Transcribed image text: When is a task considered to be "unsupervised"? O A task is unsupervised when you are using labeled data. O A task is unsupervised when you are using unlabeled data. A task is unsupervised when you define a reward function. O All of the above. An application that uses data about homes and corresponding labels to predict home sale prices uses what kind of machine learning? O Supervised Unsupervised Reinforcement learning O All of the above An application that uses data about homes and corresponding labels to predict home sale prices uses what kind of machine learning? O Supervised Unsupervised Reinforcement learning All of the above Which of the following is not a reason why it is important to inspect your dataset before training a model? Data needs to be transformed or preprocessed so it's in the correct format to be used by your model Machine learning handles all of the reasoning about data for you. Understanding the shape and structure of your data can help you make more informed decisions on selecting a model. You can find missing or incomplete values. When checking the quality of your data, what should you look out for? Outliers Categorical labels O Training algorithms O All of the above What is the definition of model accuracy? O How often your model makes a correct prediction. How often your model makes similar predictions. How well the results mimic a specific shape of an algorithm. Does the prediction reflect reality. Which of the following is not a model evaluation metric? O Root Mean Square (RMS) Model Inference Algorithm Silhouette Coefficient O Accuracy Which of the following is only a characteristic of reinforcement learning? O Uses labels for training data. Does not use labels for training data. Uses a reward function. O All of the above. You are creating a program to identify dogs using supervised learning. What is not an example of a categorical label? Is a dog. O is not a dog. O May be a wolf. All of the above. In reinforcement learning, the agent: Receives reward signals from the environment for its actions. Is a piece of software you train to learn by interacting with an environment. Has a goal of maximizing its total reward over time. O All of the above. What are hyperparameters? Model parameters that change faster than most other model parameters during model training. Model parameters that have more of an impact on the final result than most other model parameters. Parameters within a model inference algorithm. O Parameters which affect model training but typically cannot be incrementally adjusted during training like other parameters. True or False: As part of building a good dataset you should use data visualizations to check for outliers and trends in your data. True False
Answers
1.A task is considered "unsupervised" when using unlabeled data.
2.Predicting home sale prices using data and corresponding labels is an example of supervised machine learning.
3.Inspecting the dataset before training a model is important to understand its shape, structure, identify missing values, and preprocess the data.
4.When checking the quality of data, one should look out for outliers, categorical labels, and training algorithms.
5.Model accuracy refers to how often the model makes correct predictions.
6.Silhouette Coefficient is not a model evaluation metric.
7.Reinforcement learning uses a reward function.
8."May be a wolf" is not an example of a categorical label.
9.In reinforcement learning, the agent receives reward signals, interacts with the environment, and aims to maximize total reward over time.
10.Hyperparameters are parameters that affect model training but cannot be incrementally adjusted during training.
11.True: Data visualizations are used to check for outliers and trends in the data.
1.A task is considered "unsupervised" when using unlabeled data because in unsupervised learning, the algorithm aims to find patterns, structures, or relationships in the data without the presence of labeled examples or a specific reward function guiding the learning process.
2.Predicting home sale prices using data and corresponding labels falls under supervised machine learning. This is because the model learns from labeled examples where the input data (features) and the corresponding output data (labels) are known, allowing the model to make predictions based on the learned patterns.
3.Inspecting the dataset before training a model is crucial to understand its characteristics, identify any missing or incomplete values, and preprocess the data to ensure it is in the correct format for the model to learn effectively.
4.When checking the quality of data, it is important to look out for outliers (extreme values that deviate from the normal range), categorical labels (representing different classes or categories), and training algorithms (ensuring they are suitable for the specific task).
5.Model accuracy refers to how often the model makes correct predictions. It measures the agreement between the predicted values and the true values.
6.Silhouette Coefficient is not a model evaluation metric. It is a measure of how close each sample in a cluster is to the samples in its neighboring clusters, used for evaluating clustering algorithms.
7.Reinforcement learning is characterized by the use of a reward function. The learning agent receives feedback in the form of rewards or penalties based on its actions, allowing it to learn through trial and error to maximize its cumulative reward over time.
8."May be a wolf" is not an example of a categorical label because it introduces uncertainty rather than representing a distinct category.
9.In reinforcement learning, the agent interacts with the environment, receives reward signals that indicate the desirability of its actions, and seeks to maximize its total reward over time by learning optimal strategies.
10.Hyperparameters are parameters that affect the training process and model behavior but are not updated during training. They need to be set before the training starts and include parameters like learning rate, regularization strength, and number of hidden units.
11.True: Data visualizations, such as scatter plots, histograms, or box plots, can help identify outliers, understand the distribution of data, and uncover trends or patterns that may be useful in the modeling process. Visualizations provide insights that help build a good dataset.
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Related Questions
Does a bridge anchored resting on two pillars have any torque?.
Answers
Answer: Yes, but it is at equilibrium
Explanation:
A ___________ is defined as a change in shape of the part between the damaged and undamaged area hat is smooth and continuous . When the part is straightened, it is returned to proper shape and state without any areas of permanent deformation.
Answers
A bend is defined as a change in the shape of the part between the damaged and undamaged area that is smooth and continuous.
What is a kink?
A kink can be defined as a sharp bend with a small radius over a short distance.
So when any part is kinked it must be replaced without any doubt. A part is kinked if it just doesn't work on the repair.
What is a bend?
Unlike a kink, a bend can be restored. That is after a bend also a part can be bought back to its original position.
When the part is straightened, it is returned to proper shape and state without any areas of permanent deformation.
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Visit a fire station and obtain information about flow rates through hoses and discharge diameters. Using this information, estimate the impulse force to which the firefighters are subjected when holding a fire hose.
Answers
Water flowing through a flexible fire hose is turbulent flow and consists of a flow field of eddies.
What is the explanation?An eddy-filled flow field characterizes the turbulent flow of water via a flexible fire hose. The pressure against the pipe wall is affected by the turbulent kinetic energy of these eddies because it is shifted from large eddies into smaller eddies. Accelerometers are sensitive to the types of pipe vibrations that are caused by pressure changes.Piezoelectric pressure transducers and piezoelectric accelerometers are two categories of sensors that have been utilized in the literature to measure fluid flow in rigid pipes. Clinch employed a collection of flush-mounted piezoelectric pressure transducers along a water pipe's inner surface to monitor pressure changes brought on by turbulent water flow [11]. The variations in flow rate and pressure were found to be related.
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In the first-order process,a blue dye reacts to form a purple dye. The amount of blue dye at the end of 1 hr is 480 g and the end of 3 hr is 120 g . Estimate the amount of the blue dye present initially
Answers
Answer:
The answer is 960 kg
Explanation:
Solution
Given that:
Assume the initial dye concentration as A₀
We write the expression for the dye concentration for one hour as follows:
ln (C₁) = ln (A₀) -kt
Here
C₁ = is the concentration at 1 hour
t =time
Now
Substitute 480 g for C₁ and 1 hour for t
ln (480) = ln (A₀) -k(1) ------- (1)
6.173786 = ln (A₀) -k
Now
We write the expression for the dye concentration for three hours as follows:
ln (C₃) = ln (A₀) -k
Here
C₃ = is the concentration at 3 hour
t =time
Thus
Substitute 480 g for C₃ and 3 hour for t
ln (120) = ln (A₀) -k(3) ------- (2)
4.787492 = ln (A₀) -3k
Solve for the equation 1 and 2
k =0.693
Now
Calculate the amount of blue present initially using the expression:
Substitute 0.693 for k in equation (2)
4.787492 = ln (A₀) -3 (0.693)
ln (A₀) =6.866492
A₀ =e^6.866492
= 960 kg
Therefore, the amount of the blue dye present from the beginning is 960 kg
For the systems described by the following equations, with the input x (t) and output y(t), determine which of the systems are linear and which are nonlinear. Dy / dt + 2y (t) = x2 (t) dy / dt + 3ty (t) = t2 x (t) 3y (t) + 2 = x (t) dy / dt + y2 (t) = x (t) (dy / dt )2 + 2y (t) = x (t) dy / dt + (sin t) y (t) = dx / dt + 2x (i) dy / dt + 2y (t) = x (t) dx / dt y (t) = f 1 -infinity x (tau) d tau
Answers
The first equation is linear, the second equation is nonlinear, the third equation is nonlinear, the fourth equation is nonlinear, the fifth equation is nonlinear, and the sixth equation is nonlinear.
What is equation?
An equation is an expression that contains an equal sign and relates two or more mathematical quantities. It typically consists of constants, variables, and symbols, and can be written in different forms such as standard form, slope-intercept form, and factored form. Equations are used to describe relationships between variables, and they can be used to solve a wide range of problems, from basic arithmetic to advanced calculus and physics. Equations are also used to model real-world phenomena, such as electricity, kinematics, and quantum mechanics. By studying equations and their solutions, we can gain a deeper understanding of the physical world around us.
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What is the relationship between green building and self-interest? (Select all that apply.)
Green building is burdensome but has advantages in terms of public image.
Green building should be considered when necessary resources are in short supply.
Green building practices can lead to planning and budget efficiencies in general.
Green building is attractive because of its long-term growth potential as a market.
Answers
The relationship between green building and self-interest include the following:
Green building is burdensome but has advantages in terms of public imageGreen building is attractive because of its long-term growth potential as a market.What is Green building?This is the process of reducing the environmental impact of buildings. This therefore leads to enhancement of the health of people.
Its relationship with self interest can seen listed above as the most appropriate choice.
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if the specific surface energy for aluminum oxide is 0.90 j/m2 and its modulus of elasticity is (393 gpa), compute the critical stress required for the propagation of an internal crack of length 0.3 mm.
Answers
To compute the critical stress required for the propagation of an internal crack of length 0.3 mm in aluminum oxide with a specific surface energy of 0.90 j/m2 and a modulus of elasticity of 393 GPa, we can use the following equation:
Critical Stress = (2 x Specific Surface Energy x Modulus of Elasticity) / Crack Length
Plugging in our values:
Critical Stress = (2 x 0.90 j/m2 x 393 GPa) / 0.3 mm
Critical Stress = 8,760 MPa
The specific surface energy for aluminum oxide is given as 0.90 J/m2 and its modulus of elasticity is 393 GPa. We are to compute the critical stress required for the propagation of an internal crack of length 0.3 mm.
Given formulae: Tensile Stress = F/A, where F is the tensile force applied and A is the cross-sectional area of the surface upon which the force is applied Modulus of Elasticity = Tensile Stress/Strain, where strain is the ratio of the change in length of an object to the original length.
Critical Stress = σ_0 √πa/2 * Y_b
The first step is to compute the tensile stress, which is given as:
Tensile Stress = F/A
We can find the cross-sectional area using the formula for the area of a circle. This formula is given as: Area = πr^2, where r is the radius of the circle. We can find the radius of the circle as r = 0.3/2 mm = 0.15 mm = 0.00015 m. We can now compute the area of the circle as follows: Area = π(0.00015)^2 = 7.07 × 10^-8 m^2.The tensile stress is given as: Tensile Stress = F/A = σ, where F is the tensile force applied, and A is the cross-sectional area of the surface upon which the force is applied. We can rearrange the equation above to get: F = Aσ = 7.07 × 10^-8 × σThe modulus of elasticity is given as:
Modulus of Elasticity = Tensile Stress/Strain, where strain is the ratio of the change in length of an object to the original length.
We can rearrange the equation above to get: Tensile Stress = Modulus of Elasticity × Strain
Let us assume that the original length of the object is L, and the change in length of the object is ΔL, then the strain is given as: Strain = ΔL/L
The critical stress is given as: Critical Stress = σ_0 √πa/2 * Y_b . We can now use the values of the specific surface energy and the modulus of elasticity to calculate the critical stress as follows: Critical Stress = √((2 × 0.90 × 10^-6 × 393 × 10^9)/((π × 0.3 × 10^-3)/2)) = 97.2 MPa
Therefore, the critical stress required for the propagation of an internal crack of length 0.3 mm is 97.2 MPa.
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What type applications can benefit from OpenShift?
Answers
OpenShift can benefit the following applications;
MicroservicesDevOpsCloud-native applicationsHybrid and multi-cloud environmentEnterprise applicationsHow to determine the applicationsRed Hat created the OpenShift container platform, which offers a wide range of tools and functionality for setting up, running, and scaling applications.
In general, OpenShift provides a robust and adaptable platform for a variety of applications, supporting current software development methodologies and simplifying deployment in different contexts.
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Describe a project in which you would use a pleater, ruffling foot, or gathering foot. Explain each of these tools and choose the one that might be necessary for the project you are describing.(FASHION DESIGN)
Answers
A project that requires using a pleater, a ruffling foot, or a gathering foot is the creation of a dress.
A pleater, a ruffling foot, and a gathering foot are all accessories for sewing machines or machines themselves that help fashion designers to give the fabric a different shape or texture, and therefore create unique pieces.
Pleater: This tool includes multiple needles that go through the fabric to create multiple pleatsRuffling foot: This is usually an accessory for sewing machines to create rufflesGathering foot: This tool is used to create gathers in fabric, these differ from ruffles because they are smaller and more subtle than rufflesAll of the tools can be used in the creation of a dress, for example, a pleater can be used in the top section of the dress to give it a nice texture and make it different from the skirt. In the same way, others such as the ruffling foot or the gathering foot can be used in the sleeves of the dress.
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Calculate the volume of material used in making 100 ft of 4 in. type K, copper tubing.
Answers
The volume of material used in making 100 ft of 4 in. type K, copper tubing will be 1443.3 in³ or 0.835 ft³
What is volume?Volume is a measurement of three-dimensional space that is occupied. It is frequently numerically quantified using SI-derived units or various imperial or US customary units. The definition of length is linked to the definition of volume.
Let's begin by listing out the given variables:
length (l) = 100 ft = 1200 in, nominal size = 4 in
The dimension and physical characteristics of type M copper tubing of nominal size 4 inch are given in the copper tube of industry-standard guide of the design and installation of the piping system is illustrated.
Outer diameter (Do) = 4.125 in ⇒ ro = Do ÷ 2 = 2.0625 in, Inner diameter (Di) = 3.935 in ⇒ ri = Di ÷ 2 = 1.9675 in
calculate the volume of the pipe, we use the formula
V = π(ro² - ri²) * l
V = π(2.0625² - 1.9675²) * 1200
V = 1443.3 in³ or 0.835 ft³
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1. You use
switches when you
have two switches controlling one or more
lights.
single pole
4-way
2-way
3-way
Answers
Igneous rocks are formed due to the
a cooling of magma
b weathering of rocks
c changes in pressure
d deposition of sediment
Answers
Would be the answer
Answer:
a. cooling of magma
Explanation:
they form when magma cools
A horizontal force P is applied to a 130 kN box resting on a 33 incline. The line of action of P passes through the center of gravity of the box. The box is 5m wide x 5m tall, and the coefficient of static friction between the box and the surface is u=0.15. Determine the smallest magnitude of the force P that will cause the box to slip or tip first. Specify what will happen first, slipping or tipping.
Answers
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.
How many levels of certifications exist under the LEED certification program?
Answers
The LEED certification program offers four levels of certification: Certified, Silver, Gold, and Platinum.
Explanation (100 words): The LEED (Leadership in Energy and Environmental Design) certification program, developed by the U.S. Green Building Council (USGBC), provides recognition for environmentally sustainable building practices. The program offers four levels of certification based on the performance and sustainability features of a building project. These levels are Certified, Silver, Gold, and Platinum. The certification levels are determined by a point-based system, where projects earn points for various sustainable design and construction strategies implemented. The more points a project earns, the higher the certification level it can achieve. The levels of certification serve as a way to indicate the degree of sustainability and environmental performance of a building project.
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PROJECT MANAGEMENT
Activity – RENOVATING A HOME
Questions:
As a project manager, you realize there may be substantial resistance to changes brought about by this project, describe any strategy or strategies you would employ to resolve this issue. (Make mention of any group from which this resistance may originate.)
After analyzing this project what TWO (2) risks have you identified and how would you respond to these risks as the project manager?
Answers
As a project manager, I would employ the following strategy to address resistance to changes in the home renovation project:
Strategy: Effective Communication and Stakeholder Engagement
To address resistance to changes, it is crucial to establish open and transparent communication channels with all stakeholders involved in the project. This includes homeowners, contractors, architects, and any other relevant parties. By actively engaging with stakeholders and listening to their concerns, I can gain their trust and create a collaborative environment.
Firstly, I would conduct regular meetings to explain the purpose and benefits of the renovation project. This would help stakeholders understand the need for change and alleviate any uncertainties or misconceptions. Clear and concise communication is key to ensuring everyone is on the same page.
Secondly, I would encourage active participation from stakeholders, seeking their input and involvement in decision-making processes. By involving them in the planning and design stages, they will feel a sense of ownership and be more willing to embrace the changes. This approach also allows for potential conflicts or objections to be addressed early on, reducing resistance later in the project.
Additionally, I would establish a feedback mechanism to address any concerns or issues promptly. This could involve setting up a dedicated communication channel or having a designated project team member responsible for handling stakeholder queries. Regular updates on project progress and milestones would also help manage expectations and build trust.
By employing effective communication and stakeholder engagement strategies, I can minimize resistance to changes and foster a collaborative environment throughout the home renovation project.
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A heat engine with a thermal efficiency of 25% is connected to an electric generator with an efficiency of 95%. A liquid fuel providing heat is consumed at 2.29 litres per hour. What is the power output in kW from the generator?
Heat of Combustion: 43.7 MJ/kg
Density of the fuel: 0.749 g/ml
Answers
Answer:
4.94 kW
Explanation:
The heat energy produced by the fuel in one hour is ...
(2.29 L/h)(0.749 kg/L)(43.7 MJ/kg) = 74.954677 MJ/h
Then the power output is ...
(74.954677 MJ/h)(1 h)/(3600 s) = 20.8207 kJ/s
Multiplying this heat energy by the efficiencies of the processes involved, the output power is ...
(20.8207 kW)(0.25)(0.95) = 4.94 kW
Tammy, age 18 months, has a beach ball and a Nerf ball, and she knows what a basketball and a tennis ball are. When she encounters a golf ball for the first time, she mentally adds this new example to her "ball" scheme. Adding another example to an existing scheme is a process that Piaget called ________.
Answers
Answer:
Explanation:
The process that Piaget called "adding another example to an existing scheme" is called assimilation. Assimilation refers to the cognitive process of incorporating new information or experiences into existing mental schemas or frameworks. In this case, Tammy assimilates the new example of a golf ball into her existing "ball" scheme, expanding her understanding of what falls under the category of a ball.
Thinking Critically and Solving Problems
Posttest
Which step comes first in the decision making process?
A) Analyze the actions.
B) Collect information.
C) List all possible actions.
D) Identify the problem.
G
Submit
Answers
D) Identify the problem step comes first in the decision-making process.
What is decision-making?In psychology, decision-making (also spelled decision making and decisionmaking) is regarded as the cognitive process resulting in the selection of a belief or a course of action among several possible alternative options. It could be either rational or irrational. The decision-making process is a reasoning process based on assumptions of values, preferences and beliefs of the decision-maker. Every decision-making process produces a final choice, which may or may not prompt action. Research about decision-making is also published under the label problem solving, particularly in European psychological research. Decision-making can be regarded as a problem-solving activity yielding a solution deemed to be optimal, or at least satisfactory. It is therefore a process which can be more or less rational or irrational and can be based on explicit or tacit knowledge and beliefs. Problem solving and critical thinking refers to the ability to use knowledge, facts, and data to effectively solve problems.
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technician a says that an electrical short circuit causes excess current flow. technician b says a short causes excess resistance to develop. who is right?
Answers
Technician A is correct. A short circuit causes excess current flow due to the decreased resistance within the circuit.
What is Resistance?
Resistance is opposition to the flow of electric current. It is an electrical property of a material, measured in ohms, which is represented by the Greek letter Omega (Ω). Resistance is caused by the collisions of electrons with the atoms of the material. The higher the resistance, the more collisions occur, which means that the current is being slowed down. Resistance can be used to control the current in electrical circuits and devices, such as resistors and transistors. Resistance is also used to convert electrical energy into thermal or mechanical energy, or to create electromagnetic fields.
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A sensor produces a signal with amplitude 15 mV. A voltage amplifier must amplify the signal such that the amplitude of the output signal is at least 2 V. What is the minimum voltage gain (in dB) for the amplifier to meet the requirements
Answers
Answer:
42.50 dB
Explanation:
Determine the minimum voltage gain
amplitude of input signal ( Vi ) = 15 mV
amplitude of output signal ( Vo) = 2 V
Vo = 2 v
therefore ; minimum gain = Vo / Vi = 2 / ( 15 * 10^-3 )
= 133.33
Minimum gain in DB = 20 log ( 133.33 )
= 42.498 ≈ 42.50 dB
An asbestos pad is square in cross section, measuring 5 cm on a side at its small end, increasing linearly to 10 cm on a side at the large end. The pad is 15 cm high. If the small end is held at 600 K and the large end at 300 K, what heat‐flow rate will be obtained if the four sides are insulated? Assume one‐dimensional heat conduction. The thermal conductivity of asbestos may be taken as 0.173 W/m⋅K.
Answers
All hermetic compressors require a crankshaft seal.
True
False
Answers
Which of the following is an implication of low
variety?
A. low unit cost
B. flexibility needed
C. high complexity
D. matching customers specific needs
PLEASE EXPLAIN WHICH IS CORRECT WITH EXPLANATION
Answers
The correct option for the implication of low variety is B) Flexibility needed. Variety refers to the number of different products, services, or activities that an organization offers. High variety means that a company offers a wide variety of products or services, while low variety means that a company provides a limited range of products or services.
One of the implications of low variety is that customers have limited options. They are restricted to purchasing only those goods and services that the company offers, which may not match their requirements or preferences. This may lead to losing customers to rivals who offer a greater variety of goods and services.
In the case of low variety, it is critical to have the required flexibility. Customers may ask for certain specific goods or services that are not provided by the company. To meet customer requirements, the company should be adaptable and able to rapidly respond to customer requests by expanding its product line. As a result, low variety necessitates the need for flexibility.
The other given options are not valid. Low unit cost is not related to low variety. Unit cost may be affected by economies of scale and other factors, but it is not directly related to variety. High complexity is not related to low variety as well. As the range of goods and services offered by the company increases, the complexity of the company's operations and management also increases. Matching customers' specific needs is partially correct because the company cannot match customer specific needs in low variety. In low variety, the company has a limited range of goods and services, so it is not possible to fulfill all the customers’ specific needs.
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The set of line styles and line thickness used on drawings used on drawings are referred to as the ____.
Answers
Answer:
I think it's referred as the outline
1) A pole carries a vertical load of 200 kN. Determine the vertical total stress increase at a depth 5 m:-
a) Directly below the pole, and
b) At a radial distance of 2 m.
Answers
a)The vertical total stress increase directly below the pole is 16.17 kPa.
b)The vertical total stress increase at a radial distance of 2 m from the pole is 4.24 kPa.
To solve this problem,
we can use the Boussinesq's equation, which relates the vertical total stress increase to the load and the depth.
The Boussinesq's equation is given by:
Δσz = (q / π) * [(1 + ν) * z / r^2 * ([(1 + r^2 / z^2)]^(1/2))]
where:
Δσz = vertical total stress increase
q = load on the pole = 200 kN
z = depth = 5 m
r = radial distance from the pole = 2 m
ν = Poisson's ratio = assume as 0.3 for soil
a) Directly below the pole (r = 0):
Δσz = (q / π) * [(1 + ν) * z / r^2 * ([(1 + r^2 / z^2)]^(1/2))]
Δσz = (200 / π) * [(1 + 0.3) * 5 / 0^2 * ([(1 + 0^2 / 5^2)]^(1/2))]
Δσz = 16.17 kPa
Therefore, the vertical total stress increase directly below the pole is 16.17 kPa.
b) At a radial distance of 2 m:
Δσz = (q / π) * [(1 + ν) * z / r^2 * ([(1 + r^2 / z^2)]^(1/2))]
Δσz = (200 / π) * [(1 + 0.3) * 5 / 2^2 * ([(1 + 2^2 / 5^2)]^(1/2))]
Δσz = 4.24 kPa
Therefore, the vertical total stress increase at a radial distance of 2 m from the pole is 4.24 kPa.
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Draw a sinusoidal signal and illustrate how quantization and sampling is handled by
using relevant grids.
Answers
Explanation: Your mums gay
When creating a double flare on tubing, how far above the top of the tubing clamp should the tube extend?
Answers
Answer:
When creating a double flare on tubing, it is recommended that the tube extend approximately 1/8 to 1/4 inch above the top of the tubing clamp. This allows for a sufficient amount of material to be flared without creating excess excess material that could potentially cause issues during the flaring process. It is important to properly measure and mark the tubing before beginning the flaring process to ensure that the final result meets the desired specifications.
What is the primary reason traffic laws exist ?
Answers
Answer:
It's to ensure a driver's safety.
A low-altitude meteorological research balloon, temperature sensor, and radio transmitter together weigh 2.5 lb. When inflated with helium, the balloon is spherical with a diameter of 4 ft. The volume of the transmitter can be neglected when compared to the balloon's size. The balloon is released from ground level and quickly reaches its terminal ascent velocity. Neglecting variations in the atmosphere's density, how long does it take the balloon to reach an altitude of 1000 ft?
Answers
Answer:
12 mins
Explanation:
The summation of the forces in vertical direction
= Fb - Fd - w = 0 ∴ Fd = Fb - w ----- ( 1 )
Fb ( buoyant force ) = Pair * g * Vballoon ------- ( 2 )
Pair = air density , Vballoon = volume of balloon
Vballoon = \(\frac{\pi D^3}{6}\) , where D = 4 ∴ Vballoon = 33.51 ft^3
g = 32.2 ft/s^2
From property tables
Pair = 2.33 * 10^-3 slug/ft^3
μ ( dynamic viscosity ) = 3.8 * 10^-7 slug/ft.s
Insert values into equation 2
Fb = ( 2.33 * 10^-3 ) * ( 32.2 ) *( 33.51 ) = 2.514 Ib
∴ Fd = 2.514 - 2.5 = 0.014 Ib ( equation 1 )
Assuming that flow is Laminar and RE < 1
Re = (Pair * vd) / μair -------- ( 3 )
where: Pair = 2.33 * 10^-3 slug/ft^3 , vd = ( 987 * 4 ) ft^2/s , μair = 3.8 * 10^-7 slug/ft.s
Insert values into equation 3
Re = 2.4 * 10^7 ( this means that the assumption above is wrong )
Hence we will use drag force law
Assume Cd = 0.5
Express Fd using the relation below
Fd = 1/2* Cd * Pair * AV^2
therefore V = 1.39 ft/s
Recalculate Reynold's number using v = 1.39 ft/s
Re = 34091
from the figure Cd ≈ 0.5 at Re = 34091
Finally calculate the rise time ( time taken to reach an altitude of 1000 ft )
t = h/v
= 1000 / 1.39 = 719 seconds ≈ 12 mins
Explain why Complements are used in the digital computer
Answers
Answer:
Explanation:
Complements are used in digital circuits, because it is faster to subtract by adding complements than by performing true subtraction. The binary complement of a number is created by reversing all bits and adding 1. The carry from the high-order position is eliminated.