If you use the ALTER TABLE statement to add a primary key, the primary key column(s) must already have been

Answer:

genorator- electrical to mechanical

motor- mechanical to electrical

Answer:

Sole Proprietorship, General Partnership , Limited Partnership, corporation

Explanation:

Business in something that an individual or a group of people do for a living and produce products and services that benefits the society and the people. There are several entities that can be common in business. Some common form of entities are :

Sole Proprietorship : One to one

-- here there is only one owner in the business and he maintains and manages the entire business functions under his control.

Limited Partnership : many to one

-- here two or more than two partners establish business and runs it but only one or more is liable to the amount of the investments.

General Partnership : many to many

-- It is a business partnership where all the partners shares the profits, the assets, legal liabilities and financial liabilities, etc.

Corporation : many to one

It is a business entity where a group of individual or a group of companies run a single business which is generally authorized by the state.

Some of the typical types of the entities that one may think to be common in term of the business entities are about the relationships that are held within many to many and one to many.

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Some crawl space foundations are completely sealed without any vents because it is believed to be more energy-efficient and helps prevent moisture from entering the crawl space. However, this can also lead to the buildup of harmful gases, such as radon, and make it difficult to regulate temperature and humidity levels.

What are crawl space foundations?

Crawl space foundations are a type of foundation commonly used in residential and small commercial construction. They are built by creating a shallow space between the ground and the bottom of the first floor of the building. This space is typically about two to four feet in height and is called a crawl space because it is only large enough for someone to crawl through.

The foundation walls of a crawl space are typically made of concrete or masonry, and they rest on footings that are placed below the frost line to prevent damage from soil movement. The floor of the crawl space may be a poured concrete slab or simply a dirt floor.

Crawl space foundations have several advantages over other types of foundations. They are typically less expensive to build than full basements or slab-on-grade foundations, and they provide easier access to plumbing and electrical systems that may need to be installed or repaired. Crawl spaces can also be used for storage in some cases.

Therefore, it is important to properly insulate and ventilate sealed crawl spaces to ensure proper air circulation and prevent potential health hazards. Additionally, proper drainage systems should be installed to prevent water buildup and damage to the foundation.

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the thermal efficiency of the car engine operating on an air-standard Diesel cycle is approximately 0.529, or 52.9%.

To find the thermal efficiency of an ideal-gas propane engine operating on an air-standard Otto Cycle, we can use the following formula:

Thermal efficiency (η) = 1 - (1 / compression ratio)^(specific heat ratio - 1)

Given:

Compression ratio (r) = 10

Specific heat ratio (k) = 1.4

Substituting the values into the formula:

η = 1 - (1 / 10)^(1.4 - 1)

  = 1 - (1 / 10)^0.4

  = 1 - 0.631

  = 0.369

Therefore, the thermal efficiency of the spark-ignition (SI) engine operating on an air-standard Otto Cycle is approximately 0.369, or 36.9%.

To find the thermal efficiency of a car engine operating on an air-standard Diesel cycle, we can use the following formula:

Thermal efficiency (η) = 1 - (1 / (compression ratio * cutoff ratio))^(specific heat ratio - 1)

Given:

Compression ratio (r) = 10

Cutoff ratio (rc) = 3

Specific heat ratio (k) = 1.4

Substituting the values into the formula:

η = 1 - (1 / (10 * 3))^(1.4 - 1)

  = 1 - (1 / 30)^0.4

  = 1 - 0.471

  = 0.529

Therefore, the thermal efficiency of the car engine operating on an air-standard Diesel cycle is approximately 0.529, or 52.9%.

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Answer:

Explanation:

The correct answer is "D. This device converts the chemical energy of hydrogen into electricity through a chemical reaction with oxygen or another oxidizing agent."

A talks about bio-ethanol fuel.

B is solar.

C is fossil.

E is electricity generation.

Answer:

Explanation:

ans is:

This device converts the chemical energy of hydrogen into electricity through a chemical reaction with oxygen or another oxidizing agent. O D

Energy demand refers to the amount of energy required to fulfill the needs of a particular system, sector, or country. It is a measure of the total energy required to support various activities and services. On the other hand, energy consumption refers to the actual amount of energy used by an individual, organization, or country. It represents the energy that is utilized and converted into useful work.

Energy demand and energy consumption differ in terms of their scope and purpose. Energy demand focuses on the total energy required, taking into account factors such as population, economic growth, and technological advancements. It helps in understanding the overall energy requirements and planning for future energy sources and infrastructure.

Energy consumption, on the other hand, is the actual energy used by end-users. It reflects the efficiency of energy use and can be influenced by factors such as energy-saving technologies, behavior, and conservation measures. Monitoring energy consumption helps identify areas of improvement and enables the implementation of energy-efficient practices.

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Answer:

the pressure at a closed valve attached to the tank 10 ft above its bottom is 37.88 psi

Explanation:

Given that;

depth 1 = 71 ft

depth 2 = 10 ft

pressure p = 17 psi = 2448 lb/ft²

depth h = 71 ft - 10 ft = 61 ft

we know that;

p = P_air + yh

where y is the specific weight of ethyl alcohol ( 49.3 lb/ft³ )

so we substitute;

p = 2448 + ( 49.3 × 61 )

= 2448 + 3007.3

= 5455.3 lb/ft³

= 37.88 psi

Therefore, the pressure at a closed valve attached to the tank 10 ft above its bottom is 37.88 psi

Answer:

the base-emitter junction is open and the emitter resistor is open

Explanation:

Because here there will be no base current only when the the base emitter junction is kept open and. Also when emitter resistor is kept open or with thus there will be no voltage drop across the Resistor meaning the base voltage Will be equal to that in the voltage divider circuitry

Answer:

0.02795 m

Explanation:

Neglecting shaft weight Design the shaft using maximum shear stress theory and determine the required diameter

factor of safety = 1.5

length of shaft = 10 meters

material yield strength = 350 MPa

Torque = 500 N.m

The required shaft diameter = 0.02795 m

attached below is a detailed solution of the problem

Answer:

TRUE

Explanation: I think

protecting the ecosystem saves the species is true because a lot of species lives in the ecosystem and is there habitat / i think

When the normally open reset input is closed, the sequencer instruction resets to the first output pattern.

In a sequencer or programmable logic controller (PLC), the reset input is a control signal that, when activated by closing a normally open switch or contact, causes the sequencer to return to its initial state. This reset action clears any previous outputs and sets the sequencer to start executing from the beginning, typically the first output pattern. It allows for the reinitialization of the sequencer's operation, ensuring consistent and predictable behavior. By opening and closing the reset input, the sequencer can be reset and restarted as needed during the control process.

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Answer:

A,C and E

Explanation:

It should be understood that a function generator can be explained as a piece of electronic test equipment or software which is used in generating different types of electrical waveforms over a wide range of frequencies. It should be noted that some of the examples of waveforms produced by the function generator are the sine wave, square wave, triangular wave and sawtooth shapes.

Therefore, the reason why of picking the options as highlighted above.

A two-opening superimposed waveguide directional coupler is a type of directional coupler that consists of two waveguides that are positioned parallel to each other.

The operating principle of a two-opening superimposed waveguide directional coupler is based on the interaction between the electromagnetic fields of the two waveguides.

When a signal is introduced into one waveguide, it creates an electromagnetic field that extends into the adjacent waveguide. The strength of the electromagnetic field in the adjacent waveguide depends on the separation distance between the two waveguides.

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Answer:

Texas because it is not hardware it is a country name

Answer:

The first five terms of the given geometric sequence are

8,40,200,1000,5000

Explanation:

:)

Answer:

B. attenuation

Explanation:

Attenuation is when your signal is lost or reduced as it travels from the transmitter to the receiver. Moisture is typically conductive, so it will cause a signal to be redirected, and the further the signal has to travel, the more attenuation (loss). The best path for the signal is a direct path from point A to point B, but conductive elements cause signals to "lose strength" because they take a different path before eventually reaching the destination.

Moisture is also a required component for corrosion, which is devastating to communication components, and another reason for signal attenuation.

Answer:

A) F = 0.011 N

B) ΔP = 5.6 N/m²

Explanation:

We are given;

surface tension coefficient; S = 0.07 N/m

Radius; r = 2.5 mm = 0.025 m

A) Formula to find the surface tension force(F) is given by;

F = SL

Where L is effective length = 2πr

F = 0.07 × 2π × 0.025

F = 0.011 N

B) Formula for difference in pressure droplet is;

ΔP = 2S/r

Thus;

ΔP = (2 × 0.07)/0.025

ΔP = 5.6 N/m²

The correct answer is A.Scenario 1: Broken SidewalkPerson's velocity = walking velocity, opposite direction of the sidewalk's directionScenario 2: Riding SidewalkPerson's velocity = sidewalk's velocity.

same direction as the sidewalk's directionScenario 3: Walking and Riding SidewalkPerson's velocity = (walking velocity + sidewalk's velocity), same direction as the sidewalk's directionWhen the sidewalk is broken, the person's velocity is equal to their walking velocity. Therefore, to find the person's velocity, we need to divide the length of the sidewalk by the time it takes to walk the full length:velocity = distance/time = 87m/106s = 0.82 m/sWhen the person is just riding the sidewalk without walking, their velocity is equal to the velocity of the sidewalk itself. Therefore, we can use the same equation as in part B, but with the different time:velocity = distance/time = 87m/66s = 1.32 m/sWhen walking and riding the sidewalk at the same time, the person's velocity is the sum of their walking velocity and the sidewalk's velocity

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Answer:

Soap and water

Explanation:

   then report the injury....

Answer:

C) Skull and crossbones

Explanation:

Its on the OSHA website under HCS Pictograms and Hazards

Answer:

 So its area A = 4 * 4sqrt(2) = 16sqrt(2) inches^2

Explanation:

In order to find the area of the section, we need to find the length of one of the diagonals.

Using the Pythagorean Theorem, a^2 + b^2 = c^2, we pick any side of the cube which in

itself is a square with sides 4 inches each.  The length of the diagonal of the square is

2(4^2) = c^2  or c = 4sqrt(2).

To calculate the area of the section, we must first determine the length of one of the diagonals. Using the Pythagorean Theorem, \(\bold{a^2 + b^2 = c^2}\), one selects any side of the cube which in its a square with four-inch sides.

           \(\to 2(4^2) = c^2 \\\\ \to c = 4\sqrt{(2)}\)

      \(\to A = 4 \times 4\sqrt{(2)} = 16\sqrt{(2)}\ inches^2\)

Therefore, the answer is "\(\bold{ 16\sqrt{(2)}\ inches^2}\)".

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The non-digital data storage item most similar to a database among the given options is A) library card catalog.

A library card catalog is an organized system for tracking the books and materials available in a library. It functions as a database because it stores and categorizes data, making it easy to search and retrieve information about the library's resources. Just like a digital database, a card catalog contains structured data with a specific set of fields (such as title, author, and publication date) for each entry. This enables users to search for and locate the desired materials efficiently.

The other options, such as cash register receipts (B) and doctor's office invoices (C), do store data but lack the systematic organization and searchability of a database. Option D, a list of sales totals on a spreadsheet, is closer to a database but still lacks the extensive organization and search capabilities typically associated with a database.

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Answer:

Hope this helps :)

1. Define/Find the problem.

2. Explore/Research/Collect information.

3. Design the best solution base on your ideas/thoughts.

4. Create the solution.

5. Try the creation, put it to test/work.

6. Make the creation better, modify it.

Also, some additional steps are ...

7. Evaluate the solution, finishing thoughts/ideas.

8. Share your results with other engineers/people, final steps

Answer:

Friction

Explanation:

Heavy objects take an extended way to get to a full halt, so they have a lot of friction.

An item with high weight is forced down to something like a surface of stronger power than an item with small weight and, as a result, there is a greater pressure between the base of the large weight than the one between ground and the small one.

Answer:

friction

Explanation:  It has a lot of mass so it will interact with the railroad. When you interact with the railroad, it is called friction. That will make the train slower.

Hope this helps! Stay Safe!

Hot combustion gases, modeled as air behaving as an ideal gas, enter a steady-state turbine at 145 psi, 2700oR, and exit at 29 psi and 1974oR. The power output is 74.26 hp, and heat transfer from the turbine to the surroundings occurs at a rate of 14 BTU/s.

Required:

a)Determine the power output of the turbine, in hp.

b) The Flow rate

Answer:

a) \(w=74.26hp\)

b) \(m=0.22\)

Explanation:

From the question we are told that:

Initial Pressure \(p_1= 145 psi\)

Initial Temperature \(T_1 =2700oR=>2240.33^oF\)

Final Pressure \(p_2= 29 psi\)

Final Temperature \(t_2=1974oR=>1514.33^oF\)

Output Power \(w=74.26hp\)

Heat transfer Rate \(Q=14BTU/s\)

Generally the equation for Steady flow energy is mathematically given by

 \(Q-w=m(h_2-h_1)\)

Where

 \(m=Flow\ rate\)

From Steam table

 \(h_1=704btu/ib (at\ p_1= 145\ psi,\ T_1 =2700oR=>2240.33^oF )\)

 \(h_2=401btu/ib (at\ p_2= 29psi\ t_2=1974oR=>1514.33^oF )\)

Therefore

 \(-14-74.26=m(401-704)\)

 \(m=\frac{-14-74.26}{(401-704)}\)

 \(m=0.22\)

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

Explanation:

Answer:

SECTION LEARNING OBJECTIVES

By the end of this section, you will be able to do the following:

Distinguish between static friction and kinetic friction

Solve problems involving inclined planes

Section Key Terms

kinetic friction static friction

Static Friction and Kinetic Friction

Recall from the previous chapter that friction is a force that opposes motion, and is around us all the time. Friction allows us to move, which you have discovered if you have ever tried to walk on ice.

There are different types of friction—kinetic and static. Kinetic friction acts on an object in motion, while static friction acts on an object or system at rest. The maximum static friction is usually greater than the kinetic friction between the objects.

Imagine, for example, trying to slide a heavy crate across a concrete floor. You may push harder and harder on the crate and not move it at all. This means that the static friction responds to what you do—it increases to be equal to and in the opposite direction of your push. But if you finally push hard enough, the crate seems to slip suddenly and starts to move. Once in motion, it is easier to keep it in motion than it was to get it started because the kinetic friction force is less than the static friction force. If you were to add mass to the crate, (for example, by placing a box on top of it) you would need to push even harder to get it started and also to keep it moving. If, on the other hand, you oiled the concrete you would find it easier to get the crate started and keep it going.

Figure 5.33 shows how friction occurs at the interface between two objects. Magnifying these surfaces shows that they are rough on the microscopic level. So when you push to get an object moving (in this case, a crate), you must raise the object until it can skip along with just the tips of the surface hitting, break off the points, or do both. The harder the surfaces are pushed together (such as if another box is placed on the crate), the more force is needed to move them.

Answer:

Object-Oriented Software Engineering Using UML, Patterns, and Java, 3e, shows readers how to use both the principles of software engineering and the practices of various object-oriented tools, processes, and products.