher may disagree with is the ordering of your inputs. They might be written more conventionally as ...

 A B Y

 0 0 1

 0 1 0

 1 0 0

 1 1 1

That is, your teacher may be looking for the pattern 1001 in the last column without paying attention to what you have written in column B.

Answer:

Turn-on and turn-off characteristics of an SCR are called the dynamic characteristics of the SCR.

The formation of frost on an airplane wing will cause disruption in the smooth airflow over the wing.

In Frost formation, it does not alter the basic aerodynamic shape of the wing, but the roughness of its surface leads to the smooth flow of air, and it is one that will lead to an increase in drag and an early airflow separation over the wing, leading to a loss of lift.

Therefore, The formation of frost on an airplane wing will cause disruption in the smooth airflow over the wing.

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Compare similar sites:

1. Compare the design, layout, and navigation of each site.
2. Compare the content, including the quality and quantity of text, images, video, and audio.
3. Compare the performance of the sites, such as page loading speed, usability, and responsiveness.
4. Compare the features of each site, including search functionality, account creation, ecommerce features, and more.
5. Compare the SEO performance of each site, such as keyword targeting, backlinks, and domain authority.
6. Compare the analytics data from each site to get an idea of user behaviour and engagement.
7. Compare the user feedback from each site to get an idea of user satisfaction.

What is sites?
Sites are a word used to describe webpages or websites. A website is a collection of related webpages, images, videos, and other digital assets that are hosted on a server, and accessed through a domain name or URL. A website can contain a range of different types of content, such as text, images, audio, video, and other interactive elements. Websites are typically used to provide information, services, or products to people around the world, and to connect people with one another. Websites are created and maintained by web developers and designers, and are typically hosted on web servers.

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Plan 2 rental option should be recommended as the annual worth of Plan 2 rental is $90,800. Therefore, Plan 2 is the most economical option.

Given the following data:

Lease, Plan 1:

Initial investment = $60,000

Contract period = 5 years

Lease operating cost per metric ton of concrete = $0.50 per metric ton

Pumping capacity = 100 metric tons per day

Rental, Plan 2:

Rental cost = $17,000 per year

Additional operating labor cost per day = $20.5

Leasing option in Plan 1 will require an initial investment of $60,000 to lease the equipment, whereas Plan 2 will cost $17,000 per year, which includes $20.5 per hour labor cost that needs to be incurred for operating the rented equipment per 8-hour day.

Annual worth of Plan 1

Lease operating cost per metric ton of concrete = $0.50 per metric ton

Pumping capacity = 100 metric tons per day

Lease Option:

Optimistic: Lease operating cost = $0.40 per metric ton

Most likely: Lease operating cost = $0.50 per metric ton

Pessimistic: Lease operating cost = $0.95 per metric ton

Operating days = 45 per year

Since the operating days per year is only 45, hence total metric tons of concrete pumped per year = 100 × 45 = 4500 metric tons per year.

Annual worth of the lease of Plan 1 (optimistic)

Operating cost per year = 4500 × 0.40 = $1,800

Depreciation cost per year = D5(A/P, 13%, 5)

Depreciation cost per year = 60,000(0.2633) = $15,798

Annual worth of lease (optimistic) = Operating cost + Depreciation cost = $1,800 + $15,798 = $17,598

Annual worth of the lease of Plan 1 (most likely)

Operating cost per year = 4500 × 0.50 = $2,250

Depreciation cost per year = D5(A/P, 13%, 5)

Depreciation cost per year = 60,000(0.2633) = $15,798

Annual worth of lease (most likely) = Operating cost + Depreciation cost = $2,250 + $15,798 = $18,048

Annual worth of the lease of Plan 1 (pessimistic)

Operating cost per year = 4500 × 0.95 = $4,275

Depreciation cost per year = D5(A/P, 13%, 5)

Depreciation cost per year = 60,000(0.2633) = $15,798

Annual worth of lease (pessimistic) = Operating cost + Depreciation cost = $4,275 + $15,798 = $20,073

Annual worth of Plan 2

Rental cost per year = $17,000

Labor cost per year = 20.5 × 8 × 45 = $73,800

Annual worth of rental = Rental cost + Labor cost = $17,000 + $73,800 = $90,800

Comparison of annual worths

Annual worth of the lease (optimistic) > Annual worth of the rental

Annual worth of the lease (most likely) < Annual worth of the rental

Annual worth of the lease (pessimistic) < Annual worth of the rental

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The length of the string is approximately 0.50 m.

To find the length of the string, we can use the formula T = 2π√(L/g), where T is the period of the oscillations, L is the length of the string, and g is the acceleration due to gravity.
First, we need to find the period of one oscillation. The student found that 10 oscillations take 12.0 s, so the period of one oscillation is 1.2 s (12.0 s ÷ 10).
Next, we can use the formula T = 2π√(L/g) and solve for L. Rearranging the formula, we get L = g(T/2π)^2.
We know that g is approximately 9.81 m/s^2 and T is 1.2 s, so plugging in those values we get:
L = 9.81 m/s^2 × (1.2 s/2π)^2
L ≈ 0.50 m
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Answer:

Gasoline is injected directly into the cylinder.

Explanation:

In a direct injection system, the air and gasoline are not pre-mixed. Rather, air comes in using the intake manifold, while the gasoline is injected directly into the cylinder.

A prefix expression is an expression where the operator comes before the operands. It is evaluated by starting from the left and performing the operation specified by each operator.

The prefix expression "+3+313 333" can be evaluated as follows:

The operator "+" is encountered.

The next operand is "3". The current result is 3.

The operator "+" is encountered again.

The next operand is "3". The current result is added to 3, resulting in 6.

The operator "+" is encountered once more.

The next operand is "313". The current result is added to 313, resulting in 319.

The final operand is "333". The current result is added to 333, resulting in 652.

Therefore, the value of the prefix expression "+3+313 333" is 652.

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One tool that you can use to automate the creation of local users in a Windows 10 workstation is the Command Prompt.

What are the tools to automate ?

The Command Prompt is one tool you may use to automate the creation of local users on a Windows 10 computer.

When creating new local users, you can use the "net user" command to specify things like their password, user account type, and full name.

For instance: net user <username> <password> /add

This will create a brand-new local user using the credentials <username> and <password>.

You can also use Windows PowerShell as a tool.

Compared to Command Prompt, Windows PowerShell is a more capable and flexible tool that lets you automate operations with scripts.

In Windows 10, you can create new local users by using the New-LocalUser cmdlet.

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Out of the given options, a single value or piece of data from a data series is known as a "data point." Therefore, the correct answer is option D.

Data points are the most basic unit of data in a chart or graph. They represent the value of a particular variable at a specific point in time. For example, if you are tracking the sales of a particular product over a period of time, each point on the chart would represent the sales figure for a specific month or quarter.Gridlines, on the other hand, are the horizontal or vertical lines that form a grid on the chart. They help to visually organize the data and make it easier to read.Tick marks are small marks or symbols that are used to indicate specific points or values on a chart. They are usually placed along the axis of the chart and help to provide a reference for the data.Finally, a trendline is a line that is added to a chart to represent the general trend or pattern of the data. Trendlines can be used to identify trends, predict future values, and help to visualize the relationship between variables.In conclusion, a data point is a single value or piece of data from a data series. It is the most basic unit of data in a chart or graph and represents the value of a variable at a specific point in time.

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The number of hectares of each crop he should plant are; 250 hectares of Corn, 500 hectares of Wheat and 450 hectares of soybeans

He grows corn, wheat and soya beans on the farm of 1200 hectares. Thus;

C + W + S = 12   ----(1)

It costs $45 per hectare to grow corn, $60 to grow wheat, and $50 to grow soybeans. Thus;

45C + 60W + 50S = 63750  -----(2)

He will grow twice as many hectares of wheat as corn. Thus;

W = 2C    ------(3)

Put 2C for W in eq 1 and eq 2 to get;

C + 2C + S = 1200

3C + S = 1200     -----(4)

45C + 60(2C) + 50S = 63750

45C + 120C + 50S = 63750

165C + 50S = 63750    ------(5)

Solving eq 4 and 5 simultaneosly gives;

C = 250 and W = 500

Thus; S = 1200 - 3(250)

S = 450

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Explanation:

Utilising the principles of a circular economy and making sure the products they purchase are not manufactured in a way that adversely affects the environment.

these categories

THE NATURE OF MATERIALS

Review Questions

2.1

The elements listed in the Periodic Table can be divided into three categories. What are these categories and give an example of each?

Answer

. The three types of elements are metals (e.g., aluminum), nonmetals (e.g., oxygen), and semimetals

Answer:

The outer diameter of the ball is 6.2138 cm

Explanation:

The formula to apply is ;

Heat loss ,

\(Q/t=kA*\frac{( T_1-T_2)}{d}\)

where ;

Q/t=total heat loss from the ball = 1600 w

k=coefficient of heat transmission through the ball= 2.75 W/m.˚C

A=area in m² of the ball with the coefficient of heat transmission

T₁=Hot temperature

T₂=Cold temperatures

d=thickness of the ball

Area of spherical ball using internal diameter, 3cm= 0.03 m will be

Radius = half the diameter = 0.03/2 = 0.015

Area = 4 *π*r²

Area = 4*π*0.015² = 0.002827 m²

Apply the formula for heat loss to get the thickness as:

1600 = {2.75 * 0.002827 *(250-30 ) }/d

1600 =1.711/d

1600d = 1.711

d=1.711/1600 = 0.001069 m

d= 0.1069

Using internal radius and the thickness to get outer radius as;

3 + 0.1069 = 3.1069 cm

Outer diameter will be twice the outer radius

2*3.1069 = 6.2138 cm

Answer:

The answer is below

Explanation:

Given:

kg (glass) = 0.78 W/m⋅K, ka (air) = 0.026 W/m⋅K, h1 = 10 W/m2⋅K, h2 = 25 W/m2⋅K, glass length = Lg = 3 mm = 0.003 m, Lo = 3 mm = 0.003 m, La = 12 mm = 0.012 Height = 1.5 m, width = 2.4 m, room temperature = T = 20°C. Therefore:

Total resistance per unit area is given as:

\(R"=\frac{1}{h_1}+\frac{L_g}{k_g}+\frac{L_a}{k_a} +\frac{L_o}{k_g}+\frac{1}{h_2} \\\\R"=\frac{1}{10}+\frac{0.003}{0.78}+\frac{0.012}{0.026} +\frac{0.003}{0.78}+\frac{1}{25} \\\\R"=0.1+0.00385+0.46154+0.00385+0.04\\\\R"=0.60924\ K.m^2/W\)

Area = A = height * width = 1.5 m × 2.4 m = 3.6 m²

The change in temperature = ΔT = 20 °C - (-5 °C) = 25 °C

The rate of heat loss is given as:

\(\dot {Q}=A*\frac{\Delta T}{R"}= 3.6*\frac{25}{0.60924}\\ \\\dot {Q}=147.73\ W\)

The inner surface temperature (Ti) is given as:

\(T_i=T-\frac{\dot {Q}}{A} *\frac{1}{h_1}\\ \\T_i=20-\frac{147.73}{3.6}*\frac{1}{10}=15.9\ ^oC\)

The yeast will need a source of carbon, nitrogen, and oxygen in order to produce vitamin C.

Yarrowia lipolytica is a yeast that can be genetically engineered to produce vitamin C. In order for the yeast to produce this vitamin, it will need a source of carbon, nitrogen, and oxygen. Carbon is needed for the yeast to produce energy, nitrogen is needed for the yeast to synthesize proteins, and oxygen is needed for the yeast to respire and produce energy. Additionally, the yeast will need a source of vitamin C precursors, such as glucose, fructose, and sucrose, in order to produce the vitamin. Finally, the yeast will need a source of vitamins and minerals, such as magnesium, iron, and zinc, in order to produce the vitamin.

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