Which of the following can be used to maintain the head pressure of a system with an air-cooled condenser?
a. fan cycling
b. condenser flooding valve
c. dampers or louvers
d. all of the above

Answer:

\(D=0.1160m\)

Explanation:

From the question we are told that:

Output Power \(P=1.2kw\)

Density \(\rho=1.29kg/m^3\)

Wind speed \(V=17.5mph=>7.8m/s\)

Efficiency \(\gamma=60\%=>0.60\)

Let Betz Limit

  \(C_p=\frac{16}{27}\)

Generally the equation for Turbine Efficiency is mathematically given by

  \(\gamma=\frac{P}{P'}\)

Where

P'=input power

 \(P' = In\ power\)

 \(P'=1/2*C_p*\rho u^3*A\)

 \(P'=1/2*C_p*\rho u^3*\frac{\pi}{4}*D^2\)

Therefore the blade diameter for a two-blade propeller type rotor is

 \(\gamma=\frac{P*2*27*4}{16*\rho u^3*\pi*D^2}\)

 \(D^2=\frac{P*2*27*4}{16*\rho u^3*\pi*\gamma}\)

 \(D^2=\frac{1.2*2*27*4}{16*1.29*7.91^3*\pi*0.60}\)

 \(D^2=0.0135\)

 \(D=\sqrt{0.0135}\)

 \(D=0.1160m\)

Answer:

0.1160

Explanation: give them brainliest they deserve it

The horizontal component of force exerted by pin A on member ABCD is zero, and the vertical component is 65 lb upward.

The horizontal component of force exerted by pin B on member ABCD is zero, and the vertical component is 65 lb downward.

The horizontal component of force exerted by pin C on member ABCD is zero, and the vertical component is 65 lb.

In this system, the forces acting on member ABCD are determined by the pin connections at points A, B, and C. Since the slot in member ECF is smooth, it does not exert any forces on member ABCD. Let's analyze each pin separately:

Part 1) Pin A is attached to member ABCD at point A. Since the slot in member ECF is smooth, there is no horizontal force acting on member ABCD at point A. The vertical component of the force exerted by pin A is equal to the weight of the system, which is 65 lb upward.

Part 2) Pin B is attached to member ABCD at point B. Similar to pin A, there is no horizontal force exerted by pin B on member ABCD. However, the vertical component of the force exerted by pin B is equal to the weight of the system, which is 65 lb downward. The direction is downward because pin B is positioned below the center of gravity.

Part 3) Pin C is attached to member ABCD and passes through the smooth slot in member ECF. As with pins A and B, there is no horizontal force exerted by pin C on member ABCD. The vertical component of the force exerted by pin C is equal to the weight of the system, which is 65 lb.

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Answer:

These formal systems state exactly what work is to be done, where and when. In many organisations, people doing the actual work are required to sign a permit to work document to confirm that they have understood all processes and guidelines of the system. Permits also serve as a means of communication between site workers and the organisation’s management.

However, they should not be mistaken as a replacement for robust risk assessment, which should happen simultaneously. Having a permit to work systems as part of organisational operations reduces the risks of losses or damage due to unsafe activities in a non-trivial work atmosphere.

These systems ensure that the correct jobs are entrusted to appropriate individuals and review or audit of conditions are also undertaken by experts or authorised personnel who have proven capabilities of undertaking the respective responsibilities. Permit to work systems also confirms that work is completed safely and the workplace is restored to its safe, original form for normal operations to commence.

(a) The type of explosion that could occur inside the reactor vessel depends on the circumstances, but a criticality accident is one potential type in a nuclear reactor.

(b) An explosion during cleaning operations in the reactor vessel can happen due to flammable gas buildup, ignition sources, or vessel containment failure.

(a) The type of explosion that could occur inside the reactor vessel depends on the specific circumstances and materials involved.

In a nuclear reactor, a nuclear explosion, known as a criticality accident, is one potential type of explosion that can happen if there is an uncontrolled chain reaction of nuclear fission.

(b) An explosion in the reactor vessel during the cleaning operation can occur due to various factors.

If there is a breach or failure in the vessel's containment structure, allowing high-pressure gases or steam to accumulate, an explosion may happen when the pressure exceeds the vessel's capacity.

Proper safety measures and protocols, including careful handling of hazardous materials, maintaining appropriate ventilation, and rigorous inspection of the vessel's integrity, are essential to prevent such explosions during cleaning operations.

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To determine the required average compressive strength for a new plant when the specific strength (s) is unknown, the desired concrete strength of 5500 psi is considered.

The required average compressive strength can be determined by considering the strength characteristic of the concrete. The specific strength (s) represents the ratio of the actual strength of concrete to the specified strength. In this case, the specified strength is 5500 psi.

To calculate the required average compressive strength, we can set up an equation where the specified strength is equal to the product of the average compressive strength and the specific strength (s):

5500 psi = average compressive strength * s

Since the specific strength (s) is unknown, we rearrange the equation to solve for the average compressive strength:

average compressive strength = 5500 psi / s

By knowing the specified strength and the specific strength (s), we can determine the required average compressive strength for the new plant.

In conclusion, to determine the required average compressive strength for a new plant when the specific strength (s) is unknown, the specified strength and the specific strength (s) need to be considered. By rearranging the equation and dividing the specified strength by the specific strength, the required average compressive strength can be calculated.

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The fluid control function of a fluid power system controls system pressure and fluid flow rate, and it also regulates fluid direction and distribution.

Fluid Direction and Distribution: In addition to controlling pressure and flow rate, the fluid control function governs the direction and distribution of fluid within the system. Directional control valves, such as solenoid valves or manual valves, are used to determine the pathways and routes through which fluid flows. By actuating these valves, the fluid control function directs the fluid to specific actuators, cylinders, or other components, enabling precise control over the system's operation.

Fluid control also involves managing the distribution of fluid among various branches or circuits within a fluid power system. This is achieved through the use of manifold systems, which consist of interconnected valves and passages that control the flow distribution to different parts of the system. By selectively opening or closing valves within the manifold, the fluid control function ensures that the fluid is appropriately distributed to the desired areas of the system.

The fluid control function in a fluid power system encompasses the regulation of system pressure, fluid flow rate, fluid direction, and fluid distribution. By effectively managing these aspects, the fluid control function enables precise control, efficient operation, and reliable performance of the fluid power system.

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The bellman-ford shortest path algorithm works on graphs with negative edge weights, but not negative edge weight cycles.

Define an algorithm.

A finite sequence of exact instructions is known as an algorithm in mathematics and computer science. Algorithms are frequently used to solve a class of particular problems or to carry out computations. For carrying out calculations and data processing, algorithms are used as specifications.

A method used to solve a problem or carry out a command is known as an algorithm. Algorithms are precise lists of instructions that, in either software or hardware-based routines, carry out predetermined actions step by step.

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True. That is a common form of social engineering known as "impersonation" or "pretending to be an authority."

What is social engineering?

In this type of attack, the attacker poses as an authorized user or administrator in order to trick someone into giving them sensitive information, such as passwords or confidential data.

This type of attack can be particularly effective because people often trust authority figures and may be more likely to comply with their requests.

To protect against impersonation attacks, it is important to be vigilant and to verify the identity of anyone who claims to be an authorized user or administrator, especially if they are requesting sensitive information.

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Answer:

Answer:

Dams are massive structures constructed across rivers or streams to store water, control floods, generate hydroelectric power, provide irrigation, and regulate water supply. Here are five functions of a dam:

1- Water storage: One of the primary functions of a dam is to store water in a reservoir, which can be used for various purposes such as irrigation, industrial processes, and drinking water supply.

2- Flood control: Dams can control the flow of water in a river or stream, thereby reducing the risk of floods downstream. During heavy rainfall or snowmelt, the dam can hold back the excess water and release it slowly to prevent downstream flooding.

3- Hydroelectric power generation: Dams can also generate electricity by using the water flow to turn turbines, which powers generators. This is a clean and renewable source of energy that can provide electricity to homes, businesses, and industries.

4- Navigation: Dams can create a navigable channel by regulating the water level, which allows boats and ships to travel upstream and downstream. This can improve transportation and commerce in the region.

5- Recreation: Dams can create recreational opportunities such as boating, fishing, and swimming in the reservoirs and rivers that are created by the dam. This can also provide economic benefits by attracting tourists and visitors to the region.

The total capacitance of a series combination of capacitors can be calculated by using this formula: 1/(1/C₁ + 1/C₂ + 1/C₃ + 1/C₄).

Basically, the components of an electrical circuit can be connected or arranged in two forms and these are;

Mathematically, the total (equivalent) capacitance (\(C_{eq}\)) of an electrical circuit containing capacitors which are connected in series can be calculated by using this formula:

1/Ceq = 1/C₁ + 1/C₂ + 1/C₃ + 1/C₄

Ceq = 1/(1/C₁ + 1/C₂ + 1/C₃ + 1/C₄).

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Answer:

  0.006174 in

Explanation:

The thermal expansion coefficients I found were ...

  5.8×10^-6/°F for gray cast iron

  7.2×10^-6/°F for structural steel

Then the difference in expansion dimensions for a 42-inch length will be ...

  (42 in)((7.2 -5.8)×10^-6/°F)(165 -60)°F = (42 in)(1.4×10^-6)(105) = 0.006174 in

The difference in thermal expansion over that temperature range will be about 0.006174 inches.

Answer:

The operating principle of a ramp type digital voltmeter is to measure the time that a linear ramp voltage takes to change from level of input voltage to zero voltage (or vice versa).

The use of extra pads for outriggers in crane operations is beneficial for stability and safety. However, it is important to follow safety guidelines and not stack the pads on top of each other. These pads should be placed in a single layer to spread the load evenly and improve overall stability. Placing extra pads in violation of safety guidelines is not safe.

Outriggers have an important role to play in safety and balance when it comes to crane operations, particularly in rugged terrains and areas with uneven soil, deep excavations, and heavy loads. The outrigger pads, which are made of wood, aluminum, or high-strength plastic, serve as a base for the outriggers to provide a secure foundation for the crane's support legs to work on the ground.

Hence, when the crane lifts heavy loads, the outrigger pads help to spread the load evenly across a wider surface area, reducing ground pressure and increasing stability.

Below are the true statements about extra pads for outriggers:

1. Extra pads for outriggers may be utilized to increase stability, but they must not be stacked on top of each other.

2. Extra pads for outriggers should be used to increase the surface area of support when working on rough or delicate surfaces.

3. Extra pads for outriggers may be placed in a manner that violates the correct safety guidelines.

4. Extra pads for outriggers may be utilized to boost the crane's ability to operate on a slope.

The incorrect statement among the alternatives is: Extra pads for outriggers may be placed in a manner that violates the correct safety guidelines.

When setting up an outrigger-supported crane, it is critical to follow the manufacturer's directions for proper outrigger positioning, including ground conditions, pad positioning, and leveling. The pads should be placed in a single layer to improve the crane's overall safety and stability. Also, the pads should be used in compliance with the specified load capacity, and the crane should never be operated beyond its rated capacity.

Therefore, it is not safe to place extra pads in such a manner that it violates the safety guidelines.

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Explanation:

mathematics education grade 7

Answer:

Stop Sign

Explanation:

It's red and shaped like an octogon

The magnitude of the electric field due to a point source charge decreases as the distance from the source charge increases.

As the distance from a point source charge increases, the magnitude of the electric field it produces decreases. This is a result of the inverse-square law, which states that the intensity of the electric field diminishes as the square of the distance from the source. As the distance increases, the electric field spreads out over a larger area, resulting in a decrease in its strength. This behavior is consistent with the concept that electric field lines emanate radially outward from a point charge and become less concentrated as they move farther away.

In summary, the magnitude of the electric field due to a point source charge diminishes as the distance from the charge increases, following the inverse-square law.

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Answer:

Not a good idea.

Explanation:

You don't want the vehicle moving while it's on a lift, so do not lift it up on a moving part.

Answer:

Explanation:

Wow

Answer:

The intake and exhaust ports

Explanation:

The intake manifold function is to channel air through the passages in the cylinder head and into the combustion chamber.

(hope this help) :)

Answer:

rain

Explanation:

evaoration causes clouds

clouds condense and rain

Answer:

rain

Explanation:

The equijoin operation in database management systems is a type of join operation where two tables are joined based on an equality condition on one or more matching columns.

The name "equijoin" is derived from the comparison operator "=". In other words, an equijoin is performed when a query involves the matching of columns between two tables, and the comparison is based on the equality operator.

The equijoin operation is an essential tool in database management systems and is widely used in many applications. It is particularly useful when retrieving information from multiple tables, such as in a data warehouse or in a business intelligence system. The equijoin operation is also a fundamental operation in the SQL language, which is the standard language used for managing relational databases.

In summary, the name "equijoin" comes from the comparison operator "=" used in the condition to join two tables. This operation is critical in database management systems, and it is commonly used in various applications.

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The cylinder's radius before distortion is 7.5mm.

We learn that from the question that was asked;

The cylinder's cold work radius is 10mm.

Difficulty = 25%

Identify the radius prior to distortion.

Radius prior to deformation: (1-0.5) + 10

Radius before distortion equals 0.75 x 10

Radius = 7.5mm before deformation

Consequently, the cylinder's radius before distortion is 7.5 mm.

The radius of a circle is the distance a circle's center from any point along its perimeter. Usually, "R" or "r" is used to indicate it. In practically all formulas involving circles, this amount is significant. In terms of radius, a circle's area and circumference are also calculated.

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Answer:

I think A is correct

The two technicians are right in their given assessment about the use of collapsible steering columns and collapsible brake pedals to reduce the risk of trapping the driver's feet.

This refers to the vehicular movement from one point to another, obeying traffic rules, and respect for other drivers and pedestrians.

Hence, we can see that with regards to safe driving, the opinions of both Technicians A and B are both correct as they both want the safety of the car and the driver.

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Answer:

To run. The machine one at a time

Explanation:

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Answer: Kristin is currently modifying a newly discovered plastic material to work on a new lightweight lacrosse stick.

Explanation:

The main function of a materials engineer is to develop, study and test materials that are used on order to make different products.

Material engineer solve problems in other engineering fields, like electrical, aerospace, civil, mechanical, chemical, and nuclear.

From the information given in the question, the correct option is "Kristin is currently modifying a newly discovered plastic material to work on a new lightweight lacrosse stick."

Answer:

nice

Explanation:

The engineers should use dimensions of approximately 8.93 ft by 8.93 ft by 6.67 ft to create an acceptable aquarium with the least amount of glass.

To minimize the amount of glass used in the aquarium, the engineers should choose dimensions that minimize the surface area of the aquarium while still holding 500 ft^3 of water.

Since the aquarium has a square bottom, let x be the length of one side of the bottom, and let h be the height of the aquarium. Then the volume of the aquarium is given by:

V = x^2 h

We want to find the values of x and h that satisfy the constraint V = 500 ft^3 and minimize the surface area of the aquarium. The surface area of the aquarium is given by:

A = x^2 + 4xh

To minimize A subject to the constraint V = 500 ft^3, we can use the method of Lagrange multipliers. The Lagrangian function is:

L(x,h,λ) = x^2 + 4xh + λ(500 - x^2 h)

Setting the partial derivatives of L with respect to x, h, and λ equal to zero, we get:

2x + 4h - λx^2 = 0

4x - λx^2 = 0

500 - x^2 h = 0

From the second equation, we get:

λ = 4/x

Substituting this into the first equation, we get:

2x + 4h - (4/x)x^2 = 0

Simplifying, we get:

x^3 + 2hx - 1000 = 0

We can solve this equation for x numerically using a calculator or computer program. The positive solution is:

x ≈ 8.93 ft

Substituting this back into the third equation, we get:

h ≈ 6.67 ft

Therefore, the engineers should use dimensions of approximately 8.93 ft by 8.93 ft by 6.67 ft to create an acceptable aquarium with the least amount of glass.

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Answer:

7.5 feet

Explanation:

45 divided by 6 is 7.5

Answer:

7.5 feet

Explanation:

45 divided by 6 is 7.5

Answer: hello the diagram related to your question is missing please the third image is the missing part of the question

Fx = 977.76 Ib/ft

Explanation:

Estimate the force that water exerts on the pier

V = 12 ft/s

D( diameter ) = 6 ft

first express the force  on the first half of the cylinder  as

Fx1 =  - \(-2\int\limits^\pi _\frac{\pi }{2} {Ps*cos\beta *a} \, d\beta\)   ---------------- ( 1 )

where ; Fy = 0

Ps = Po + 1/2 Pv^2 ( 1 - 4 sin^2β )  ------------- ( 2 )

Input equation (2)  into equation ( 1 )         (note :  assuming Po = 0 )

attached below is the remaining part of the solution